Audio Database


This is a pre-main amplifier equipped with a newly developed PCC system to bring out the essence of records.

The PCC (Phono Crosstalk Canceler) is a device that adds reverse crosstalk to the Phono Pickup type crosstalk and cancels it out. By using the attached adjustment record to operate two knobs, it is possible to improve the frequency range most easily perceived by the ear to approximately -40dB.

The power amplifier section is composed of a direct-coupled OCL circuit for all stages of differential amplification. It is composed of a low-impedance power supply circuit, and new power transistors such as double epitaxial structure and triple diffusion structure are adopted for the output final stage respectively.

To protect the speakers from errors and accidents, it has a built-in protection circuit with extremely fast response time and high reliability.
In consideration of the effect on sound quality, we have adopted a relay with a special structure.

In order to improve crosstalk caused by interference between channels, mutual interference is reduced by a circuit configuration in which two circuits are separated, and by disconnecting the power supply of a power circuit with high current and the power supply of a preamplifier circuit with low current.

To prevent the small signal sent from the record player from being degraded by wiring or changeover switches, one phono input circuit is used and the input terminal is directly connected to the equalizer amplifier.
This reduces the shielding wire and stray capacitance and improves the input impedance.

In order to improve dynamic crosstalk, a 3-power transformer system is used for the power supply.

Model Rating
Type Pre-main amplifier
Power Amplifier Unit
Circuit system DC-DC pure complimentary service OCL circuit
Dynamic Output (IHF) 220W (110W + 110W, 8 Ω)
Rated output (both channel drive, sine wave continuous output
20 Hz to 20 kHz)
85W + 85W (4 Ω)
70W + 70W (8 Ω)
Total harmonic distortion factor (Main in → SP out) 0.05% or Less (at Rated Output)
0.02% or Less (at 1W output)
Cross modulation distortion factor
(60 Hz : 7 kHz = 4 : 1, Main in → SP out)
0.05% or Less (at Rated Output)
0.02% or Less (at 1W output)
Output Bandwidth (IHF, both channel drives) 5 Hz to 50 kHz
Transmission frequency characteristic 5 Hz ~ 100 kHz + 0 -1dB or less
Input Sensitivity / Impedance 1Vrms/50k Ω ± 10% (20 Hz to 20 kHz)
Signal-to-noise ratio (IHF, A-network, input short) 116 dB or more
Output impedance 0.16 Ω or less
Output terminal Speaker AORb : 4 Ω ~ 16 Ω
Speaker A + B : 8 Ω ~ 16 Ω
Headphone port
Preamplifier Section
Input Sensitivity / Impedance Phono : 2.5Vrms/50k Ω
Tuner, Aux, Tape1, 2 : 150mVrms/85k Ω
Phono maximum allowable input (Phono → Rec out) 230 mVrms or More (1 kHz)
Total harmonic distortion rate (1 kHz) Phono → Rec out : 0.008% or less (at 3 vrms output)
0.1% or Less (Maximum Output)
Aux → Pre out : 0.008% or less (at rated output)
RIAA deviation 20 Hz to 20 kHz ± 0.2 dB
Output Level / Impedance Pre-out (load 50k Ω or more) : 1 Vrms (rated), 10 Vrms (maximum)
Rec out : 150mVrms/50k Ω or more
Frequency characteristic 5 Hz ~ 100 kHz + 0 -1dB at Tone Defeat
Tone control Bass : 50 Hz ± 10 dB
Treble : 20 kHz ± 10 dB
Filter characteristic Low : 20 Hz, 6dB/oct.
High : 7 kHz, 6dB/oct.
Muting -10, -20dB
<PCC Part>
Maximum allowable input 14Vrms
Post-cancellation phono crosstalk About -40dB
Transmission frequency characteristic 5 Hz to 100 kHz + 0 -1dB
Transmission Frequency Characteristics (at Tone Defeat) Phono → SP out : 20 Hz to 20 kHz ± 0.3 dB
Aux → SP out : 5 Hz ~ 100 kHz + 0 -3dB
Signal-to-noise ratio (IHF, A-network, input short circuit) Phono : 76 dB or more
Tuner, Aux, Tape1, 2 : 100 dB or more
Crosstalk (Phono → SP out) -75dB or less (20 Hz to 1 kHz)
-60dB or less (20 kHz)
Power outlet Switched : 2 systems, total 250W
Unswitched-1 line, 100W
Pwer 100 VAC, 50Hz/60Hz
Power consumption (Electrical Appliance and Material Control Law) 165W
External dimensions Width 430x Height 147x Depth 310 mm
Weight Approx. 13 kg
Attachment Record for reconciliation