Accuphase A-300 Monophonic Class A Power Amplifier
Created to mark our 50th anniversary, the A-300 redefines the ideal for Class A power amplifiers. 20-parallel push-pull power MOS-FETs in the output stage improves performance by 25% over conventional models with outputs of 125 W into 8 ohms, 250 W into 4 ohms, 500 W into 2 ohms, and 1,000 W into 1 ohm that set the stage for enviable constant-voltage drive. The fully discrete balanced input amplifier achieves a level of quietness that will make you forget you are using audio equipment for reproduction. The A-300’s unmatched expressiveness lets you enjoy the most exquisite pieces from the world’s greatest composers.
- Class A driven output stage with 20-parallel push-pull power MOS-FETs
- Large linear output 125 W / 8 ohms, 250 W / 4 ohms, 500 W / 2 ohms, 1,000 W / 1 ohm
- Instrumentation amplifier principle
- Current feedback amplification circuits
- Balanced Remote Sensing
- Double MCS+ circuit
- High damping factor of 1,000
- Speaker output protection
- Highly reliable MOS-FET switches with no mechanical connections
- Signal input section with a fully discrete configuration for low noise
- Highly responsive large-scale bar graph power meter
- Connecting two pairs of A-300 supports bi-amping and bridged mode connection
- 4-step gain control
- High capacity 100,000 μF filtering capacitors
- Large speaker terminals connected directly to protection circuitry
- High-carbon cast iron insulator feet with superior damping characteristics
- Power amplification section on circuit boards using glass cloth fluorocarbon resin
- Aluminum hairline finish top plate
Specs
Continuous Average Output Power: 125 watts (8 ohms), 250 watts (4 ohms), 500 watts (2 ohms), 1,000 watts (1 ohm, music signal) / Bridged operation (2 units): 500 watts (8 ohms), 1,000 watts (4 ohms), 2,000
watts (2 ohms, music signal)
Frequency Response: 0.5 Hz – 160 kHz +0 dB, –3.0 dB
Intermodulation Distortion: 0.01% or less
Damping factor: 1,000 or more (JEITA, 8-ohm load, 50 Hz)
S/N Ratio: 130 dB (GAIN: MAX), 135 (GAIN: –12 dB) (A-weighted)
Rated Input: 1.26 V