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Pioneer SX-1050

AM/FM Stereo Receiver (1976-78)

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Pioneer SX-1050


High sensitivity, outstanding circuit design in a new AM/FM receiver.

The Pioneer SX-1050 puts every significant AM/FM receiver feature together in a strikingly handsome package.

From a highly sensitive FM front end, a high selectivity IF section, to the low distortion, big power amplifier section that delivers the outstanding continuous power output of 120 watts per channel min RMS at 8 ohms from 20 to 20,000Hz, with no more than 0.1 % total harmonic distortion, the SX-1050 radiates the excellence that the stereo buff has come to expect from Pioneer electronics.

Such features as a phase locked loop IC in the MPX section, the audible multipath switch that helps eliminate FM wave interference, and the highly advanced equalizer section are not just extra touches in this receiver, but exemplify the considerable thought that has been applied to the overall design and circuit of the SX-1050.

Other important contributions to flawless sound include the Pioneer Twin Tone Control, the Toroidal-core transformer, the two very large capacitors in the power supply section - all calculated to reproduce the sound spectrum with stability arid full component protection in the inimitable Pioneer style.


Tuning range: FM, MW

Power output: 120 watts per channel into 8Ω (stereo)

Frequency response: 10Hz to 50kHz

Total harmonic distortion: 0.1%

Damping factor: 25

Input sensitivity: 6.5mV (mic), 2.5mV (MM), 150mV (DIN), 150mV (line)

Signal to noise ratio: 75dB (MM), 90dB (line)

Output: 150mV (line), 30mV (DIN), 1V (Pre out)

Semiconductors: 4 x FET, 5 x IC, 79 x transistors, 49 x diodes

Dimensions: 526.6 x 173 x 453.5mm

Weight: 23.4kg

Year: 1976


service manual   English -

instruction/owners manual   English -

brochure   English -

Related Catalogues

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Reviewed Jan 20th, 2015 by raymich1

this receivers does delivers what it takes ,when it counts.
mine is a 78 model. and still gives a good punch. bought it used 4 years ago. had it partialy rebuilt and cleaned. and i'm using it every day. so when we speak of longevity... and durability. whats more to say

Reviewed May 05th, 2013 by w7ms

Big,Heavy,Good Build Quality and Great Looks.



sherbertjim's picture

re: SX-1050 more power

If I want to push out more power to support my Cerwin Vega D-9s, what is a good match amplifier for this unit? it keeps cutting off at high volume. Thank you kindly in advance for your reply..

Jim Libert's picture

re: SX-1050 more power

If it cuts off one of the power supply regulator boards needs work. Try recapping them with high quality Nichicon transistors.

re: SX-1050 more power

My 1050 makes my klipsch kg 4.2s scream without breaking a sweat, im sure it can feed your speakers!

Jim Libert's picture

re: SX-1050 more power

I wish I had a pair of dual 15" inch Cerwins for casual listening.
They were the "bomb" http://www.cerwinvega.com/home-audio/floorstanding-speakers/xls-215.html


Hi all and thank-you for the manual. I was able to discover the protection circuit relay died! It would have been a trying effort and wasted time without the plans. Thanks again. I am going about getting my collection of equipment manuals out and check to see if they are listed for your members..a good turn deserves a return!


Thanks for having this information available for download. This is such a great help to all who are in need of manuals. Much appreciated!

sx 1050

i've loved my pioneer for years but this is the first time i've ever seen the manual. thanks so much!

bruce springsteen


Thank you so much for the SX-1050 manuals!

pioneer sx 1050 service manual

you guys are the bomb!


Pioneer CLD D500

If somebody will be able to help I'm very thankful, I'm needing of owner manual to LD Player Pioneer model CLD D500.

tdk da-5900 cd recorder manual

Thanks guys for the download somehow I misplace my manual again thank you so much


Have had a Pioneer SX-1050 for many years, stopped using it when it started blowing the power amp outputs over and over. Now I can finally trouble shoot it properly! I will visit all of your advertiser sites!

PIONNEER SX 1050 Service Manual

This is great!! ,I bought a pioneer sx 1050 and needed the service manual . Thank you very much for this provision.


This site ROCKS !!!!!!!

SX-1050 OM

Many Thanks for the upload of the Pioneer SX-1050 owners manual. I just purchased the unit,totally rebuilt, and needed the sm and om.
Thank You

tks for sx1050

Tks for the pdf on the Pioneer SX1050,,, I will come in handy with my project,,,

many tks


Jim Libert's picture

re: tks for sx1050

what was your project? Was something wrong with yours?
I have one that when turned on smoked the large power resistor and then after about 20 seconds fired a loud gunshot at me. No smoke. Lights are on but no output.

micwood55's picture

re: tks for sx1050

Hi guys, Doing a recap on mine some small issues but worked fine... Just wanted too play it safe... I replaced the Output Transistors first and Bam blew 10 amp fuse now waiting for new Insulators and silicone paste weird tested everything after that happened and found 1 new trans with issue, harnesses check out OK before and after. I am new to this but have worked on cars all my life figured can't be that hard right wrong lol. I did start off doing a sx-780 first to get some practice soldering came out great... I ordered A Transistor, Diode tester going to rebuild Amp Board and Power supplies A & B heard AWR-103 causes problems and there is a list on AK for all parts just remember to add same parts# or you'll end up with only 1 of each with the bom. Shipping from mouser gets expensive. Mine also lights up with outputs connectors removed but don't recommend testing it that way with everything connected my Surge protector starts to heat up Immediately? I shut it right down! Any help here would be appreciated... Sincerely Stuck
Mike W

re: tks for sx1050

Did you ever change for those old electrolytic capacitors for fresh ones ? It´s not wise to use any electronics with a 30 or 40 years old electrolytic caps inside. It can burn transistors and diodes and much more.

Jim Libert's picture

re: tks for sx1050

No I need to restore the power supply and that large resistor with the temp controlled device attached to it.

Appreciate the manual being

Appreciate the manual being made available.

Thanks, it looks for a long

Thanks, it looks for a long time and finally I found it, thank you very much.

This website is not affiliated with or sponsored by Pioneer. To purchase SX-1050 spares or accessories, please contact the company via their website or visit an authorised retailer.