Accuphase P-300 Power Amplifier (1970s)
The Accuphase P-300 is a flagship stereo power amplifier from the 1970s, representing the ultimate expression of Accuphase's power amplifier design philosophy.
Overview
Designed as part of Accuphase's flagship separates system, the P-300 delivered exceptional power and control. When paired with the C-200 preamplifier, it formed a reference-grade amplification system that competed with the best equipment from around the world.
Specifications
| Model | P-300 |
| Era | 1970s |
| Type | Stereo Power Amplifier |
| Power Output | 150 watts per channel (8 ohms) |
| Power Output | 200 watts per channel (4 ohms) |
| THD | < 0.03% |
| Frequency Response | 20Hz - 20kHz (+/- 0.2dB) |
| Damping Factor | > 100 |
| Dimensions | 445 x 180 x 380mm (W x H x D) |
| Weight | 25 kg |
| Impedance | 8 ohms |
| Power Supply | large heavy-duty power transformer, 2 × 40,000 µF filter capacitors |
Construction
The P-300 features exceptional construction:
- Dual-mono design - Completely separate channels
- Massive power supply - 1000VA toroidal transformer
- High current capability - Drives difficult loads with ease
- Thermal management - Large heatsinks for stable operation
- Protection circuits - Comprehensive safety systems
Performance
The P-300 delivers reference-grade performance:
- Exceptional bass control and extension
- Effortless dynamics
- Wide, stable soundstage
- Vanishingly low distortion
- Silent background
Pairing
The P-300 was designed to work with:
- C-200 preamplifier (ideal match)
- High-efficiency and low-efficiency speakers
- Complex crossover networks
- Long cable runs
Legacy
The P-300 established Accuphase's reputation for power amplifier excellence. Its design influenced all subsequent Accuphase power amplifiers.
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Service Manuals & Schematics
- Manual — archive.org
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- Accuphase A-20
- Accuphase A-20V
- Accuphase A-45
- Accuphase A-50V
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- Luxman SQ-38U (1975)
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