Audio Database

SU-3602
Commentary

A pre-main amplifier with further improved performance and functionality based on the SU-3600.

All stages of the power amplifier section are directly connected OCL circuits, and a differential amplifier circuit using a constant current circuit is adopted at the first stage to improve DC stability.
In addition, the complimentary service stage is composed of all stages combined with PNP NPN transistors to suppress harmonic distortion and IM distortion and improve high-frequency characteristics.

Low noise and dynamic range are improved by an equalizer circuit composed of three stages of PNP-NPN-PNP directly connected with a low-noise PNP transistor at the first stage.

The volume is a preset type, so it is easy to return to the original position even when the volume is reduced too much.
Unlike conventional audio muting, the volume can be changed smoothly.

Equipped with two pairs of tape monitor circuits, two devices can record simultaneously and dubbing from one side to the other.

The tone control uses the Technics tone control.
At the midpoint of the knob, a completely flat characteristic can be obtained, and the characteristic change point can be changed to three levels of low and high sound.

It is equipped with a speaker connection terminal that uses 2 sets of easy connectors, main and remote.

Equipped with low / high filter and loudness switch.

Model Rating
Type Solid state pre-main amplifier
Circuit system Complete complimentary service, all stages directly connected OCL
Power Amplifier Unit
Music Power (IHF) 180W (4 Ω)
120W (8 Ω)
Effective power (IHF) 60W/60W (4 Ω)
50W/50W (8 Ω)
Power band wiz 7 Hz to 50 kHz, -3dB
Frequency characteristic 5 Hz to 100 kHz, + 0 -3dB
Distortion factor (at effective output) Not more than 0.2%
Intermodulation distortion rate (60 Hz : 7 kHz = 4 : 1 0.2% or Less (Effective Output)
Signal-to-noise ratio (IHF) 110 dB or more
Damping factor 100 (at 8 Ω Load)
Input Sensitivity / Impedance 1V/80k Ω
Load impedance 4 Ω ~ 16 Ω
Preamplifier Section
Input Sensitivity / Impedance Phono1 : 1.5mV/50k Ω
Phono2 : 1.5mV/30, 50, 100, 200k Ω
Tuner : 100mV/50k Ω
AUX1, 2 : 100mV/50k Ω
Tape Monitor 1, 2 Rec Out : 100mV/10k Ω
Playback : 100mV/50k Ω
Rec/Play (DIN) : 100mV/50k Ω, 50mV/80k Ω
Output Voltage / Impedance Rated output : 1V/5k Ω
Maximum output voltage : 3V/5k Ω
Phono maximum allowable input 130mV(1kHz)
Frequency characteristic Phono1 and 2 : within ± 0.5 dB deviation from RIAA standard curve
Tuner : 5 hz to 90 khz, + 0 to 3 db
AUX1, 2 : 5 Hz to 90 kHz, + 0 -3dB
Tone control Bass : 50 Hz, + 15 dB to -15dB
Turnover frequencies : 125 Hz, 250 Hz, 500 Hz
Treble : 20 kHz, + 17 to -18dB
Turnover Frequencies : 2 kHz, 4 kHz, 8 kHz
Loudness control 100Hz:+10dB(Volume -30dB)
Filter Low Filter : 30 Hz, -12dB/oct.
Turnover frequencies : 500 Hz
High Filter : 8 kHz, -12dB/oct.
Turnover frequencies : 2 kHz
<General>
Semiconductor used Transistor : 35
Diode : 9
Pwer 100 VAC, 50/60Hz
AC outlet Switched : 2 lines
Unswitched : 1 line
Power consumption Rated output : 110W
External dimensions Width 420x Height 150x Depth 373 mm
Weight 12.4kg