Audio Database

Image of A-912
Commentary

This is a pre-main amplifier with enhanced power supply, low impedance power amplifier, and wide range so that various and unique speakers can be driven.

The power amplifier uses a discrete method.
By using a discrete method instead of IC, the advantages such as current margin, freedom of parts and circuits, and heat radiation are utilized.

It is equipped with a source direct switch that bypasses the tone control circuit and inputs directly to the power amplifier.
You can choose between a direct position that does not use tone control and a tone position that uses the control function according to your preference.

Two tape terminals are installed, one of which is capable of simultaneously monitoring a 3-head deck.

There are two types of speaker jacks, A and B. You can play A/B independently or simultaneously.
The terminal is screw-type and also supports banana plugs.

Equipped with a loudness switch that increases the impact at low volume.

It comes with a RI system remote control that can control not only amplifiers but also CD players, cassette decks and tuners with the RI mark.

Power cord has polarity display.

Model Rating
Type Pre-main amplifier
Rated output
(CD → SP out, both channels driven)
50W + 50W (4 Ω)
45W + 45W (6 Ω)
40W + 40W (8 Ω)
Dynamic Power 80W + 80W (4 Ω)
70W + 70W (6 Ω)
60W + 60W (8 Ω)
Total harmonic distortion factor CD → SP out, 6 Ω, Rated Output : 0.02%
CD → SP out, 6 Ω, Both channel drive : 0.08%
Phono → Rec out, 3 v output : 0.02%
Cross modulation distortion factor CD → SP out, 6 Ω, Both channel drive : 0.08%
Powerbandwidth 5 Hz ~ 60 kHz (IHF -3dB, THD 0.2%, 6 Ω)
Damping factor (1 kHz) 60 (6 Ω)
80 (8 Ω)
Frequency characteristic 20 Hz to 80 kHz, + 0 -3dB (CD → SP out)
RIAA Deviation (Phono → REC out) 20 Hz to 20 kHz ± 0.5 dB
Input Sensitivity / Impedance Phono : 2.5mV/50k Ω
CD, Line, Tuner, Tape1, 2 : 150mV/50k Ω
Phono maximum allowable input 130 mv (1 khz, THD 0.08%)
REC Output / Impedance 150mV/3k Ω (Phono → REC out)
S/N ratio (IHF-A input short) 100 dB (CD → SP out)
Tone control Bass : + / - 8 dB, 100 Hz
Treble : ± 8 dB, 10 kHz
Loudness 100Hz:+8dB
10kHz:+3dB
Pwer 100 V, 50/60Hz
Power consumption (Electrical Appliance and Material Control Law) 120W
External dimensions Width 455x Height 120x Depth 332 mm
Weight 7.1kg