Commentary

An amplifier developed as a top-of-the-line control center with the utmost luxury.

A symmetrical class A push-pull driving circuit is used for all the amplification stages from the input to the final output stage of the equalizer, including the filter amplifier and headphone amplifier. Since the push-pull circuit has excellent elementary characteristics before NFB is applied, excellent total characteristics can be obtained with a small amount of NFB.

The output stage of the equalizer uses a class A push-pull ring emitter transistor (RET), newly developed for high-frequency power amplification.
This RET has a structure in which 100 small-signal transistor units are arranged in parallel and rigid through ballast resistance of the emitter by the diffusion layer. This enables power amplification while maintaining the excellent high-frequency characteristics of small-signal transistors.
In addition, the output impedance is lowered by passing a large current, which makes it possible to lower the impedance of the NFB loop and improves SN.

Equipped with a DISC level attenuator that can be continuously varied by 10 dB.
The input impedance of DISC1 can be switched to three stages.

Sound quality and noise of individual parts are strictly examined, and long-term stability is also adopted with sufficient margin as well as endurance tests.

It is equipped with a tone control with two transition points for both low and high frequencies. It can be adjusted in steps with an 11-contact rotary switch.
It is also equipped with a tone switch that can turn the tone on / off to obtain a flat characteristic.

Equipped with a -20dB attenuator for muting.

The headphone amplifier has a dedicated amplifier directly connected to pure complimentary service.

It is designed so that two of the tape inputs and outputs can be dubbed each other by providing a Route 3.
In addition, the copy switch can be made independent so that the tape recorders can copy each other while listening to other program sources.

It is equipped with a low enhancement circuit that finely adjusts the presence, and it is possible to correct the sense of volume.

There is a special relay box sold separately and you can switch the speaker system with the speaker selector switch in the front panel.
Also, there was a case sold separately with a walnut finish.

Model Rating

Type	Stereo Control Center
Frequency Response	High level input : 20 Hz to 20000 Hz, + 0 -0.2 dB DISC input : 20 Hz to 20000 Hz, ± 0.2 dB
Harmonic Distortion Factor	0.01% (20 Hz to 20 kHz at rated output)
Input Sensitivity / Input Impedance	DISC1 : 2 ~ 6mV/30k Ω, 47k Ω, 100k Ω DISC2 : 2 ~ 6mV/47k Ω MIC : 2mV/47k Ω Tuner, AUX1, 2, Front, Tape Play1, 2, Front : 200mV/47k Ω
Rated Output / Output Impedance	Main Output : 2.0V/200 Ω (maximum volume at rated input) Tape Rec Output1, 2, Front : 200mV/200 Ω
Maximum Power Level	10 v or more (0.01% distortion rate, 20 Hz to 20 kHz)
Disk Max Input	400 mv ~ 1.2 vrms (1 khz, 0.01% distortion) * 400 mv : DISC level control maximum (equalizer gain 40 db) * 1.2 v : DISC level control minimum (equalizer gain 30 dB)
Minimum Load Impedance	Output : 5.0k Ω Tape Rec : 10.0k Ω
Gain	From the Tuner, AUX and Tape Play inputs Tape Rec Output: Output: Headphone: 0dB 20dB 16dB From DISC1, 2 and MIC input Tape Rec Output: Output: Headphone: 40dB 60dB 56dB DISCS 1 and 2 have level adjustment, adjustable to -10dB
S/N / Input Conversion Noise (rated input, IFF-A, input short)	High level input : 106dB/-120dBV DISC, MIC : 81dB/-135dBV
Volume Adjustment Interlock Error	within 1 dB
Tone Controls	Low : Change Point 400 Hz : 200Hz: ± 10 dB (100 Hz) ± 10 dB at 50 Hz High : Change point 2.5 kHz : 5kHz: ± 10 dB at 10 kHz ± 10 dB at 20 kHz Each 2 dB step
DISC low enhancement (volume compensation circuit)	0 dB, + 0.5 dB, + 1 dB (100 Hz) from the RIAA reference characteristic
Attenuator	-20dB
Compensator (volume control -30dB)	50 Hz, 250 Hz : + 9 dB
Filters	Subsonic Filter : 17 Hz, 18dB/oct High Filter : 8 kHz, 12dB/oct
Headphones	Output impedance : 0.3 Ω Output (8 Ω load) : 0.8W (1 kHz, 0.03% distortion)
Semiconductors used	Transistors FET : 8 Diode : 28
Power Supply	100 VAC / 117 V / 220 V / 240 V, 50Hz/60Hz
Power Consumption	60W
External Dimensions (including legs)	445 mm wide x 160 mm high x 355 mm deep
Weight	14kg
Sold Separately	Relay box R-1 (¥ 12,000) Wood Case A-2 (¥ 15,000)