Accuphase P-350 (1994)
Stereo power amplifier released in July 1994 with high current output and precision current feedback design.
Overview
The Accuphase P-350 is a stereo power amplifier manufactured by Accuphase Laboratory, Inc., released in July 1994. It delivers 150 watts per channel into 8 ohms and features a robust design focused on high fidelity and natural sound reproduction. The amplifier is listed among Accuphase's "Classic Models Reference," noted for excellent performance, high purity, and natural music playback in a simple design with improved sound quality through natural energy response.
Specifications
| Power Output (stereo) | 150W/ch into 8Ω, 180W/ch into 6Ω, 210W/ch into 4Ω |
| Power Output (monaural, bridged) | 420W into 8Ω, 300W into 16Ω |
| Total Harmonic Distortion | 0.02% (20Hz–20kHz, 4Ω–16Ω load) |
| Frequency Response | 20Hz–20kHz ±0.2dB; 0.5Hz–160kHz –3dB at 1W |
| Damping Factor | 360 (stereo), 180 (monaural bridged) |
| Input Sensitivity (8Ω) | 1.38V (full output), 0.11V (1W output) |
| Input Impedance | 20kΩ unbalanced, 40kΩ balanced |
| Gain | 28.0 dB (stereo and monaural) |
| Power Consumption | 65W (idle), 300W (rated per Electrical Appliance Law), 490W (at 8Ω full output) |
| Dimensions | 475 mm (W) × 170 mm (H) × 435 mm (D) |
| Weight | 23.6 kg |
| Power Supply | 100 VAC, 50/60 Hz |
Design
The P-350 uses a current feedback amplifier circuit with the balanced input connected directly to the non-inverting (+) and inverting (–) inputs of the input stage. The output stage employs four parallel high-power multi-emitter transistors rated at 100W collector loss and 10A collector current. It features a 700 VA power transformer, two 40,000 μF/71WV aluminum electrolytic capacitors (2.8 coulombs total charge capacity), and gold-plated copper foil on the printed circuit board. Input terminals are gold-plated, and the amplifier includes large machined brass speaker terminals supporting banana plugs and bi-wiring. It can be configured for monaural use via bridge connection.
Market
Used units were listed at €1,700 on Subito (October 21, 2025), PLN 19,650 on OLX Poland (October 9, 2025), and €4,448 on Kleinanzeigen (May 4, 2025).
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