Audio Database

SU-C03
Commentary

Compact size integrated DC amplifier.

The main amplifier section employs six dedicated ICs for each of the voltage amplifier stage and power amplifier stage, and has a DC amplifier configuration that eliminates capacitors with time constants from the signal path.

The power supply circuit uses a small cut-core transformer with less leakage flux to ensure a low-noise design.
In addition, two 8,200 μ F electrolytic capacitors are used.

Approximately 1/3 of the total internal volume is secured as heat radiation space, and a high-efficiency large heat sink is adopted.

Uses precision die-cast panels.

Equipped with a tone control that is dimmed at the midpoint.

Model Rating
Type Stereo pre-main amplifier
Effective output (both channel drive) 40W + 40W (8 Ω, 20 Hz to 20 kHz)
Total harmonic distortion factor 0.03% (20 Hz to 20 kHz at Rated Output)
Output Bandwidth (THD 0.03%) 5 Hz to 30 kHz
Frequency characteristic Phono : RIAA ± 0.5 dB
Tape, Tuner, Aux : 2 Hz to 100 kHz + 0 -3dB
Signal-to-noise ratio (IHF-A) Phono:86dB
Tape, Tuner, Aux : 97 dB
Residual noise 250 μ V
Damping factor 40 (8 Ω)
Input Sensitivity / Impedance Phono : 2.5mV/47k Ω
Tape, Tuner, Aux : 150mV/39k Ω
Load impedance Main or remote : 4 Ω ~ 16 Ω
Main and remote : 8 Ω ~ 16 Ω
Phono maximum allowable input 150 mv (1 kHz, RMS)
Tone control Bass : ± 10 dB (50 Hz)
Treble : ± 10 dB (20 kHz)
Subsonic filter 30 Hz, -6dB/oct.
High filter 7 kHz, -6dB/oct.
Loudness control + 9 dB (50 Hz, VR-30dB)
Pwer 100 VAC, 50Hz/60Hz
Power consumption 105W
External dimensions Width 297x Height 98x Depth 270 mm
Weight 5.9kg