Accuphase Laboratory A-300 Monophonic Power Amplifier
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- Description
- Specifications
- Reviews
Created to mark Accuphase’s 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
|
Rated Output (Mono) |
125 W into 8 Ω; 250 W into 4 Ω; 500 W into 2 Ω; 1,000 W into 1 Ω |
|
Amplifier Class |
Pure Class A |
|
Output Devices |
20-parallel push-pull MOSFETs |
|
Damping Factor |
≥ 1,000 |
|
Signal-to-Noise Ratio |
130 dB (MAX), 135 dB (–12 dB gain) |
|
Total Harmonic Distortion |
0.01% |
|
Frequency Response |
0.5 Hz–160 kHz (+0/–3 dB) |
|
Inputs |
Balanced XLR and Unbalanced RCA |
|
Gain Settings |
MAX, –3 dB, –6 dB, –12 dB |
|
Input Sensitivity |
1.26 V for rated output |
|
Input Impedance |
40 kΩ (balanced), 20 kΩ (unbalanced) |
|
Dimensions (W × H × D) |
465 × 240 × 515 mm (18.3″ × 9.4″ × 20.3″) |
|
Weight |
46 kg (101.5 lbs) |