AM/FM Stereo Receiver (1974-76)
Not all high fidelity situations require high powered equipment.
If your listening room is of average size, and what you really want is more efficiency and more sophisticated versatility in a medium-powered model, Pioneer's new SX-636 will be a good choice.
It incorporates the latest state-of-the-art advantages for superior high fidelity performance. But it saves you money and doesn't waste watts.
The FM tuner employs a low-noise FET and a frequency-linear 3-gang variable capacitor in the front end. The FM IF section features a 5-stage limiter of high-performance IC and phase-linear ceramic filters. And to ensure stability under all operating conditions, the FM MPX circuit is the advanced PLL (Phase-Lock-Loop) type with an IC.
FM results are impressive: 1.9pV (IHF) sensitivity, capture ratio of 1.0dB (IHF), 60dB selectivity (IHF), signal-to-noise ratio of 70dB and wide separation of more than 30dB over the 50 to 10,000Hz range.
Accurate high fidelity reproduction is achieved with a particularly precise phono equalizer in the Pioneer SX-636. It keeps RIAA deviation within +- 0.5dB.
And as for power, the advanced direct-coupled OCL power amplifier provides continuous power output of 25 watts per channel, min RMS
at 8 ohms from 20 Hertz to 20,000 Hertz with no more than 0.5% total harmonic distortion.
This is enough to drive up to two pairs of stereo speaker systems independently or simultaneously with brilliant, high fidelity results.
As a stereo control center the SX-636 is up to the minute - there are two stereo pairs of tape terminals (deck 1 to deck 2 tape duplication is possible), a function switch to handle FM, AM PHONO, MIC and AUX. An FM-linear dial scale with dual meter tuning system, illuminated program indicators, a stereo headphone jack and other conveniences add to the versatility.
The efficient Pioneer SX-636 puts stereo power in its place - with no wasted watts or wasted money for your stereo pleasure.
Tuning range: FM, MW
Power output: 25 watts per channel into 8Ω (stereo)
Frequency response: 20Hz to 30kHz
Total harmonic distortion: 0.5%
Damping factor: 35
Input sensitivity: 7mV (mic), 2.5mV (MM), 150mV (DIN), 150mV (line)
Signal to noise ratio: 65dB (mic), 70dB (MM), 90dB (line)
Output: 150mV (line), 30mV (DIN)
Speaker load impedance: 4Ω (minimum)
Semiconductors: 1 x FET, 3 x IC, 33 x transistors, 17 x diodes
Dimensions: 480 x 147 x 405mm
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Reviewed Mar 21st, 2016 by Minwah
I have one of these and really like it. It is well build and solid, as you would expect. The controls have a nice weighty feel.
I use almost exclusively for vinyl playback (a little bit of CD / digital) using the built in phono stage, which sounds very good to my ears.
Half a point deducted as I can't find a period hifi cabinet wide enough!