Pioneer SC-100
¥ 82,800 (around 1971)
Commentary
A high-end preamplifier that uses silicon transistors for everything.
Equipped with Phono which can alternately use Route 3 pickup, MC cartridge can also be used with built-in MC amplifier, and Phono2 can switch input impedance to 3 stages.
The input selector is divided into two systems, a low-level system and a high-level system, so you can pass through positions that are not used when selecting.
The equalizer amplifier is a 3-stage direct-coupled E-E feedback type using low-noise silicon transistors.
The volume is a 2 dB step real attenuator type.
It also comes with a 15 dB 3-step lever attenuator that can be used as a muting switch.
By using a constant-voltage power supply with a zener diode, it is designed to follow power changes with a margin.
For tone control, Bass and Treble are independent 2.5 dB step 11 contact rotary type is adopted.
The filter is an electronic filter that sharply cuts noise without affecting sound quality. The cutoff frequency can be switched between two levels for both Low and High.
Model Rating
Type | Stereo preamplifier |
Output voltage | 5V |
Harmonic distortion factor | Not more than 0.2% |
Frequency characteristic | 5 Hz to 50 kHz |
Input Sensitivity / Impedance | Phono 1 : 1.5mV/50k Ω Phono Low : 0.08mV/450 Ω Phono 2 : 1.5mV/20, 50, 100k Ω switching Tape Head : 1.2mV/150k Ω Tuner, AUX1, 2, Tape Mon : 80mV/150k Ω |
Recorded output | Tape Rec (pin jack) : 80 mV |
Tone control (2.5 dB step) |
Bass : 50 Hz, -10dB to + 15 dB Treble : 10 kHz, ± 12.5 dB |
Filter | Low filter : -3dB (30 Hz, 60 Hz) High filter : -3dB (6 kHz, 11 kHz) |
Muting | -15, -30dB |
Hum, noise | Phono : 70 dB or more AUX : 70 dB or more |
Power consumption | Maximum : 5W |
External dimensions | Width 420x Height 170x Depth 295 mm |
Weight | 6.5kg |