HA-300
| Brand | Hitachi |
| Function | Amplifier, Integrated |
| Produced | 1974 |
| Country | Japan |
| Model ID | HA-300 |
| Form Factor | Tabletop |
| Signal Path | Analog Hardware |
| Weight | 6.7kg |
| Power | 20W 20W + (8Ω) |
| Frequency Response | 52W (8W) |
| Effective output (both ch driven) | 20W + 20W (8Ω) |
| Music power (IHF) | 52W (8W) |
| Damping factor | 55 (1kHz, 8W) |
| Tone control | ±10dB (100Hz) (Bass) |
| Tone control | ±10dB（10kHz） (Treble) |
| Connections |
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| Links | audio-heritage.jp/ |
| Notes | Integrated Amplifier which has been developed by introducing semiconductor technology of Hitachi. Has adopted a two-power pure complimentary OCL circuit, it has to allow for broadband playback. The equalizer circuit has adopted the low noise IC, it has won a wide dynamic range and high SN ratio. It is equipped with a speaker switching function. It is equipped with a microphone mixing circuit. |