Audio Database

The

Pioneer SA-100
80,000yen(around the 1971 time)

Description
 
The high-class stereo Integrated Amplifier which adopted the whole page hardwired-connection OCL circuitry.

The whole page hardwired-connection circuitry of the positive/negative 2 power-source scheme which uses a silicon transistor is used for a power amplifier part.
The wide band play is enabled by eliminating a coupling capacitor and an output capacitor.

In the preamplifier part, the three-step hardwired-connection circuitry by a low-noise silicon transistor and the three-step hardwired-connection NF type circuitry which uses first rank low-noise FET for a tone control part are adopted as head amplifier.

What combined the electronic circuitry and the power relay is adopted as a protection network.
Since it serves also as the power-source muting at the same time this protects a speaker and a power transistor from a destructive, the noise at the time of a power-switch injection is also stopped.
Moreover, this protection network serves as an auto-return type which returns to a normal status, if a trouble is solved.

Two Phono inputs are carried. Moreover, by Phono2 position, a using of MC cartridge is also possible by an option transformer besides man-month type.

The row / high filter, and the muting switch which are changed to a two-step in a cut-off frequency are carried.
Moreover, it can be used with the switchpoint of a rear panel, being able to divide a preamplifier part and a power amplifier part.

The technical data in which the actually measured property was recorded is attached to SA-100.

Rear
Internal

Rating of a mode
Form Stereo Integrated Amplifier
<Power amplifier part>
Circuit system Whole page hardwired-connection semi- complimentary scheme
Music power (IHF) 240W (4ohm)
170W (8ohm)
Effective output
1kHz, One-side-channel drive : 94W/94W (4ohm)
67W/67W (8ohm)
Both ch(es) drive : 82W+82W (4ohm)
57W+57W (8ohm)
20Hz - 20kHz, both channel drive : 47W+47W (8 ohm, 0.3% or less of distortion)
THD 0.3% or less (at the time of an effective output)
0.03% or less (at the time of 34W/34W output)
Cross modulation distortion 0.2% or less (at the time of an effective output)
0.05% or less (at the time of 34W/34W output)
Output bandwidth (IHF) 5Hz - 50kHz
Frequency characteristic 5Hz-80kHz±1dB
Input sensitivity/impedance 500mV / 100kohm (at the time of an effective output 1kHz)
Load impedance 4ohm-16ohm
Dumping factor 65 (8 ohm, 1kHz) or more
Center channel Output voltage 500mV
<Preamplifier part>
Output voltage At the time of an effective output: 3V
At the time of the maximum output: 5V
THD 0.1% or less
Frequency characteristic 20Hz-60kHz±1dB
Input sensitivity/impedance
(At the time of an effective output 1kHz)
Phono1: 2.9mV / 50kohm
58mV / 100kohm (CER)
Phono2: 2.9mV/20, 50, 100kohm
115 microvolts/30 ohm (MC transformer combined use)
MIC: 2.2mV / 50kohm
Tuner, AUX1, 2, Tape Mon1, 2 : 200mV / 200kohm
Sound-recording output Tape Rec(pin jack)1, 2:200mV
Tape Rec (DIN recording-play connector): 30mV
Tone control
(3dB step)
Bass: 9dB - 100Hz-+12dB
Treble: 12dB - 10kHz-+9dB
Filter Low filter: -3dB (30Hz, 60Hz), 12dB / oct
High filter: -3dB (6kHz), -4dB (12kHz), 12dB / oct
Equalizer (Phono) RIAA, S.T.D
Loudness (Volume-40dB) 100Hz:+11.5dB
10kHz:+6.5dB
Muting -20dB
A hum, a noise Phono: 80dB or more
AUX: 100dB or more
<Synthesis>
Power consumption Rate: 190W
Maxima: 340W
Dimensions Width 430x height 145x depth of 337mm
Weight 12.8kg