HITACHI/Lo-D HA-400
¥ 49,000 (around 1974)
Commentary
This is a pre-main amplifier with low distortion and low noise by using transistors based on Hitachi's semiconductor technology.
Uses carefully selected Hi-Fi dedicated silicon transistors.
It is equipped with two tape monitors and two speaker outputs.
Microphone mixing is possible.
Model Rating
| Type | Pre-main amplifier |
| Effective output (both channel drive) | 15W + 15W (8 ohm, 1 khz) |
| Music Power (IHF) | 40W (8 Ω) |
| Distortion factor | 1% (at effective output) 0.08% at 10W output |
| Damping factor | 40 (1 kHz, 8 Ω Load) |
| Input Sensitivity / Impedance | Phono1 Low : 2.5mV/50k Ω Phono1 High : 6mV/50k Ω Phono2 : 2.5mV/50k Ω Aux, Tuner : 170mV/100k Ω Tape1, 2 : 145mV/100k Ω |
| Recording output sensitivity | Rec out:145mV DIN out:35mV |
| Signal-to-noise ratio | Phono:65dB Aux, Tuner : 70 dB |
| Tone control | Bass : ± 10 dB (100 Hz) Treble : ± 10 dB (10 kHz) |
| Filter | -6dB at 10 kHz, 12dB/oct. |
| Attachment | Speaker switching 2 AC Outlets Tape deck 2 systems can be connected (dubbing possible) Microphone mixing |
| Semiconductor used | Transistor : 26 Diode : 11 units |
| External dimensions | Width 418x Height 137x Depth 316 mm |
| Weight | 7kg |