recursal/Fanatic-Fandom huggingface dataset:
AL.SO M2B

**AL.SO M2B** is a summing module for the 500 series, manufactured by AL.SO.

## Official description

>
> The Al.So M2B is a summing module with 4 stereo inputs to one stereo master. The M2B has Mute controls for each stereo pair. Up to 6dB gain for the master out. Odd inputs are routed to the left output and even inputs to the right. Pan are made into your DAW and all the automations are still valid.
>
>
>
>

## References

1. ↑ https://www.gearslutz.com/board/product-alerts-older-than-2-months/146762-al-sos-modual-500-series-compatible-modules.html
2. ↑ http://www.soundtools.co.uk/Manufacturers/Al.So.htm
Warm Audio TB12 500

**Warm Audio TB12 500** is a pre-amp for the 500 series, manufactured by Warm Audio.

## Official description

>
> The Tone Beast is a great mic pre with loads of gain that can effortlessly capture an array of sources very well. With top notch CineMag transformers and multiple discrete signal paths, it's hard to beat its big, bold, fully-professional sound at its price.
> ​
> The Tone Beast is a mic pre that likes to be pushed and when pushed will colorize your signal ever so sweetly. The 2 opamps and 2 output transformers at the flip of their switches won't appear to be much different, but as one drives the pre into harmonic distortion, the unique character of each of these components becomes apparent. Additionally the Tone Beast is customizable and allows for other opamps to be sourced and easily swapped into the unit. I've pulled my best tones from this pre right at the saturation point (as loud as I can push the gain before clipping). The output control on the TB12 allows you to limit the signal exiting the preamp even when pushing the gain to really hot levels, giving you maximum control.
>
>
>
> * Utilizes premium grade CineMag USA Transformers
> * 71db of gain
> * Transformer selection provides both Steel and 50% Nickel CineMag output transformers for varying character
> * Transformer bypass switch allows for removal of the output transformer from the circuit
> * Discrete Opamp selection allows for choosing between a 1731(vintage) and 918(cleaner) style opamp. These are socketed/swappable with your choice of 2520 6 pin footprint opamps.
> * Impedance switch labeled TONE to switch between 150 and 600 ohms input impedance. Changes the Tone of all inputs (Mic, Line and Hi-Z.)
> * 2 Meg Ohm True HI-Z input on front panel sends instrument signal through entire circuit including both Cinemag Transformers and the discrete operational amplifier. Great for guitars, bass, keyboards and other instruments that have a 1/4″ output jack.
> * Capacitor selection between Tantalum and Electrolytic for different characters
> * 80hz hipass filter
> * Polarity Reverse
> * +48V phantom power
> * Output attenuation allowing for saturation flexibility of both the opamps and transformers
> * ¼" insert for the use of inline compressors, eq's etc..
> * Balanced XLR mic, balanced TRS line, and ¼" instrument inputs
> * -20db Pad
> * LED VU Meter
> * Compatible with standard 500 series racks
>
>
>
Ovie Audio MPN73

**Ovie Audio MPN73** is a pre-amp for the 500 series, manufactured by Ovie Audio.

## Official description

>
> * Preamplificador Clase A
> * 3 etapas de amplificacion
> * Sonido robusto y agradable
> * Llave de ganancia por pasos
> * Fader de salida
> * Hi/Lo impedance 300/1200
> * Entrada de instrumento activa
> * MIC/Line Switch
> * Phantom
> * 2 años de garantía
>
>
>
BAE 312A

**BAE 312A** is a pre-amp for the 500 series.

## Official description

>
> The 312A is available as a 500 series module or a single or dual channel 19" rackmount.
>
>
> Because there are no capacitors in the audio path, the 312A is super fast and punchy, allowing transients to pass easily, making them a favourite for drummers.
>
>
> Made with the highest quality parts including Jensen input and output transformers and the Avedis® 1122 opamp. The 312A also includes a high impedance DI for instruments.
>
>
>
> * Made using Avedis® 1122 opamps
> * Supplied with Jensen input and output transformers.
> * Remote power supply with four-foot cable capable of four times the current needed by the preamps for optimum sound quality.
> * Switches have gold contacts for long life.
> * XLR connectors on the back for mic input and output and phone jack in front for direct input.
> * High impedance direct input for guitar and synthesizer.
> * Separate front panel switches for phantom power.
>
>
>
Fredenstein F607

**Fredenstein F607** is a monitoring module for the 500 series, manufactured by Fredenstein. The module can only be used in the Fredenstein racks.

## Official description

>
> The F607 is a high performance professional monitor controller, offering an effective monitor volume control for project and home studios in combination with a Fredenstein Bento rack. The F607 features a second unbalanced stereo input as well as mute, dim, mono and balance control functions. If used in a Bento D rack with, all parameters can be monitored on the LCD display
>
>
>
>
Bereich03 Audio LC-HC

**Bereich03 Audio LC-HC** is a filter for the 500 series, manufactured by Bereich03 Audio.

## History

The Bereich03 Audio LC-HC was released in 2012.

## Official description

>
> This module contains a LowCut filter and a HighCut filter.
>
>
> At the HighCut filter you can change the slope from 12dB/oct to 6dB/oct. During the developing of this module I started with the 12dB/oct version. I realized that I can hear the cutoff frequency with the 12dB/oct slope. This is sometimes ok, but not always. So I decided to add a 6dB/oct slope. This is much more gentle. You can soften harsh sounds in a very natural way. The range goes from 2kHz up to 22kHz
>
>
> The LowCut filter has a 12dB/oct slope. The range goes from 20Hz up to 220Hz. When I started building this LowCut filter, I spent a lot of time experimenting with the shape of the cutoff point. In this module I ended up with a version where you can adjust the boost at the cutoff frequency with a poti.
>
>
>
>

## External links

* Official product page
* Review by *Sound on Sound*

## References

1. ↑ https://www.gearslutz.com/board/product-alerts-older-than-2-months/793401-lc-hc-500-series-bereich03-audio.html
Brent Averill 312A

**Brent Averill 312A** is a pre-amp for the 500 series, manufactured by Brent Averill Enterprises.

## History

The Brent Averill 312A was available by 2006.

After Brent Averill sold the company, the module was reissued as BAE 312A.

## References

1. ↑ https://www.gearslutz.com/board/so-much-gear-so-little-time/56224-brent-averill-bae-312a-got-one.html
A-Designs P-1

**A-Designs P-1** is a pre-amp for the 500 series, manufactured by A-Designs.

## Official description

>
> P-1 - The P-1 has the highest fidelity of all the A-Designs Audio 500 preamps, capturing the mojo of its older and larger sibling, the extremely popular Pacifica. It has a big low end, slightly forward midrange and extended highs. If you’re a fan of the Quad Eight or API sound, you’ll love the P-1! It shines on vocals, instruments, room mics, piano, and on instruments with sharp transients such as drums and various percussion instruments. If you’re building a lunchbox with drum recording in mind, a pair of P-1s is a superb choice for overheads when you want to capture the entire kit - especially the sizzle of the cymbals.
>
>
>
>
API 512C

**API 512C** is a pre-amp for the 500 series.

## Official description

>
> **512c Discrete Mic / Line Pre**
>
>
> **Features**
>
>
>
> * Mic Preamp with 65 dB of gain
> * Front and Back Panel Mic Input Access
> * Line/Instrument Preamp with 45 dB of gain
> * Front Panel Line/Instrument Input
> * LED VU meter for monitoring output level
> * 20 dB pad switch, applies to mic/line/instrument
> * 48v Phantom switchable power
> * Traditional API fully discrete circuit design with 2520 Op Amp
> * Features API's unique Five Year Warranty
>
>
> The API 512c is a mic / line / instrument preamp, world famous for its ability to provide a low noise (-129 EIN) and unusually good sounding front end for all types of audio applications. Sonically, it delivers the distinct API sound at an affordable price, and in the scalable API 500 Series format. Offering an impressive 65 dB of gain, the 512c includes phantom power, switchable polarity, -20 dB pad and Mic or Instrument/Line selector. Front panel XLR and 1/4 inch connectors combined with rear panel mic access allows for additional flexibility when installed into an API lunchbox®, API's 10 position 500V vertical rack, or an API console.
>
>
> The API 512c remains faithful to the circuit designs of API's founder Saul Walker. Artfully combining those circuits with API's proprietary transformers and the incomparable 2520 op-amp, the 512c is a highly musical and rich-sounding analog mic pre, equally at home in commercial recording spaces as it is in smaller home studios. Fully featured and still hand assembled, the 512c exhibits the reliability, long life, and uniformity which are characteristic of all API products.
>
>
>
>
A-Designs EM-Blue

**A-Designs EM-Blue** is a pre-amp for the 500 series, manufactured by A-Designs.

## Official description

> EM-Blue – Equipped with a nickel custom-wound output transformer for accentuated highs, the EM-Blue is the brightest sounding of the EM Series. It produces an airier, more top-end oriented tone than its EM-Series brothers and sisters. Many aspects of recording can be counter-intuitive; and, in many cases, you’ll want to pair opposites. For example, when used with a dark-sounding microphone or an alto vocalist, the brighter EM-Blue can open the sound up perfectly. This pre is also useful for providing a crisp “crack” when recording a snare drum. If you use the direct input, you just might fall in love with how an electric guitar sounds going thru its nickel transformers. The EM-Blue has a -20dB pad that enables you to get down and dirty with an electric guitar - just switch in the pad and crank the gain for a slight growl.
>
>
WesAudio DUE-PRE

**WesAudio DUE-PRE** is a pre-amp for the 500 series, manufactured by WesAudio.

## History

The WesAudio DUE-PRE was released in 2015.

## Official description

>
> Preamp circuit is switchable between two amps: RED and GREEN.
>
>
> RED mode is a British classic style preamp (1073) and GREEN is an American vintage style preamp (discrete opamp). Both preamps have unique sonic textures known as a best classical sound preamps.
>
>
> Carnhill transformers are responsible for matching impedance and de/symmetrization circuits. Preamp is loaded with two PADs: IN 20dB PAD and OUT 8dB PAD which allows to saturate both preamp and output transformer.
>
>
> Additionally DUE-PRE has front input XLR Combo socket which can be used in both ways: as a mic input and as a instrumental input. Instrumental input is a high impedance input of which signal feeds input transformer through FET transistor. Module can draw up to 5W of power.
>
>
> **Specfications:**
>
>
>
> * High quality Grayhill gain switch
> * 64dB of gain (preamps are matched with 0.5dB accuracy)
> * Canrhill in/out transformers
> * 20dB input PAD
> * 8dB output PAD (allowing saturation of both preamp and transformer)
> * Polarity Reverse switch
> * +48V phantom power
> * Front autosense XLR mic
> * Hiz Fet DI front input (the signal passes through the input transformer)
> * LED VU meter
>
>
>

## References

1. ↑ https://www.gearslutz.com/board/product-alerts-older-than-2-months/996422-wesaudio-due-pre-500-series-preamp.html
Roll Music Systems RMS5A7 Tubule

**Roll Music Systems RMS5A7 Tubule** is a pre-amp for the 500 series, manufactured by Roll Music Systems.

## History

While first announced in 2007 (under the model name RMS5Y7), the Roll Music Systems RMS5A7 Tubule was released in 2008.

## Official description

>
> A real, transformer-coupled tube microphone preamplifier in the convenient package you never thought possible.
>
>
> At long last, all the warm sweet satisfaction of a real transformer-coupled, high-voltage vacuum tube microphone preamplifier in the convenient and cost-effective 500-series modular format.
> With the explosion of new modular products for the 500-series frames sold by various manufacturers, user requests for a tube-based module have been met almost universally with claims by designers and engineers that it couldn't be done. We took that as a dare. The result is not only a technological achievement, but a sonic masterstroke.
>
>
> The RMS5A7 Tubule from Roll Music Systems combines the full-featured convenience of a modern mike preamp module with the rich, satisfying sound of a transformer-coupled, all-tube preamp evocative of the elusive bygone classics. This is not a wimpy starved-plate design, nor is it an op-amp based preamp with a tube stuck on top for marketing appeal. It's all tubes and iron, with sophisticated modern power management circuitry to generate the high-voltage plate supply and high-current heater supply to power the tube. Careful design of this high-efficiency power circuit allows the Tubule to work within the space and power consumption limitations of a single module.
>
>
> Robust transformer coupling and flexible, wide-ranging gain controls make the Tubule perfectly suited to everything from low-output vintage ribbon mikes to the hottest modern condensers. The input pad, attenuator and gain control also work together to provide a wide tonal variety. For the cleanest tones, keep the input attenuator up and the gain control low. For more rich tube coloration, engage the input pad and turn the attenuator down in order to use a higher gain setting without overloading the Tubule or other devices in the signal chain. The continuously-variable input attenuator also allows for very accurate gain settings that can be easily recalled.
>
>
> The RMS5A7 Tubule from Roll Music Systems is now a part of the VPR Alliance. It has been independently confirmed to be fully compatible, both electrically and mechanically, with any enclosure that complies with the standards for the 500-series format.
>
>
>
>

## References

1. ↑ https://www.gearslutz.com/board/product-alerts-older-than-2-months/149123-roll-music-systems-announces-new-tube-preamp-module.html
2. ↑ https://www.gearslutz.com/board/product-alerts-older-than-2-months/148962-new-roll-music-500-series-pre-amp-valve-2.html
Triton Audio D2O 500

**Triton Audio D2O 500** is a pre-amp for the 500 series, manufactured by Triton Audio.

## History

The Triton Audio D2O 500 was released in 2010.

## Official description

>
> D2O is a low noise discrete microphone preamp, it is a further development of the famous German V series preamps of the 40's and 50's, widely recognized as one of the best sounding preamps.
>
>
> **D2O 500 series**
>
>
> D2O is also available as a single slot 500 series format unit. The required operating voltage is provided by a purpose designed low noise discrete dc/dc step-up converter which feeds its power to D2O's low noise, low esr voltage regulator. Further internal operation is equal to the standalone version.
>
>
> **General layout**
>
>
> D2O's general layout consists of a Lundahl 1571 input transformer followed by 2 single ended gain stages. The second gain stage can be selected to be either a high gain Fet or a Tube stage. when the high gain, all Fet circuit is engaged D2O becomes an ideal companion for microphones with a relatively low output like ribbon microphones. With the hybrid Fet/Tube circuit is engaged the sonic benefits of having a tube in the signal path can be utilized. Output drive is supplied by a discrete low impedance Fet buffer with superb sonic properties. Quality Paper in oil coupling capacitors are used, all other used components are high-end grade aswell.
>
>
>
> * Low noise / low esr power supply
> 	+ In single ended preamp designs the quality of the power supply is crucial, D2O is fitted with a discrete low esr voltage regulator built with low noise components enabling optimal performance to the amplifier circuit.
>
>
> * switchable transformer ratio / input impedance
> 	+ By selecting the transformer ratio switch a selection between a 1:1.75 (LO) or 1:3.5 (HI) transformation ratio can be made. Besides setting voltage gain, this also switches the input impedance of the amplifier between 2.25KOhm and 6.25 KOhm. Different transformation rate and impedance selection options are very desirable as they allow for more sonic options from the connected microphone.
>
>
> * selectable all Fet or Tube-Fet circuit
> 	+ The Tube-Fet switch determines whether D2O functions as an hi gain, all Fet or hybrid Tube-Fet circuit, each with its unique sonic character.
>
>
>

## References

1. ↑ https://www.gearslutz.com/board/so-much-gear-so-little-time/442096-triton-audio-d2o-500-series-mic-pre.html
LaChapell Audio 583e

**LaChapell Audio 583e** is a pre-amp and equalizer for the 500 series, manufactured by LaChapell Audio.

## History

The LaChapell Audio 583e was released in 2007.

## Official description

>
> The Model 583E is a 500 series tube microphone preamp. It features the same amplifier stage found on the 583S including the Jensen JT-115k input transformer coupled with an ultra-clean transformer-less three-band EQ section with fully sweeping frequency controls and cut/boost settings of +/- 8dB. The EQ can run as an integrated EQ serving the preamplifier or separate as its own autonomous module where both units run independently.
>
>
>
>

## References

1. ↑ https://www.gearslutz.com/board/product-alerts-older-than-2-months/124215-lachapell-audio-583-500-series-preamp-eq.html
SKnote AVE

**SKnote AVE** is an enhancer and delay/chorus processor for the 500 series, manufactured by SKnote.

## Official description

>
> Three effects in one double unit “500” series device.
>
>
>
> * Stereo parallel compression on high frequency range (from a classic trick with a noise reduction unit).
> * Stereo delay and pitch shifting for doubling. Add width and thickness.
> * Transparent chorus for stereo widening.
>
>
> Not only for vocals.
>
>
>
>

## References

1. ↑ https://www.gearslutz.com/board/so-much-gear-so-little-time/956139-aes-la-sknote-releases-ave-analog-vocal-enhancer.html
NonLinearAudio Flexiguy

**NonLinearAudio Flexiguy FG500** is a pre-amp for the 500 series, manufactured by NonLinearAudio.

## Official description

>
> The Flexiguy is a microphone/line/direct inject (D.I.) preamplifier that offers up detailed and flexible tone, useful and controlled harmonic contribution and a somewhat "tape-like" dynamic response.
>
>
> The overall architecture and design, careful component selection and custom parts manufactured exclusively for the Flexiguy combine to make this a unique device that is anything but a one trick pony. Overload characteristics, when pushed, are designed to be creatively useful. When operated more conservatively, working between the two operating modes (described below) and with or without the impedance converting pad engaged, the utility of this module is quite broad.
>
>
> While Flexiguy is primarily intended as a mic preamp, it's large core input transformer and D.I. input can easily handle line level input sources (i.e. for additional makeup gain, tonal coloration, line driving, or other creative purposes). Its transformer-balanced output is capable of driving loads as low as 300 Ohms. When used in Purple Audio Sweet Ten racks you get access, via the 1/4" Opt Out connector, to an additional unbalanced output which can drive even heavier loads.
>
>
>
>
A-Designs EM-Silver

**A-Designs EM-Silver** is a pre-amp for the 500 series, manufactured by A-Designs.

## Official description

>
> EM-Silver - If you like the vintage Neve sound, you’ll love the EM-Silver. It has a darker tone than the P-1, EM-Red, and EM-Blue. Its sound is based on a custom-wound steel output transformer, which makes it an excellent match for ribbon microphones since steel transformers were widely used in the early days of recording and broadcast - it was the combination of steel transformer and ribbon mic that gave broadcasters and singers that “Voice of God” sound that has lit up so many vocal recording and the amplified spoken word for decades. The EM-Silver is an outstanding preamp for bass guitar and keyboards, and is also pretty killer on kick drum. For brighter sound sources, the EM-Silver is the preamp of choice when you want less top end or a vintage-type sound…especially when used with ribbon mics, or on modern, brighter condensers to smooth out top end.
>
>
>
>
Black Lion Audio B12A 500

**Black Lion Audio B12A 500 Mic Pre** is a pre-amp for the 500 series.

## Official description

>
> The B12A MkII 500 packs the same punch as its 1⁄2 rack cousin, but in the convenient and flexible 500 series format. The API®-style design features a delicious CineMag input transformer, serves up huge portions of low-noise gain, and has the same classic American rock sound that the original API® 312A is known for! Get ready to fill your lunchbox®, ‘cause once you go Black Lion Audio, you never go back!
>
>
> The B12A MkII 500 is a single-channel, 500 series microphone preamp in the style of an API® 312A. It features a CineMag input transformer, an Edcor output transformer, a Hi-Z input, phantom power, pad, and phase. Its plentiful, low-noise gain makes it easy to use with a wide range of microphones in live, broadcast, and studio environments. Its ultra-punchy, detailed Hi-Z input is perfect for capturing keyboards, synthesizers, and drum machines. It’s the ideal companion to pillowy, fat sounds, and will liven up a mix with an undeniable energy!
>
>
> Features
>
>
>
> * 500 Series format (lunchbox® required)
> * Cinemag Input Transformer
> * Edcor Output Transformer
> * 70dB Gain
> * Hi-Z Input (passive, unbalanced)
> * Phantom Power
> * 18dB Pad
> * Phase Switch
>
>
>
Lindell Audio 6X-500

**Lindell Audio 6X-500** is a pre-amp for the 500 series, manufactured by Lindell Audio.

## History

The Lindell Audio 6X-500 was released in 2012.

## Official description

>
> The Six X Five Hundred is a one channel transformer coupled Microphone Preamplifier and Passive 2 Band Equalizer. The Preamp is an all discrete design based upon our hybrid amplifier. (It can be upgrade with ou Vintage OPA)
>
>
> The Equalizer is our take on the magical classic Pultec design. It’s got 15db boost of the creamiest high end you’ve ever heard and the most punchy low end heard the 21th Century.
>
>
> The Sound can be described as ”Fast” ”Punchy” and ”In ya face”.
>
>
>
> * Transformer coupled Balanced inputs and Balanced Outputs
> * Up to 65db of Gain
> * Passive Pultec Equalizer. Inductor + hybrid gain make-up amplifier
> * 3 Step Switched Eq Low Freq Boost 30Hz, 60Hz, 100Hz +/-10%
> * 3 Step Switched Eq High Freq Bosst 6kHz, 10kHz, 16kHz +/-10%
> * Selectable High Boost Bandwidth on pcb
> * Polarity Reverse
> * 48V Phantom Power
> * 5-LED VU Meters
> * Gold Plated Pcb
> * Retail Price $329.95
>
>
>

## References

1. ↑ https://www.gearslutz.com/board/product-alerts-older-than-2-months/702011-lindell-audio-news.html
Neve 1073LB

**Neve 1073LB** is a pre-amp for the 500 series, manufactured by AMS Neve.

## Official description

>
> Designed and manufactured in England, the 1073LB retains the unique sonic characteristics of the original 1073 Classic microphone preamplifier by using the same architecture, matching components and original hand-wound transformers. And it delivers it in a modern and portable form-factor that professional producers and engineers demand.
>
>
> With new features like a fine TRIM control, switchable microphone input impedance, signal presence LED, intelligent protected switching of front combi-XLR input connector and Neve’s clever Audio Processing Input design, the 1073LB takes your 500-series rack to the next level.
>
>
> Simply install into an empty slot in your compatible 500-series rack, connect your microphone or line level signals and inject that legendary sound into your audio creations.
>
>
>
> * Classic transformer microphone preamp amp (Class A design)
> * Neve designed hand-wound transformers
> * Both Mic and Line inputs are transformer balanced and earth free
> * Gain knob with Signal Presence LED
> * +5/-20dB level Trim control with integrated phantom power on/off switch
> * Phase, Impedance and Front Input selector switches
> * Front combi-XLR connector with intelligent switching of phantom power
> * *Audio Processing Insert* design allows processing from adjacent Neve modules in same LunchboxTM to be inserted into the 1073LB’s pre-output stage
> * Microphone Input: Gain -80db to -20dB in 5dB steps
> * Line Input: Input impedance 4k ohms bridging, gain -20dB to +10dB in 5dB steps
> * Output is transformer balanced and earth free
> * Distortion: Not more than 0.07% from 50Hz to 10kHz at +20dBu output
> * (80kHz bandwidth)
> * Freq Response: ±0.5dB 20Hz to 20kHz, -3dB at 40kHz
> * Crafted in England by Neve engineers
>
>
>

## References

1. ↑ https://www.gearslutz.com/board/product-alerts-older-than-2-months/546312-neve-1073lb-500-series-mic-pre.html
Ovie Audio 500+

**Ovie Audio 500+** is an 11-slot rack for the 500 series, manufactured by Ovie Audio.

## Official description

>
> 11 Slots Serie 500 Rack.
> Tope de linea de Gabinete y hermano mayor del gabinete mini500
> Rack Expandido de 3U y 11 slots, FULL COMPATIBLE con serie500. Posee varias opciones de ground mediante jumpers, como tambien stereo link entre canales.
>
>
> Todos los modulos Ovie son compatibles para serie 500.
> Incluye la fuente 500+ PSU totalmente sobredimensionada, lo que nos da como resultado un amplio margen de perfomance y vida util.
> Todos los rails de voltaje se encuentran protegidos por fusibles individuales.
> 2 años de garantía
>
>
>
>
Bereich03 Audio Limiter

**Bereich03 Audio Limiter** is a limiter for the 500 series, manufactured by Bereich03 Audio.

## History

The Bereich03 Audio Limiter was released in 2015.

## Official description

>
> **Limiter:**
>
>
> This is a fast controlled VCA with peak detector side chain. Attack time is fixed. There is no make up gain. Set the Threshold to the -1dB point of your A/D converter. Then rise the input until you get the desired gain reduction.
>
>
>
>

## References

1. ↑ https://www.gearslutz.com/board/new-products-coming-soon/999755-musikmesse-2015-modular-mastering-desk-bereich03-audio.html
Bereich03 Audio Side-only

**Bereich03 Audio Side-only** is a stereo–imaging processor for the 500 series, manufactured by Bereich03 Audio.

## History

The Bereich03 Audio Side-only was released in 2015.

## Official description

>
> This module affects only the side signal of a stereo source.
> Gain, LowCut, 1-band EQ and a Solo-Function to listen to the Mono or Side-signal.
> If you leave the Mid-Solo in, you can make mono version of your mix.
>
>
> [The Bereich03 Audio Side-only] contains the following blocks:
>
>
>
> * Gain stage with +/- 5dB
> * LowCut filter with 6 different frequecies
> * 1 broad band Baxandall EQ with +/-10dB
> * Solo function, to listen to the side or mid signal
> * Hardwire bypass
>
>
>

## External links

* Official product page
* Review by *Sound on Sound*

## References

1. ↑ 1.0 1.1 https://www.gearslutz.com/board/product-alerts-older-than-2-months/994342-side-only-500-series-bereich03-audio.html
2. ↑ http://www.bereich03-audio.de/bereich03-audio/Mastering-Side-only.html
BAE 1023L

**BAE 1023L** is a pre-amp and equalizer for the 500 series.

## Official description

>
> The 1023L — based on the classic 1023 — takes the preamp and EQ from the 1073 and expands upon it with significantly more frequency options in the high and mid sections, even allowing users to play the mid bell curve directly against the high and low shelves where they overlap.
>
>
> The 1023L is completely handwired using Carnhill (St. Ives) transformers. It has the exact same mic/line preamp as the 1073, but with significantly more frequencies in the mid and high sections.
>
>
> Aside from simply offering more frequency settings to play with, these expanded EQ sections also allow you to play the mid bell curve directly against the high and low shelves where they overlap. This capability opens the tone shaping possibilities in very interesting and musical ways.
>
>
>
> * High Frequency: +/-16dB shelving with selectable frequencies of 10kHz, 12kHz, 16kHz, 20kHz and 24kHz.
> * Low Frequency: +/-16dB shelving with selectable frequencies of 35Hz, 60Hz, 110Hz & 220Hz.
> * Mid Range: +/-12dB or +/-18dB peaking with switchable selectable centre frequencies of 160Hz, 270Hz, 360Hz, 510Hz, 700Hz, 1.6kHz, 3.2kHz, 4.8kHz, 7.2kHz, 8.2kHz, 10kHz.
> * High Pass Filter: 18dB per octave slope, switchable between 45Hz, 70Hz, 160Hz & 360Hz.
> * EQ Button: Switches the equaliser on or off
> * Phase Button: 180°
>
>
>
Fredenstein F609

**Fredenstein F609** is a pre-amp for the 500 series, manufactured by Fredenstein.

## History

The Fredenstein F609 was released in 2015.

## Official description

>
> The F609 is a professional tube microphone preamplifier, using two double-triodes, one ECC802S and one ECC803S, in a single 500 series rack module. It provides an +160V power-supply to avoid starving the tubes. The F609 uses high quality American made input and output transformers.
>
>
> Additional features are: 20db Pad, polarity control, phantom power, a two stage low-cut filter, and a standby mode to preserve the tubes if not in use.
>
>
> The sound is very smooth with a big, but well defined, low-end. The output level control allows to change the characteristic of the amp and to run the first stages all the way up to distortion.
> As all Fredenstein products, the F609 is designed by a German-American team and manufactured in Taiwan.
>
>
>
>

## References

1. ↑ https://www.gearslutz.com/board/product-alerts-older-than-2-months/978700-fredenstein-f609-single-slot-500-series-tube-mic-pre.html
Aphex Dual RPA 500

**Aphex Dual RPA 500** is a dual pre-amp for the 500 series.

## Official description

>
> *The DUAL RPA 500 is a two channel, tube mic pre inspired by the popular Channel and 207D preamps. Aphex patented Mic Limiter technology. Transformerless, electronically balanced I/O. Includes 20-segment input meter and 3-position output level switch.*
>
>
> The Dual RPA 500 is a two channel, tube mic pre inspired by the popular Channel and 207D preamps. The DUAL RPA 500 features the Aphex patented Mic-Limiter technology from the 207D and 1788A that works before the preamp. With the limiter on, it is nearly impossible to clip the input of the preamp.
>
>
>
> * Front panel 10Mohm, ¼” inputs for the connection of instruments like guitar and bass. These inputs override the inputs on the rear of the receiving frame when connected.
> * 3-way switches allow the selection of +16, +20 or +24dBu output levels.
> * The 20-segment input meters allow input levels to be easily seen, even from a distance.
> * 65 dB of gain to properly operate dynamic, condenser and ribbon microphones and a 26dB pad for very loud sources.
> * Illuminated buttons control Phantom Power, Phase Reverse, 75Hz High Pass Filter and Mic Limiter on/off.
>
>
> Applications:
>
>
> Live Performance- One of the reasons that the 207D is so popular for live performance is because of the patented Mic Lim technology featured on each input. The Mic Lim circuit limits transients before the preamp, protecting the preamp from clipping and anything later in the signal path from receiving a clipped signal. The DUAL RPA 500 with Mic Lims is perfect for use on snare drum, kick drum or drum kit overhead mics.
>
>
> Professional Studio Recording-The DUAL RPA 500 is a hybrid with a solid state front end for a fast transient response and a tube back end for warmth and gain. It’s the best of both worlds! The ¼” input also makes it easy to run instruments through the mic pre without using a direct box.
>
>
>
>
Radial PreMax

**Radial Engineering PreMax Channel Strip** is a pre-amp and equalizer for the 500 series, manufactured by Radial Engineering.

## Official description

>
> * Combination preamp and 3 band equalizer
> * Accustate gain control for low noise
> * High-pass filter eliminates excessive resonance
> * Dedicated instrument input for direct recording
>
>
> The PreMax is an all-in-one channel strip that combines a low noise mic preamplifier with a state-of-the-art 3 band equalizer to deliver exceptionally clean results each and every time it is used.
>
>
> The design begins with a high performance Op-Amp coupled with Radial's unique Accustate gain control that simultaneously sets the input sensitivity and signal gain to deliver outstanding signal-to-noise at all levels. Visual monitoring is provided with LEDs for signal and overload. The preamp then feeds a traditional 3 band EQ for tone shaping. This musical sounding EQ lets you gently boost the top end for more clarity, add warmth to the bottom end, or cut back the mids on an overly aggressive instrument. A front panel switch lets you bypass the EQ and compare the pre-post effect. This is augmented with a high-pass filter to eliminate low-end resonance that can cause a track to sound muddy or lack detail. A 180° polarity reverse works double duty to either help align a stereo mic setup or enable the PreMax to be interfaced with older vintage gear that may not follow the AES Pin-2 hot convention. For safety, the 48V phantom power switch is recessed to prevent accidental turn-on which could damage tweeters or vintage ribbon microphones. When used with a Radial Workhorse power rack, the Omniport jack is configured as an instrument input and activated using a convenient front panel switch. When the Omniport is not connected, the switch acts like a microphone mute.
>
>
> Designed to deliver quick, dependable results, the PreMax's integrated design eliminates the concern of matching levels between modules. You simply plug in, set the gain, tone shape and start recording. This makes the PreMax the perfect channel strip module for project studios, post production, broadcast and live recording.
>
>
>
>

## References

1. ↑ https://www.gearslutz.com/board/product-alerts-older-than-2-months/844952-radial-engineering-announces-premax-channel-strip.html
BAE 1066DL

**BAE 1066DL** is a pre-amp and equalizer for the 500 series.

## Official description

>
> The new 1066DL is based on the classic 1066, which features the same mic-line pre-amplification stage as the 1073, but features different frequency selections in its EQ for a whole new sonic palette. The available frequencies on the 1066 are especially well suited to guitar applications because of its unique midrange.
>
>
> The 1066DL is completely hand-wired using Carnhill (St. Ives) transformers and has the same mic-line pre-amp as the 1073, with the exception that the 1066DL adds a few different frequencies to your pallet.
>
>
> This unit is popular among guitarists for having a unique mid-range. The original 1066 only had a 10k shelving but this unit offers additional frequencies: 10k Hz,12k Hz,16k Hz, 20k Hz and 24k Hz.
>
>
>
> * High Frequency: +/-16dB shelving with selectable frequencies of 10kHz, 12kHz, 16kHz, 20kHz and 24kHz.
> * Low Frequency: +/-16dB shelving with selectable frequencies of 35Hz, 60Hz, 110Hz &220Hz.
> * Mid Range: +/-16dB peaking with switchable selectable centre frequencies of 700Hz, 1.2kHz, 2.4kHz, 3kHz, 7kHz
> * High Pass Filter: 18dB per octave slope, switchable between 45Hz, 70Hz, 160Hz & 360Hz.
> * EQ Button: Switches the equaliser on or off
> * Phase Button: 180°
>
>
>
IGS Audio Neox 500

**IGS Audio Neox 500** is a pre-amp and compressor for the 500 series, manufactured by IGS Audio.

## History

The IGS Audio Neox 500 was released in 2014.

## Official description

>
> **The Preamp**
>
>
> IGS Audio NEOX 500 is a microphone preamplifier and compressor combo fitted into a single 500-series module, that can work with any API 500 Series compatible rack. It was created using advanced transformerless design, providing low noise signal path, excellent dynamic response, and maintenance free usage for years. Despite the extended functionality (for a single 500-series unit) it still offers the ease of use, through the well laid out front panel.
>
>
> **The Compressor**
>
>
> The preamp section features 60dB of adjustable gain boost, phantom power, phase flip and 70 Hz high pass filter. The compressor section is based on the VCA principle, using highly specialized IC, supported by an external circuitry, that controls the attack and release times. The envelope of the release time consist of two stages – the amount of gain reduction lowers by 80% within the first 150ms and by further 20% within the next 450ms. This unique feature helps the NEOX 500 to behave like an optical compressor. User has an access to the THRESHOLD level knob, RATIO (1:1 to 100:1 – soft compression to hard limiting), OUTPUT level and the bypass switch.
>
>
> **The Metering**
>
>
> Comprehensive metering is also available on the front panel. 5-Led VU meter showing the module output level and 5-Led Gain Reduction meter displaying the amount of signal reduction achieved by the VCA compressor.
>
>
>
>

## References

1. ↑ https://www.gearslutz.com/board/product-alerts-older-than-2-months/940667-igs-audio-500-series-neox-mic-pre.html
TB Audio Model 23N

**TB Audio Model 23N** is a pre-amp for the 500 series, manufactured by TB Audio.

## History

The TB Audio Model 23N was released in 2014.

## Official description

>
> The Model 23N Microphone Preamplifier is designed to be a very high quality, yet affordable and easy to use preamplifier for 500 Series racks.
>
>
> The 23N is comprised of a very low noise transistor based input stage. Following the input stage, and driving the output, are NOS Phillips (Signetics) 5534 op amps. These original 5534s are widely considered to be the best 5534 variant ever made. Not wanting to believe that out of hand, we conducted extensive listening tests against alternative modern versions and the conclusion on blind comparisons is that these op amps have more than earned their reputation. Additionally, all of these parts add up to a quiet preamp. This is usually the very first comment from anyone upon hearing the 23N for the first time.
>
>
> This simple, yet well devised architecture, with carefully selected components, provides everything we wanted in the original design goal: high quality, affordability, and ease of use.
>
>
> Features:
>
>
>
> * 500 Series module
> * Hard gold plated card edge connector
> * High quality and durable aluminum bracket and front panel
> * No cost saving construction shortcuts
> * Gain range 20-55dB, 0-35dB with pad enabled
> * Phase invert switch
> * 48V Phantom power with LED indicator
> * Clip indicator
> * Clean gain to +18dBu
>
>
>

## References

1. ↑ https://www.gearslutz.com/board/product-alerts-older-than-2-months/966775-tb-audio-model-23n-preamp.html
Purple Audio Moiyn

**Purple Audio Moiyn** is a summing module for the 500 series, manufactured by Purple Audio. The module can only be used in the Purple Audio Sweet Ten rack.

## History

The Purple Audio Moiyn was released in 2008.

## Official description

>
> The Moiyn all-discrete 8 channel summing amp
>
>
> **Only for slot 9 of the Purple Audio Sweet Ten.**
>
>
> The Moiyn is an incredible 500 Series module that can turn your Sweet Ten rack into an 8×2 mixer. While using this feature, you are even still able to use each of the first 8 module’s outputs like you normally would, with their own outputs into your DAW or Tape machine. You can set up the Moiyn 8×2 mixer module in 4 easy steps.
>
>
> Simply add any 500 Series modules to slots 1-8 of your Sweet Ten. Make sure that the Moiyn is placed in slot 9 of the rack. You can then assign each module (in 1-8) to either of the 2 outputs by using the buttons on the front of your Moiyn. Finally, use the rotary knob to adjust output volume to your liking!
>
>
> **Our custom hexifiliar output transformers** provide two stereo transformer isolated outputs. One pair of outputs appears on the two output XLRs for slot 9. The Moiyn has internal jumpers to feed the second pair of outputs to slot 10. With the jumpers enabled, you can feed a Cans headphone amp in slot 10 automatically, without patching any cables in the back. Because of the Cans’ bridging transformer inputs, the pair of input XLRs on slot 10 can also be used as a second set of stereo outputs (with the input of the Cans multed to that output).
>
>
> The inputs for slot 9 (XLR IN/OPT IN) serves as a stereo input to the Moiyn mix buss for cascading multiple mixers. As an example: take one Sweet Ten with a Moiyn to do your drum submix and cascade that into a second Sweet Ten with a Moiyn for your whole mix. That’s a fully discrete 16 channel summing mixer in 6 RU, and you can pick almost any combination of 500 modules as the channel modules.
>
>
> The front panel of the Moiyn has two columns of eight illuminated push buttons, for left and right assign for each channel. Tricolor LEDs on either side of the slot 8 assigns show the mixbuss signal level. Below is a high quality 2-buss rotary master fader. The audio signal path of the Moiyn uses the same discrete opamps found in our other modules. The Moiyn uses two KDJ3 opamps and two KDJ4 opamps.
>
>
>
>

## References

1. ↑ https://www.gearslutz.com/board/product-alerts-older-than-2-months/215052-purple-summing-box-500-series.html
AML 54F50

**AML 54F50** is a compressor/limiter for the 500 series, manufactured by AML.

## Official description

>
> **54F50 Compressor / Limiter - API 500 series format**
>
>
> The 54F50 is a Class A, compressor and limiter module which occupies three slots in a 500 series rack. Fully populated with Carnhill transformers to achieve its distinctive classic sound. This high-end hand-built British module provides an affordable solution for the modern cost conscious studio.
>
>
>
> * Classic 4 stage (Class A) amplifier, 4 transformer design
> * All discrete component (no surface mount devices)
> * Entirely hand assembled and tested in the England to exacting quality standards.
> * Line Input: Carnhill transformer balanced (Mu-metal screened Classic VTB9046), 10k Input Impedance
> * Interstage: Carnhill Mu-metal screened Classic VTB9045 and VTB9046
> * Line Output: Carnhill transformer balanced (Classic full size output transformer)
> * Compressor: (Class A) amplifier design
> 	+ Ratio 1.5:1, 2:1, 3:1, 4:1 & 6:1
> 	+ Dual attack speeds (Fast = 5mS, Slow = 25mS) \*
> 	+ Make-up gain 0dB to 20dB in 2dB steps
> 	+ Recovery (release) 400mS, 800mS, 1.6S & Auto
> 	+ Threshold –20dBu to +10dBu
> * Limiter: (Class A) amplifier design
> 	+ Dual attack speeds (Fast = 100uS, Slow = 5mS) \*
> 	+ Recovery (release) 100mS, 200mS, 800mS & Auto
> 	+ Threshold +4dBu to +12dBu (in 1dB steps)
> * Stereo link via either the backplane edge connector, an XLR or both
> * Illuminated meter selectable for input, output or gain reduction metering.
> * Power off signal bypass
> * Entirely stainless steel chassis.
> * Total current consumption 150mA (per unit)
> * Also available supplied as a pair in a box containing a “mono/stereo” switch
>
>
>

## References

1. ↑ https://www.gearslutz.com/board/product-alerts-older-than-2-months/680801-new-product-54f50-compressor-limiter-500-series-format.html
A-Designs EM-Gold

**A-Designs EM-Gold** is a pre-amp for the 500 series, manufactured by A-Designs.

## Official description

> EM-Gold - The EM-Gold’s combination of EM-Silver and EM-Red transformers make for the perfect sounding floor tom. It is also the preamp you should reach for when you want that speaker moving, low/mid thump from heavy guitars. The EM-Gold is ideal for fattening up thin-sounding sources; on mics lacking low mids or upper bass warmth; and mid transients, such as percussion and drums. It also shines on vocals, bass, and even drum machines. If you’re going to move air (the secret of a big sound), go for the Gold.
>
>
Heritage Audio 1073/500 Anniversary Edition

**Heritage Audio 1073/500 Anniversary Edition** is a pre-amp and equalizer for the 500 series, manufactured by Heritage Audio. The Anniversary Edition includes output attenuation (not featured on the standard Heritage Audio 1073/500).

## History

The Heritage Audio 1073/500 Anniversary Edition was released in 2015.

## References

1. ↑ https://www.facebook.com/HeritageAudio/posts/823041014397900
Radial Jensen Twin-Servo

**Radial Engineering Jensen Twin-Servo Microphone Preamplifier** is a pre-amp for the 500 series, manufactured by Radial Engineering.

## History

The Radial Jensen Twin-Servo was released in 2016.

## Official description

>
> * Exceptionally wide frequency response from 0.5Hz to 150kHz
> * Twin-servo topology eliminates capacitors in the signal path
> * Virtually zero phase shift or bandwidth limitation
> * Oversized Jensen transformers for maximum headroom
> * The Radial Jensen Twin-Servo & 500 series preamplifier is an updated version of what may well be the most spectacular preamp ever made.
>
>
> Originally developed by industry icon Deane Jensen in 1988, the Twin-Servo 500 is an adaptation that fits the popular 500 series format. The design begins with the legendary performance of two 100% discrete 990 op-amps cascaded in tandem to deliver 60dB of gain with less than 1/10th the distortion and twice the bandwidth of a single stage design. This maximizes the gain-margin so that no matter what the input, the lowest possible distortion will be realized. This also reduces noise at mid and low levels, a critical advantage for those that record with a wide dynamic range. In order to minimize phase distortion and retain the delicate balance of fundamentals with harmonics, all capacitors have been removed from the audio signal path and replaced by two DC servo feedback circuits. This not only reduces low-frequency noise, but also eliminates the ugly distortions associated with electrolytic capacitors that are especially degrading to low-level microphone signals when used to block phantom power in transformerless designs. To deliver the widest possible bandwidth, Jensen transformers are placed at both the input and output producing a frequency response that extends from 0.2Hz to 150kHz. The transformers further benefit with unmatched common-mode noise rejection from offending devices such as power supplies, light dimmers and motors that may be connected to the same power service.
>
>
> Features include a convenient front-panel Neutrik combo connector with choice of XLR and ¼” inputs, a dual-gang potentiometer for level adjustment along with a 10 segment LED meter for signal management. This is supplemented with a 180º polarity reverse switch that toggles the absolute phase, a gentle high-pass filter to eliminate excessive resonance, a -15dB pad to prevent overload, and a 48V phantom power activation switch.
>
>
> The Jensen Twin-Servo... likely the finest microphone amplifier ever made.
>
>
>
>

## References

1. ↑ https://www.gearslutz.com/board/new-products-coming-soon/1031337-radial-500-series-twin-servo-preamp-2.html