300W MONAURAL POWER AMPLIFIER

RPA-MG1000
To people who want to feel “MUSIC”.

And, to people who feel the followings.
who want to feel the sound pressure of base more.
who feel that the sound of a violin should be softer and more
comfortable
who think trumpet or human voice should feel more soundpressure
who think live music should be smoother and more transparent,
not harsh.
who want to feel the natural three-dimensionality of the stage.
who don't prefer about being different from the live tone.
who don't want fine sounds to be mixed into large particles.

Unprecedented realistic stage,

RPA-MG1000 frees you from such worries.
We aim to manufacture best amps to experience music. The soundfull of "musicality" faithfully reproduces the artistry of theperformer.

20190911

The amplifier isa musical instrument
The most important concept of SPEC is "the amplifier is a musicalinstrument".

The wooden panels integrated with the amplifier provides
beautiful and natural tones in the music. The bottom panel ismade of thick SPRUCE wood, which is the same material used as
the front panel of a violin. The side panels are made of MAPLE
wood, similar to backside of a violin. They vibrate with music andenhance the beautiful natural tones.

Like a musical instrument maker, we carefully selected materials
and considered different combinations.

Only Hickory supports thefull weight of the mainchassisWooden feet of maple wood with hickory embedded in the centerare designed in such a way that only the hickory located in thecenter is grounded.
The RPA-MG1000 is built as an instrument.

Music is a tone color
The sounds of instruments and human voice contain an enormous
amount of detailed harmonic signals, which form a beautiful sound.
The PURE DIRECT SYSTEM of RPA-MG1000 amplifies all theseminute signals faithfully without exception.

The sounds of violins contain a lot of detailed harmonics.

Harmonics(Oboe)

Harmonics(Violin)

Complex and miniscule harmonic overtones result in beautifulsound. Therefore,

SPEC takes special concern in the faithfulrepresentation of minute audio signals.

Music is a Sound Pressure

800VA R-COER TRANSFORMER supplies powerful energy to thespeakers to reproduce the sound pressure energy. Sound pressureis the energy of the instruments itself.

Custom-made electric field capacitor for strong low-frequency
energy.

High musical expressioncapabilities based on Class D

300W FETs and PWM controller
Music signals are always changing sharply, so it is important to
MOVE and STOP the speakers sharply and accurately for music
expression. Class D method has high dynamic drive capability, soit is indispensable for music expression.
In addition, live musical instruments and voices are giving off
strong sound pressure. Sound pressure is exactly the energy ofmusic.

Very small FETs by Infineon Technologies supplies powerfulenergy directly to the speakers reproducing the sound pressure ofthe instrument. That's because Class D works just as a switch
instantaneously. Sound pressure is the energy of the instrument
itself. Additionally, simple and small circuit enables the soundwith high-speed and highly clear tone. This is possible due to FETs
almost completely preventing heat generation. There is no hugeheat sink. Only a small heat sink is on the board.

Not only for timbre expression but
also for spatial expression, theleading role is minute signal.

Stereophonics to express space of three-dimensional sound with aslight difference between the left and right signals. With thereliable reproduction of minute signals, we can feel realistically athree-dimensional effect. Therefore,

SPEC takes special concern in the faithfulrepresentation of minute audio signals.

The leading role in musicalexpression is a minute signal.
SPEC delivers "music" to you in a system that does notcompromise on minute signals.

PURE DIRECT CONNECTION
Direct connection at source device level.
Conventional, pre-amplifier-based connections are small level
connections. For small signals, transmission at a large level isadvantageous because, the small signal in the small level signal
shrinks further and could disappear completely. PURE DIRECTCONNECTION with Volume Controller is essential for the most
fresh and most realistic reproduction.
ANALOG SYSTEM
amplifies almost all minute signals with analog attenuator andanalog PWM. The SPEC system amplifies the “amplitude” byanalog processing, so it can be called an analog amplifier.
CLASS D POWER STAGE
The CLASS D POWER STAGE absorbs the Counter electromotive
force and drives the speakers accurately with its very low
impedance.

The Class D FET (under the heat sink) and the low pass filter
placed very close to the FET.

"Huge monolith" mica capacitor

Ultrafast soft-recovery diode to make silenceRPA-MG1000 appearance

AMP UNIT
POWER UNITAMP UNIT

POWER UNIT

SPECIFICATIONS

Volume Controller H-VC1000

For Pure Direct connection

SPEC