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Pioneer SX-1250

AM/FM Stereo Receiver (1976-78)

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Pioneer SX-1250


When you go to buy a new receiver, ask yourself these questions:

Does its FM tuner section guarantee high performance of spurious rejection as well as high sensitivity?

Does it include the very latest electronics circuit technology to assure a constant stable and high quality sound reproduction from small to large power output?

Are you going to be proud to own it for a long, long time?

Pioneer's new and elegantly designed SX-1250 AM/FM receiver provides a resounding yes to each of these questions - and then some.

No other Pioneer receiver provides such incomparable FM performance and sensitivity and then combines it with mammoth continuous power output of 160W per channel, min RMS at 8 Ohms, from 20 Hertz to 20,000 Hertz, with no more than 0.1% total harmonic distortion.


Tuning range: FM, MW

Power output: 160 watts per channel into 8Ω (stereo)

Frequency response: 10Hz to 50kHz

Total harmonic distortion: 0.1%

Damping factor: 30

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)

Speaker load impedance: 4Ω (minimum)

Dimensions: 556 x 186.5 x 464.5mm

Weight: 29.2kg

Year: 1976


Related Catalogues

Hi-Fi Stereo

Stereo Components

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Reviewed Feb 14th, 2020 by

I have owned mine 43 years it’s been the best since day one never a problem, but I just had it “restored” all capacitors, several transistors, it’s even better now I didn’t think that was even possible. It tested now at 198 WPC. It’s more quiet and it feels cooler than it used to.

Reviewed Oct 20th, 2019 by

Together with a par of Rogers LS3/5A and god Vinyl player, it defines the word HiFi. Big powerfull, nice and detailed sound.
Just love it!

Reviewed May 08th, 2019 by

This thing is a beast in terms of its size and a beast in terms of its power output . This unit is well built and will serve you like a slave, however this receiver will need a thorough servicing around now especially the fact that its about 45 years old now . Very nice machine .

Reviewed Apr 15th, 2019 by

I own several vintage receivers, (Pioneer, Kenwood & Sansui,) , The SX 1250 is my favorite, and I think it sounds the best overall. If you can find one for sale, buy it.

Reviewed Jul 29th, 2018 by

Just pulled the old receiver out of storage. After reading the on line reviews, decided to take the plunge and repair it. $85 for parts and some additional labor for a major over-haul and was rewarded with a great receiver! Added an antenna for FM and a blue tooth connector to take AUX input and am streaming the web! Can't wait for the turn table to come in!

Reviewed Jun 06th, 2018 by

Proud owner of this amazing piece of audio history with all manuals chematics and bill of original sale. 60 plus pounds of pure pain with the power to crush and contain! Vinyl never sounded better after adding this massive beautiful receiver. Power weight and warmth with exceptional detail packaged in a beautiful chassis that exudes fine design. At night this receiver adds to and never distracts from the living environment. As you can see I love it and will never part with it.

Reviewed Dec 19th, 2017 by

I am the proud owner of a SX-1250, I always thought they were the epitomy of 70's technology, for the most part all the heavy hitters of that era were in the wattage wars till after 77-78. After then they started to scrimp on the quality of the units, even though they might have produced more wattage, build quality suffered some. The 1250 was probably the best quality, easiest to repair, receiver ever made. I just did a 100% redo on mine less resistors, and a few diodes. I suspect this unit will last another 40 years, long after I'm gone! Beautiful, Powerful, Reliable, and a sound that only the high end receivers can deliver. If you have the opportunity to get one, pull the trigger, have it redone and revel in the warm tubelike sound for the rest of your life. Enjoy the music!!

Reviewed Nov 09th, 2016 by

What power turns normal speakers to mush....use the high end vintage speakers and it is pure distortion free sound.
I have the Marantz 2285, Sansui G8700db and Kenwood KR9700 all same wattage and this is by far the one I use daily. It looks better both lite up and at idle and ease of use is better too. Love switching between FM, Tap and phono with just a push of a button.

Reviewed May 08th, 2016 by

This receiver is a real Monster power. Advice to present and would be audiophile; (a) ensure you have plenty of wattage of your speakers and maybe new surrounds just to enjoy this piece of Electronic master piece. With massive heat sinks and all 650w of electronic ingenuity, it is an icon of the past wars of competition who's the best. (b) Enjoy this as analog is so much way ahead of the present compacted recordings etc.

Reviewed Feb 26th, 2016 by

The 1250 took me back to the best times of my life, lets me hear things I hadn't been hearing through my speakers for a long time. It has that warm sound that I love and remember. When I found my first one, I had it recapped and it should be good to go for a very long time.

Reviewed Jan 30th, 2016 by

A genuine audio masterpiece of Pioneer. It surely reminds us, the U60, of the wonderful sounds of the past.

Reviewed Mar 01st, 2015 by

My dream came true! I was already a proud owner of the Pioneer SX-850, now a SX-1250 just fell into my hands. It's near mint except the wood which has it's normal wear. It has already been recapped just needed another cleaning which I have spent all weekend cleaning every piece of it with great care. I have the speakers to support this and I have a QA-800 Quad amp coming next week. I listened to it before I bought it. It's the bomb! If you have a chance to buy on of these I highly recommend it as they are soooo choice! ;-) Happy Dayz. SLim Jim

Reviewed Feb 27th, 2014 by

best for ever receiver....



re: SX-1250

The BEST darn receiver (SX 1250) in the world !
These last forever, have enjoyed mine for 30 years !
Thanks for all the info here on the SX 1250. Arron


I just bought a non working one, from a hi-fi store with all risks. When I saw it on the window, I asked it and bought it! It is very very rare in here, Turkey.

Now the problem is it doesn't have both power amp boards, (AWH-048) Does anybody know where can I find them? I look for bidding sites for donor parts, but there are no parts or already sold out. I want to bring back to life this monster...

re: SX-1250 notes on Schematic - no 13.5V or 5.4V

I am working on a 1250 with a power supply issue. No +13.5V or +5.4V.
I downloaded the schematic here and see pencil notes suggesting the same issue.

Also my +25V is at -10V. The schematic noted that the +25 was +6V when failing.

Sure looks like I have the same issue as the original schematic owner.

Long shot but wondering if could find the person who kindly shared the schematic and could they share their eventual findings on the issue.

Cheers -

re: SX-1250 notes on Schematic - no 13.5V or 5.4V

rebuild the PS, go to audiokarma web site and Pioneer section. many people to help you out and get Mouser bom lists

re: SX-1250 notes on Schematic - no 13.5V or 5.4V

I did not put the pencil makes in, but have worked on many Pioneer power supplies. I would concentrate on the +25v section as this seems to provide a reference for the 13.5V and 5.4v supplies as well.
Check the 2sc1384 for open base to emitter (or greater than 1vdc across junction when unit on)
Check the 2SD313 for open base to emitter (or greater than 1vdc across junction when unit on)
Check also the Zener diode and small signal diode in the circuit as well, for short or open condition
Last but not least check the resistors for the rated value, and make sure that none of the electrolytics are shorted.
After the +25v section is fixed, the 13.5 and 5.4 should be ok. If not check the 2SC325 transistor for open.


And relating to the below comment, I am active with repair direction specifics on AudioKarma as well as HiFiengine. I also have done repairs for many years.

re: SX-1250 notes on Schematic - no 13.5V or 5.4V

Ask your question on Audiokarma.org. There are people there who repair these units.

re: SX-1250

Hello. I have an SX-1250, does anyone have any idea where I can get a full service on the unit, I live in Los Angeles, CA. Thank you


Purchased brand new in Columbus, Ohio in 1977 and it still kicks ass! Not bad for a system that is over 35 years old. Serviced only 3 times and replaced CAPS, and some 'dusty' tuner components.

Love this receiver, possibly the best BBA receiver Pioneer marketed to the US. I also matched this receiver with 2 Pioneer HPM-500 floor speakers (well, by today's standards you could call them small condominiums). Giant 15" monster woofers.

Love the 70' big bottom audio!

My 1250 is about to go through some changes

Thanks to finally having the service manual. I've owned this receiver for about 8 years, and now that I'm back working as an electronics tech, have every conceivable piece of test equipment available to me, and a manager who encourages me to work on personal gear, this baby is going to be special!

New PS caps, poly caps in all the audio paths, replacing the speaker terminals, and some tuner mods as well.



thanks , thanks , supper , Glad to have one,
nice to have had your help by the manuals and schema...thanks a lot..


Thanks..been a proud owner of this fabulous product I had been looking hi & Lo for a manual..now I have it..This receiver ROCKS!


I am about to modify mine. I will post here and let you know how it works out.



Pioneer SX 1250

Fantastic!! Thanks.

sx 5529

Just pulled the trigger and purchaced a sx 5529 Thanks for all the info. Great stuff.
Thank you

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