ROTEL RA-315
¥ 26,900 (around the early 1970 s)
Commentary
Pre-main amplifier of all-transistor configuration using ITL and OTL system.
Uses ITL and OTL power circuits using silicon transistors.
Equipped with a signal source indicator that can confirm the selected source.
Two pairs of speakers can be connected.
Equipped with a tape monitor switch, loudness control and tone control.
It is equipped with an input terminal which can use 2 sets of phono of magnetic cartridge and ceramic cartridge.
It has a headphone port.
Model Rating
| Type | Pre-main amplifier |
| Music Power (IHF) | 60W (4 Ω) 44W (8 Ω) |
| Effective power | 17W/17W (8 Ω) |
| Harmonic distortion factor (1 kHz) | 0.3% (15W output) 0.2% (1W output) |
| Intermodulation distortion factor (70 hz : 7 khz = 4 : 1) | 0.4% (15W output) 0.3% (1W output) |
| Frequency characteristic | 15 Hz ~ 90 kHz + 0 -3dB |
| Output Bandwidth Characteristics (IHF) | 20 Hz to 80 kHz |
| Damping factor | 30 or More (8 Ω) |
| Rise time | Aux : 4 μ s (10 kHz) |
| Overloading | Phono:50mV(1kHz) |
| S/N | Phono : 60 dB or more Tuner, Aux : 70 dB or higher |
| Residual noise | 2 mV or less |
| Input Sensitivity / Impedance | Mag : 2.7mV/50k Ω Aux : 90mV/2M Ω Tuner : 170mV/100k Ω Aux : 180mV/100k Ω T. in : 280mV/15k Ω |
| Tone control | Bass : ± 14 dB (50 Hz) Treble : ± 12 dB (10 kHz) |
| Loudness control | +10dB(50Hz) |
| Speaker impedance | 4 Ω ~ 16 Ω |
| Semiconductor used | Transistor : 24 Diode : 3 pcs |
| Power supply voltage | AC100V/120V/200V/240V, 50Hz/60Hz |
| Power consumption | 117VA |
| External dimensions | Width 358x Height 120x Depth 241 mm |
| Weight | 4.7kg |