Product: SUCA-AUDIO Phono Preamp for Turntable MM Phonograph Preamplifier with Gain Adjustable Function Stereo Hi-Fi Pre-Amplifier for Recorder Player, Come with DC 12V Power Supply
Brand: SUCA-AUDIO
Color: Black
SUCA AUDIO BOX P4 is a 2-in-1 Phono preamp / tube preamplifier for your home stereo.

 You can connect your phono/turntable to it using the MM RCA plug that has a ground wire.(You cannot connect a turntable to a receiver without PHONO Preamp in because the signal from the turntable is low and needs a preamp for turntable)

 OR you can connect your music player like your smartphone, your MP3 player, CD player or other other audio component using the 3.5mm plug AUX input.

 Then connect the preamp to your amplifier that is connected to your speakers.

 This is great for a newer receiver that does not have Phono plugs since it is RIAA compliant.

 Or it can work with an older stereo receiver and will provide that warm tube sound. 

 Have a question?
 Q) I am getting humming noise from the speakers, how can I fix this?

 A) - The RCA inputs were used to connect another device however these are RIAA MM inputs and that means it can only connect to a turntable

 - The ground wire is not connected properly- this is a likely cause of the problem and the first thing you should check

 - Cables are not connected securely - you need to push the cable into the connectors until properly seated, a bad connection may cause hum noise

 - Wi-fi interference - all tube products - not just ours - are vulnerable to line noise from wifi signals so you may need to set up your system away from your Wifi access point

 - Cable crossover - if audio cables cross over power cables there may be line interference from the power lines so make sure they do not overlap

 - Poor quality cables - cables are not created equal, some offer better shielding than others so invest in high quality cables as inexpensive ones may be causing line noise

 Package Include
 1 * MM PHONO Preamp
 2 * 6A2 Vacuum Tubes
 1 * RCA Cable
 1 * Power Adapter
 1 * User Manual
【Tube Preamplifier for Turntable】: Converts phono signals to Line Level Signals with low-noise integrated circuits and high-quality components to remove low-frequency noise ensure clear sound quality. Designed with grounding post to protect your turntable.
【2 in 1 Turntable Preamp】: With MM signal input and 3.5mm AUX input(with priority). It can be used as an MM phono preamp and a tube preamp. Compatible with many audio devices such as MM record player, phone,TV, MP3 players, CD players, DAC, computers etc. to satisfy different demands.
【Gain Adjustable Design】: 39/42/45 dB gains levels switchable,different output gain is convenient to match different audio signal better, give a customizable control and great listening experience.
【Vacuum Tubes Replaceable Design】: Tubes can be replaced by 6K4 / 6J1 / 6J4 / GE5654 / 6AK5 / 6*1n and ect, you can DIY your stereo ststem with different tubes. sound warm, dynamic and sweet, bringing extremely high-quality listening experience.
【What You Get】: Box P4 phono preamp x1, 6A2 Vacuum tubes x2, RCA cable x1, DC 12V Power Supply x1, user manual x1, 18-Month global warranty, and 24-Hour quick customer service.

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