Description
PIONEER SM-101 Stereo Power Amplifier 70+70Watts RMS Vintage 1970 WORK Good Look Working Perfect Original from the Japanese market, it works on 100 volts, is completely restored and works perfectly at 100% - For shipments to Europeus countries it is supplied with a transformer to work on 220/240 volts Pioneer SM-101 ¥ 49,800 (around the early 1970 s?) This is a stereo power amplifier designed to be used by enthusiasts. In order to obtain a low distortion factor and uniform power over a wide range, a pure complimentary service OCL circuit directly connected to all stages is adopted. A pair of triple-diffused power transistors with high breakdown strength for both PNP and NPN, developed for high output power, is used. In order to stabilize the DC potential, two differential amplifiers are used. Together with the temperature compensation circuit, stability is increased. The protection circuit is a unique combination of relays and electronic circuits (8 transistors, 10 diodes). When the DC balance of the output stage is lost and the DC component flows, the differential amplifier detects this and cuts the relay circuit to prevent the DC from flowing to the speakers. Also, when the output terminal of the speaker is short-circuited or excessive current flows in the output stage, the AC component of the output stage is detected and the relay circuit is turned off to protect the power transistor. When the power switch is turned on, it acts as a mute to prevent unpleasant noise from the speakers. The indicator on the front panel blinks when the protector is operating. An output level meter is mounted on the front panel. The sensitivity of the meter can be switched to five positions : Off, 0 dB, -10dB, -20dB and -30dB. Two input systems are installed, and can be switched with the front switch. In addition, it is equipped with an input sensitivity selector of constant input impedance, and 4 positions can be switched as needed. Equipped with left and right independent speaker phase change switches. There are two types of speaker output jacks, which can be switched between A, B, or A + B using the selector. The characteristic data of each unit is attached Model Rating TypeStereo power amplifier Circuit systemAll-stage direct-coupled complimentary service OCL circuit Music Power (IHF)240W (4 ?) 170W (8 ?) Effective powerSingle channel drive 70W/70W (8 ?) 90W/90W (4 ?) Both channel drive 60W + 60W (8 ?) 78W + 78W (4 ?) 20 Hz ~ 20000 Hz Output (Both Channels Driven) 50W + 50W (8 ?, Distortion Factor 0.15% or Less) Harmonic distortion factor0.1% or Less (Effective Output) 0.05% or Less (8 ?, 35W/35W Output) Cross modulation distortion factor0.1% or Less (Effective Output) 0.06% or Less (8 ?, at 35W/35W output) Output Bandwidth (IHF)5 Hz to 30000 Hz Frequency characteristic8 Hz to 70000 Hz, + 0 -1dB Input Sensitivity / Impedance (Effective Output, 1 kHz)0.5 V, 1 V, 2 V, 5V/50k ? Load impedance4 ? ~ 16 ? Damping factor40 (8 ?, 1 kHz) Hum and noise (IHF short circuit)95 dB or more Meter sensitivity selectorOFF, 0 dB, -10dB, -20dB, -30dB Level meters (L, R)0 db = 70W/8 ? Semiconductor usedTransistor : 26 Diode : 24 Others Power supply voltage100 VAC, 50Hz/60Hz Rated power consumption125W Maximum Power Consumption330W Power outletLinkage : 1 system Non-linked : 1 system External dimensionsWidth 430x Height 144x Depth 337 mm Weight10.7kg
Live search