VICTOR/JVC JA-S11
¥ 29,800 (around 1976)
Commentary
A pre-main amplifier with polished basic characteristics of all circuits for faithful waveform transmission.
The power supply section employs a 2.6 kg transformer and a 6,800 μ Fx2 capacitor to provide a power supply with sufficient margin.
It is equipped with a relay-type protection circuit that does not transmit shock noise to the speakers when the power is turned ON / OFF. It also disconnects the speakers immediately if the mid-point potential of the output stage fluctuates abnormally during operation.
All the amplification stages from the equalizer to the tone control circuit and the PURECON OCL power circuit are controlled by a wide-band negative feedback and are designed with emphasis on transient response.
In particular, the equalizer uses a 3-stage direct-coupled monolithic IC with 12 chips per channel.
Equipped with two types of tape terminals capable of mutual dubbing.
One system is mounted on the front panel.
The wood case is sold separately.
Model Rating
| Type | Stereo pre-main amplifier |
| Effective output (8 Ω, both channels operating) | 30 + 30W (20 Hz to 20 kHz, 0.10% THD) |
| Harmonic distortion factor (1 kHz, 30W) | 0.06% |
| Equalizer characteristics | ± 0.5 dB (RIAA deviation) 150 mv (Maximum Input RMS, 1 khz) |
| PhonoSN ratio (IHF-A) | 75dB |
| External dimensions | Width 390x Height 152x Depth 330 mm |
| Weight | 6.5kg |
| Sold Separately | Wood Case WD-6 (¥ 4,500) |