CORAL A-707
¥ 39,200 (around 1965)
Commentary
A solid-state pre-main amplifier using a mesa silicon power transistor.
The circuit configuration uses the SEPP full OTL circuit system.
The power transistor is protected by an all-electronic protective device (E. P. C.).
A tape head direct input terminal, a headphone jack, and various filter circuits are also mounted.
The tone control is installed separately on the left and right.
Model Rating
| Type | Stereo pre-main amplifier |
| Effective power | 70W(35W+35W) |
| Music power | 110W(55W+55W) |
| Frequency characteristic | 20 Hz to 35 kHz ± 1 dB |
| Input sensitivity | Player:3mV Tape Head:1.5mV Tuner, Aux, Tape Monitor : 400 mv |
| Equalizer | Player : RIAA curve Tape Head : NAB curve |
| Tone control | CR Type Bass : ± 14 dB (50 Hz) Treble : ± 11 dB (10 kHz) |
| Loudness control | 100Hz:+8dB 10kHz:+8dB |
| Accessory circuit | Tape recorder DIN connector Headphone jack Tape monitor circuit Power transistor protective device High filter Low filter |
| Semiconductor used | Transistor : 23 Diode : 8 pcs Thermistor : 1 Piece |
| Power supply voltage | 100 VAC / 117 V, 50Hz/60Hz |
| Power consumption | 17W (no signal) 160W at maximum output |
| External dimensions | Width 380x Height 135x Depth 280 mm |
| Weight | 8.6kg |