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Quad II-80 Mono Valve Amplifier
Technical specifications
| Rated Power Output | 80W RMS |
| Frequency Response | 10Hz - 30kHz (+0dB/-0.5dB) |
| Total Harmonic Distortion (THD) | 0.5% at 80W (at 700Hz) |
| Residual Hum and Noise | Better than -94dB |
| Damping Factor | 16 at 1kHz |
| Power Consumption | 180W Maximum |
| Loudspeaker Tags | 4 Ohm and 8 Ohm |
| Input Valves | 2 x 6SL7 |
| Output Valves | 4 x KT88 |
| Rectifier Valve | 1 x 6SN7 |
| Sensitivity | 1V RMS |
| Colour | Lancaster Grey |