ROTEL RA-311
¥ 27,500 (around 1973)
Commentary
Pre-main amplifier with an emphasis on functionality.
ITL-OTL system is adopted.
Built-in 4-channel speaker matrix.
Model Rating
| Type | Pre-main amplifier |
| Power Amplifier Unit | |
| Music power | 60W (4 Ω) 44W (8 Ω) |
| Effective power | 17W/17W (8 Ω) |
| Harmonic distortion factor (1 kHz) | 0.3% (at 15W output) |
| Intermodulation distortion factor (70 hz : 7 khz = 4 : 1) | 0.4% (at 15W output) |
| Output band characteristic | 20 Hz to 80 kHz |
| Damping factor | 30 (8 Ω) |
| Preamplifier Section | |
| S/N | Phono:60dB Tuner, Aux : 70 dB |
| Input Sensitivity / Impedance | MAG : 2.7mV/50k Ω Aux : 180mV/100k Ω Tuner : 170mV/100k Ω Tape in : 280mV/15k Ω |
| Loudness control | +10dB(50Hz) |
| Tone control | Bass : ± 14 dB (50 Hz) Treble : ± 12 dB (10 kHz) |
| <General> | |
| Semiconductor used | Transistor : 24 Diode : 3 pcs |
| Pwer | AC100V/120V/200V/240V, 50Hz/60Hz |
| External dimensions | Width 350x Height 110x Depth 255 mm |
| Weight | 4.7kg |