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Pioneer SA-8100

Stereo Integrated Amplifier (1973-75)

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Pioneer SA-8100

Description

The SA-8100 is Pioneer's big power integrated stereo amplifier.

It features a unique twin tone control system for versatile tonal adjustment, high and low subsonic filters and high stability, reliable pure complementary OCL power amplifier design, with differential amplifier at the first stage. Large electrolytic capacitors ensure stable operation.

Specifications

Power output: 40 watts per channel into 8Ω (stereo)

Frequency response: 10Hz to 70kHz

Total harmonic distortion: 0.05%

Damping factor: 60

Input sensitivity: 2mV (mic), 2.5mV (MM), 150mV (line)

Signal to noise ratio: 70dB (mic), 80dB (MM), 90dB (line)

Output: 150mV (line), 30mV (DIN), 2V (Pre out)

Speaker load impedance: 4Ω to 16Ω

Semiconductors: 49 x transistors, 25 x diodes

Dimensions: 430 x 138 x 341mm

Weight: 12.1kg

Accessories: connecting cord, hex wrench, polishing cloth

Year: 1974

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Reviews

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rating
Reviewed Apr 22nd, 2017 by boke

Very pleasantly surprised. 3D sound ! Seriously ! New sounds from old songs I never noticed before. That is, nuanced, soft sounds and backgrond instruments I never noticed with the SA-7500 mkI come alive with this unit. Inside individual metal shields where my latter SA-7500 mkI had none. Best unit so far ( also have the Sony TA-1120A, TA-1130, STR-6050, STR-6060, STR-7065 and the Yamaha CR-800). Even the Yamaha CA-800 I sold wasn't quite as good.

rating
Reviewed Jul 13th, 2015 by pjp

Excellent amplifier, used as a power amplifier preamp Sony TA55es.
Warm, accurate sound

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Reviewed Jun 03rd, 2014 by MIL-Q

Internally built like a tank. Good quality PCB's. Nichicon caps on PCBs. Power supply: (2) caps ELNA 10,000 uf, 50V.
Interesting dual controls of both bass and treble boost using 9 and 5 position wafer switches selecting precision RC networks. Has, IMHO, some unneeded features; level set, for example.
Sound quality is excellent and it is a handsome looking unit. 45 wpc is more than ample.

rating
Reviewed Apr 28th, 2014 by Paulmac

My SA-8100 has a slight volume difference between right and left. However, the balance control can take care of this. The Amp sounds warm but bright at the same time. Using Fluance towers which are somewhat bright by nature. So far, the amp sounds very good. Not as good as the Sansui AU 717 but to be fair, the 717 has been recapped. Like many of the mid 70s, the build quality is amazing compared to the stuff made today.

 

Comments

re: SA-8100

To the review above (MIL-Q):

If you use LOUDNESS, LEVEL SET is actually quite useful. As explained in the instruction/owners manual, rotating the VOLUME knob :

With the LEVEL SET at 0dB : Loudness circuit works from MIN to 11 O'CLOCK (vol)
at -15dB: Loudness circuit works from MIN to 1 O'CLOCK (vol)
& at -30dB: Loudness circuit works from MIN to MAX (Full Volume).

Note: If you don't use Loudness, Level set would be quite useless as there's already a MUTING SWITCH (=20dB) for answering telephone calls without fiddling with the volume control. Great system. Mine's fully recapped and re-transistorized (save the big output transistors). Super quiet between songs. Beats modern systems costing a Grand or more.

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