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GA-30
Commentary

A4 size pre-main amplifier for space factor and multi-function.

The circuit configuration adopts the pure complimentary service OCL method.

Equipped with an LED function indicator that clearly shows the changed position.
There is also a built-in initialization circuit that always sets the position of the tuner when the power is turned on.

Equipped with microphone mixing circuit, speaker selector switch, low filter and loudness switch.

Model Rating
Type Pre-main amplifier
Effective power 30W + 30W (30 Hz to 20 kHz, 0.05%)
Total harmonic distortion factor 0.05% (at effective output)
Phono maximum allowable input 150mV
S/N (IHF / A network) Phono:75dB
Tuner, Aux, Tape play : 90 dB
Mic:55dB
Input Sensitivity / Impedance Phono : 2.5mV/50k Ω
Tuner, Aux : 130mV/33k Ω
Tape play : 150mV/37k Ω
Mic : 0.1mV/9k Ω
Output Terminal / Impedance Tape rec:150mV
Frequency characteristic Phono : RIAA ± 0.5 dB (30 Hz to 15 kHz)
External dimensions Width 297x Height 78x Depth 240 mm
Weight 4kg