Accuphase A-300

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

SPECIFICATIONS

Continuous Average Output Power: Normal mode 1000 watts into 1 ohm, 500 watts into 2 ohms, 250 watts into 4 ohms, 125 watts into 8 ohms. Bridged mode (2 units) 2,000 watts into 2 ohms, 1000 watts into 4 ohms, 500 watts into 8 ohms.

Total Harmonic Distortion: 0.05% with a 2-ohm load, 0.03% with a 4 to 16-ohm load

Intermodulation Distortion: 0.01%

Frequency Response At rated continuous average output: 20 - 20,000Hz ＋0 －0.2 dB, At 1 watt output: 0.5 - 160,000Hz ＋0 －3.0 dB

Gain: 28.0 dB (GAIN selector in MAX position)

Gain Selection: MAX, –3 dB, –6 dB, –12 dB

With music signal: 1 to 16 ohms

Damping Factor: 1,000 or greater

Input Sensitivity: 1.26 V for rated continuous average output (with 8-ohm load), 0.11 V for 1 watt output

Input Impedance Balanced: 40 kilohms

Line: 20 kilohms

Signal-to-Noise Ratio: 127 dB (GAIN selector in MAX position)

Output Level Meter Digital power meter range selection: AUTO / 10 W / 100 W / 1,000 W

Power Requirements: 120/220/230 V AC, 50/60 Hz

Power Consumption: 230 watts idle, 270 watts in accordance with IEC 60065

Maximum Dimensions: Width 465 mm, Height 240 mm, Depth 515 mm

Mass: 46.0 kg net, 55.0 kg in shipping carton