HITACHI/Lo-D HA-200
¥ 35,000 (around 1974)
Commentary
A pre-main amplifier using LTP transistor developed with Hitachi semiconductor technology in pursuit of low distortion.
Pure complimentary service outputting circuit is adopted.
It is equipped with a circuit breaker to protect the circuit and speakers in case of trouble.
A built-in microphone amplifier allows mixing with other audio sources.
Model Rating
Type | Pre-main amplifier |
Effective output (both channel drive) | 14W + 14W (8 Ω) |
Music Power (IHF) | 36W (8 Ω) |
Distortion | 1% (at effective output) 0.15% at 7W output |
Damping factor | 10 (1 kHz, 8 Ω Load) |
Input Sensitivity / Impedance | Phono1, 2 : 2.5mV/60k Ω Aux, Tuner : 200mV/100k Ω Tape : 245mV/50k Ω |
Recording output sensitivity | Rec out:250mV Din out:40mV |
Signal-to-noise ratio | Phono:60dB Aux, Tuner : 65 dB |
Tone control | Bass : ± 10 dB (100 Hz) Treble : ± 10 dB (10 kHz) |
Filter | +9dB(100Hz) +5dB(10kHz) |
Attachment | Microphone mixing Loudness switch Tape monitor |
Semiconductor used | Transistor : 20 Diode : 8 pcs |
External dimensions | Width 312x Height 105x Depth 245 mm |
Weight | 4.1kg |