The document is a user manual for a power amplifier, which introduces the control device and functions, front and rear panels, speaker impedance, and speaker connection precautions of the amplifier.
This Yamaha manual provides detailed safety precautions, installation instructions, and operating guidance for the P4500, P3200 and P1600 power amplifier series. It explains front‑panel controls, rear‑panel connectors, wiring options (stereo, parallel and bridge), and recommended ventilation and mounting methods.
The document also lists the technical specifications for each model, including power output levels, frequency response, distortion figures, and recommended speaker impedance. Troubleshooting tips and maintenance procedures are included to help users keep the amplifiers running reliably.
| Power Output (Stereo) – P4500 | 460 W + 460 W |
|---|---|
| Power Output (Bridge) – P4500 | 1240 W |
| Frequency Response (Stereo) – P4500 | 20 Hz – 20 kHz |
| Input Impedance (Balanced) | 30 kΩ |
| Dimensions (W×H×D) | 480 mm × 103.5 mm × 455 mm |
The temperature indicator lights red when the heat‑sink temperature exceeds 85 °C, warning of possible overheating.
In stereo mode each channel (A and B) uses its own input and output connectors; connect the left speaker to channel A and the right speaker to channel B.
The minimum speaker impedance for bridge mode is 8 Ω.