Technics SU-3100
¥ 34,800 (around 1973)
Commentary
This is a pre-main amplifier that uses the all-stage direct connection ITL-OTL-OCL circuit used in the SU-50A and SU-3600.
A monolithic IC is used in the drive stage of the main amplifier to improve the SN ratio and characteristics.
The equalizer circuit is a combination of PNP-NPN transistors.
The first stage uses specially selected PNP transistors and has succeeded in reducing noise.
Separate left and right level meters are used on the front panel to monitor the output level of the left and right channels.
Equipped with a microphone terminal.
It has a built-in matrix circuit that takes out 4 ch output from 2 ch source. By connecting 4 speakers, you can enjoy matrix 4 ch playback.
Model Rating
Type | Solid state pre-main amplifier |
Circuit system | ITL-OTL-OCL circuit |
Power Amplifier Unit | |
Music Power (IHF) | 46W (4 Ω) 40W (8 Ω) |
Effective power (IHF) | 18W/18W (4 Ω) 16W/16W (8 Ω) |
Power band wiz | 7 Hz to 35 kHz, -3dB |
Frequency characteristic | 10 Hz to 100 kHz, + 0 -3dB |
Harmonic distortion factor | 0.08% |
Residual noise | 1 mV or less |
Signal-to-noise ratio | 90dB |
Damping factor | 40 or More (8 Ω Load) |
Input Sensitivity / Impedance | 200mV/30k Ω |
Preamplifier Section | |
Input Sensitivity / Impedance | Phono1 : 2mV/50k Ω Phono2 : 7mV/50k Ω Tuner : 150mV/60k Ω AUX1, 2 : 150mV/60k Ω MIC : 28mV/50k Ω |
Tape Monitor 1, 2 | Rec Out : 150mV/5k Ω Playback : 200mV/90k Ω Rec/Play (DIN) : 35mV/80k Ω |
Output Voltage / Impedance | Rated output : 0.2mV/2k Ω Maximum power : 3 V |
Phono allowed input | Phono1:100mV(1kHz) Phono2:300mV |
Frequency characteristic | Phono1 and 2 : deviation from RIAA standard curve within ± 1 dB Tuner : 10 hz to 100 khz, + 0 to 3 db AUX1, 2 : 10 Hz to 100 kHz, + 0 -3dB |
Tone control | Bass : 100 Hz, + 10 dB to -10dB Treble : 10 kHz, + 10 dB to -10dB |
Loudness control (Volume -30dB) |
100 Hz, + 8 dB 10 kHz, + 3.5 dB |
High filter | 6 kHz, -6dB/oct. |
<General> | |
Semiconductor used | IC:2 Transistor : 13 Diode : 11 |
Pwer | 100 VAC, 50/60Hz |
AC outlet | Switched : 1 system Unswitched : 2 lines |
Power consumption | Rated output : 55W |
External dimensions | Width 394x Height 119x Depth 283 mm |
Weight | 6.5kg |