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300W Monaural Power Amplifier RPA-MG1000

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300W Monaural Power Amplifier  RPA-MG1000
300W Monaural Power Amplifier RPA-MG1000



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 sound pressure
  • 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 sound full of "musicality" faithfully reproduces the artistry of the performer.

The amplifier is a musical instrument

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

The wooden panels integrated with the amplifier provides beautiful and natural tones in the music. The bottom panel is made 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 and enhance the beautiful natural tones.

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

Only Hickory supports the full weight of the main chassis

Wooden feet of maple wood with hickory embedded in the center are designed in such a way that only the hickory located in the center 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 these minute signals faithfully without exception.

The sounds of violins contain a lot of detailed harmonics.

Complex and miniscule harmonic overtones result in beautiful audio

SPEC takes special concern in the faithful representation of minute audio signals

Music is a Sound Pressure

800VA R-COER TRANSFORMER supplies powerful energy to the speakers to reproduce the sound pressure energy. Sound pressure is the energy of the instrument itself.

A high musical expression capabilities 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, so it is indispensable for music expression. In addition, live musical instruments and voices are giving off strong sound pressure. Sound pressure is exactly the energy of music.

Very small FETs by Infineon Technologies supplies powerful energy directly to the speakers reproducing the sound pressure of the 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 sound with high-speed and highly clear tone. This is possible due to FETs almost completely preventing heat generation. There is no huge heat sink. Only a small heat sink is on the board.

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

Stereophonics represent a stereo image of sound with a slight difference between the left and right signals.

With the reliable reproduction of minute signals, we can feel realistically a three-dimensional effect.

SPEC takes special concern in the faithful representation of minute audio signals

The leading role in musical expression is a minute signal.

SPEC delivers "music" to you in a system that does not compromise on minute signals.


Direct connection at source device level. Conventional, pre-amplifier-based connections are small level connections. For small signals, transmission at a large level is advantageous because, the small signal in the small level signal shrinks further and could disappear completely. PURE DIRECT CONNECTION with Volume Controller is essential for the most fresh and most realistic reproduction.


DAmplifies almost all minute signals with analog attenuator and analog PWM. The SPEC system amplifies the “amplitude” by analog processing, so it can be called an analog amplifier.


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.


1 Neutral: very close to the actual sound of the instruments
2 Sophisticated: Artistic quality beyond the actual sound

It is a quite different method from that of a conventional tone control. Frequency characteristic does not change at all. Each mode is depending on the adopted parts itself.

But isn't that a job for a pre-amplifier? ..No! The class D circuit has a very sensitive point. At the post-stage of CLASS-D, musicality change can be achieved very effectively. We don’t change frequency characteristic, we merely change resonance characteristics of special parts at the post-stage of CLASS D.

"Huge monolith" mica capacitor

Ultrafast soft-recovery diode to make silence

Side panel for the sound (MAPLE)

RPA-MG1000 appearance






Maximum output 300 W × 2 (4Ω), 150 W × 2 (8Ω)
Speaker Impedance 4Ω-16Ω
Frequency response 10 Hz - 30 kHz ±1dB
Line input terminals XLR input: 1 RCA inputs:1
Speaker terminal NO.1,NO2
Power voltage 230V AC, 50 Hz/60Hz
External dimensions
450 mm (width) × 180 mm (height) × 430 mm (depth)
External dimensions
450 mm (width) × 180 mm (height) × 455 mm (depth)
Weight (POWER UNIT) 27 kg
Weight (AMP.UNIT) 18 kg


It is an absolutely natural sound. Natural in such a beautiful way that I only once heard something similar in my room—with the mentioned OnGaku, an icon of tube amplifiers. There is such softness in this sound, such a space, that the listening position disappears, speakers disappear, system disappears—we do not have a feeling that we are dealing with mechanically reproduced music, and simply with music.

And that's because the amplifier seems to be dancing to the music, if I may say so. Almost all the other amplifiers I know, except—literally—a few exceptions, sound clumsy in comparison. Even if they seem more "accurate," more "real." And it doesn't matter what music we listen to...The RPA-MG1000 amplifier is one of the few best amplifiers I've heard, regardless of price, design and brand. It is extremely characteristic. This is the sound of tube amplifiers"

- Review by  High Fidelity

Sometimes we want to listen to our brand new audio setup without having to worry about dragging B&W up two flights of stairs - that's where we come in! Not only are our team experts in high quality AV equipment, they're also professional bodybuilders* who can deliver and install your new toys quickly and efficiently.

Our in-house team can service those in Brisbane, the Gold Coast, and the Sunshine Coast. Give us a call to get an obligation-free quote today!

*the term 'professional bodybuilders' is used here loosely...

Our refund policy operates in a 30-day window - after this time we are unable to accept the product and cannot issue a refund. Don't worry, our products are hand picked from thousands of luxury brands to ensure you are only offered the best of the best so we doubt you'll need to consider this policy at all. If you are concerned about making the wrong decision when it comes to your purchase, please feel free to talk with our team of experts who can advise you on equipment based on your personal music taste, aesthetics, and the layout of your listening room. Still not convinced? Discuss the possibility of a loan (trial period) with our experts and hear the difference yourself.

Our refund policy can be viewed here.

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