Accuphase A-300 Pair Class A Monoblock Power Amplifier NEW

Accuphase's monophonic high-output amplifiers have been developed through tireless technological development since the company's founding, and have always led the global high-end market, delivering numerous historic products.

The A-300 is a pure Class A monophonic power amplifier, born as the fifth model in the 50th anniversary celebrations and the successor to the A-250, which has been highly praised around the world.

The latest technology is brought together in all circuit and mechanism aspects, and the improved noise characteristics and higher output have expanded the Class A operating range to achieve the highest level of performance and sound quality, reproducing the rich emotions of music.

The ``Double MCS+ circuit'' drives two independent power amplifier units with completely identical circuits in parallel, significantly reducing noise components.

The input section of the ``Instrumentation Amplifier'', which makes up the entire amplification section, is a double configuration of fully discrete circuits, and combined with the exquisite gain distribution with the subsequent stage, has succeeded in achieving an astonishingly high signal-to-noise ratio.

The power amplifier stage is a 20-parallel push-pull configuration of power MOSFETs, and the powerful power supply section is made up of a newly developed high-efficiency large toroidal transformer and a large-capacity filter capacitor, achieving high output, achieving 125W/8Ω, 250W/4Ω, 500W/2Ω, and 1,000W/1Ω Class A operation and ideal constant voltage drive, exceeding the previous model.

In addition, the protection circuit is equipped with a MOS FET switch and edgewise coil, which have excellent sound quality and long-term reliability, and the damping factor is greatly improved by balanced remote sensing, making it possible to maximize the expressive power of the speaker.

The A-300 has a majestic presence and will make a new history as the pinnacle of power amplifiers.

Accuphase A-300 Specifications

Rated output (20Hz to 20kHz, 0.05%)

Normal/Bi-amp connection  1Ω load∗1   1000W/ch

2Ω load   500W/ch

4Ω load   250W/ch

8Ω load   125W/ch

Bridge connection  2Ω load∗1  2000W

4Ω load  1000W

8Ω load  500W

∗1: Music signals only

Total harmonic distortion (20Hz to 20kHz)

Normal/Bi-amp connection    2Ω load   0.05%

4 to 16Ω load   0.03%

Bridge connection  4 to 16Ω load 0.05%

IM distortion

0.01%

Frequency response

Rated output 20Hz to 20kHz (+0,-0.2dB)

1W output   0.5Hz to 160kHz (+0,-3.0dB)

Gain

Normal / Bi-amp / Bridge connection

GAIN switch  MAX  -3dB  -6dB  -12dB

Gain (dB)  28  25  22  16

Load impedance

Normal / Bi-amp connection   2 to 16Ω

(However, 1 to 16Ω is possible only for music signals)

Bridge connection   4 to 16Ω

(However, 2 to 16Ω is possible only for music signals)

Damping factor

Normal / Bi-amp connection 1000 or more

Input sensitivity

Normal/bi-amp connection    Rated output   1.26V

1W output   0.11V

Bridge connection    Rated output   1.26V

1W output   0.056V

Input impedance

Balanced input   40kΩ

Line input   20kΩ

S/N (A weighted, input shorted)

GAIN switch MAX   130dB

GAIN switch -12dB   135dB

Power meter

Type   Logarithmic compression type, with display off function

Display range   -∞ to +3dB

Hold time   1 second/∞ switchable

Power supply

AC100V 50/60Hz

Power consumption

No input 230W

Electrical Appliance and Material Safety Act∗2 485W

8Ω load rated output 340W

Standby 0.3W

∗2: The power consumption according to the Electrical Appliance and Material Safety Act is the power value when the maximum load (2Ω for this unit) of the model is supplied at 1/8 of the output just before clipping.

Maximum external dimensions

Width 465mm x Height 240mm x Depth 515mm

Weight

46.0kg