Description
Accuphase A-300 Class A Power Amplifier
The Flagship of Accuphase Class A Amplification
Created to celebrate Accuphase’s 50th anniversary, the A-300 redefines excellence in Class A power amplification. Its output stage features 20-parallel push-pull power MOS-FETs, delivering exceptional linearity and power handling far beyond conventional models. With outputs of 125 W into 8 ohms, 250 W into 4 ohms, 500 W into 2 ohms, and a staggering 1,000 W into 1 ohm, the A-300 achieves true constant-voltage drive. This amplifier is not just powerful—it is emotionally expressive, reproducing music with exquisite detail and dynamic control.
Designed for Ultra-Low Noise and Maximum Musicality
The A-300’s input stage employs a fully discrete balanced amplifier design based on the instrumentation amplifier principle, ensuring extreme quietness and signal purity. Current feedback amplification and Double MCS+ circuitry maintain clarity and speed across the frequency spectrum, while Balanced Remote Sensing and a high damping factor of 1,000 ensure superior speaker control. Every musical nuance is delivered with authority and refinement.
Masterfully Engineered Inside and Out
The A-300 is built with uncompromising materials and precision architecture. Large-capacity 100,000 μF filtering capacitors and robust speaker terminals deliver stable, clean power. A striking large-scale bar graph power meter visually tracks output, and the amplifier’s protection circuitry ensures reliability. The aluminum hairline-finish top plate, high-carbon cast iron insulator feet, and glass cloth fluorocarbon resin circuit boards reflect the dedication to both sonic and physical craftsmanship.
Key Features
- Class A output stage with 20-parallel push-pull power MOS-FETs
- Power output: 125 W / 8 ohms, 250 W / 4 ohms, 500 W / 2 ohms, 1,000 W / 1 ohm
- Instrumentation amplifier principle for ultra-low noise
- Current feedback amplification circuits and Double MCS+ design
- Balanced Remote Sensing and a high damping factor of 1,000
- Highly reliable MOS-FET switches with no mechanical connections
- Fully discrete balanced signal input section
- Large, responsive bar graph power meter
- 4-step gain control for optimal system matching
- Supports bi-amping and bridged mode with dual A-300 units
- High-capacity 100,000 μF filtering capacitors
- Speaker terminals connected directly to protection circuitry
- Glass cloth fluorocarbon resin circuit boards for low dielectric loss
- High-carbon cast iron insulator feet for vibration control
- Premium aluminum top plate with hairline finish
