Technics SU-3602
¥ 79,000 (around 1973)
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 |