Stereo AM/FM Receiver (1976-78)
Trust Pioneer to make your shopping for a stereo receiver as easy as one-two-three.
One: First, determine the amount of power output you need.
Your Pioneer dealer can help with this. If your listening room is of average size, chances are that the Pioneer SX-650 will be just right. It delivers a continuous power output of 35 watts per channel, min RMS at 8 ohms, from 20 to 20,000 Hertz, with no more than 0.3% total harmonic distortion.
Two: Be honest with yourself about the kind of preamplifier control versatility you really need.
The Pioneer SX-650 has click-stop tone controls with center-defeat positions, a high filter, tape-to-tape dubbing and more. But it saves you money by leaving the frills to more expensive units, concentrating Instead on real preamp performance - such as including a super-quiet phono equalizer with +- 0.3dB RIAA precision and a big 200mV overload for wide dynamic range.
Three: Evaluate your AM/FM needs.
Note that the Pioneer SX-650 has high FM sensitivity and selectivity, PLL multiplex for superb stereo separation, and a special IC for AM to more than satisfy your requirements. Trust Pioneer to deliver what you need and then some - one-two-three in the SX-650.
Tuning range: FM, MW
Power output: 35 watts per channel into 8Ω (stereo)
Frequency response: 10Hz to 50kHz
Total harmonic distortion: 0.3%
Damping factor: 30
Input sensitivity: 7mV (mic), 2.5mV (MM), 150mV (DIN), 150mV (line)
Signal to noise ratio: 70dB (MM), 90dB (line)
Output: 150mV (line), 30mV (DIN)
Speaker load impedance: 4Ω (minimum)
Semiconductors: 1 x FET, 9 x IC, 21 x transistors, 29 x diodes
Dimensions: 480 x 149 x 371mm
If you have any problems opening files please read the download FAQ. All files are provided under strict licence and reproduction without prior permission or for financial gain is strictly prohibited.
If you have additional documentation please consider donating a copy to our free archive.
Reviewed Aug 23rd, 2015 by gencoiable
I'm an electronic technician and It was my first vintage receiver repair attempt also first vintage receiver.
I've bought mine as broken. Power ic's and protection relay was missing. After finding missing parts around the world and a full recap and cleaning, I've a brilliant sounding hi-fi receiver except FM. At first FM didn't work. Some fine adjustment later, FM started work as good as a new unit.
I like this wooden case receivers of 70's. They are very well made and vintage look is so beatiful. There is no visible plastic parts on unit.You can just see metal and wood.
If you can replace or recondition some parts on pcb's (like electolytic caps), veneer on wooden case and some rust on metals, this unit nearly sound forever .)
Reviewed Jul 12th, 2015 by anderscastle
If you see one. Buy it!
Had the bigger ones 1250, 1080 1010 and they Sound good, but this sounds just a little bit better. The bigger ones in order for them to Sound good you have to have the volume up a bit and with massive amount of power it get some what tiresome after a while. The 650 rated at 35 rms is not that 'powerfull' but dont get me wrong it carries plenty of punch but the sound is so balanced and you can still make it sound good and still have a conversation without yelling.
But the showstopper in this which i find far superiour than the other receivers is the fm tuner, which is really really good.
So if you find one buy it!
Reviewed Jun 16th, 2015 by tutor turtle
My girlfriend (now wife) bought this Pioneer SX-650 new in 1977. Positioned in the lower-middle of Pioneers late 70's lineup, it was a very good value for the money. Clear, clean with plenty of power, it seems underrated at 35 watts, sounding closer to 50. Smart cut aluminum faceplate and machined knobs makes an impressive statement. Only available in vinyl clad MDF, it can easily be veneered in real wood, which I did in walnut after recapping it this year (2015). Now it looks as good as it sounds. I have bought restored and sold a number of this model averaging ~$250 for my efforts. The price new in 1977 was $160, or $625 in todays $s. Finding one restored for $250 is a bargain in todays world.
Reviewed Jan 04th, 2015 by rsp781s
I recently acquired my SX-650 from a third party. After all these years, it still is in amazing condition and the sound of a true HiFi Receiver is just completely different from modern digital equipment. I would highly recommend this unit. Very well built and the warmth of sound is excellent.
Reviewed Sep 13th, 2014 by leemitchener
very clear treble response exellant sound quality well made jap monster.
go buy one.