Pioneer SX-780

Pioneer SX-780

This is the Pioneer SX-780. It was the last of Pioneer’s 700 series receivers and was very well built. It was produced from 1978 up until 1980 and had a list price of $325.00.

The SX-780 was rated at 45 watts per channel but that was probably under rated. The internals were high quality with Darlington STK-0050 Power Packs in the output stage as well as high quality Nichicon capacitors.

 

Pioneer SX-780 Front

 

While it had crisp FM reception some feel that its FM selectivity is a little weak. It also has a great phono pre-amp section but could have used some more AUX inputs. Overall a great starter receiver for someone just getting into the vintage audio scene.


Pioneer SX-780 Back

 

It features:

 

  • AM/FM stereo receiver
  • A + B speaker outputs
  • 4 RCA inputs: Aux, Tape1, Tape2, Phono
  • 2 RCA outputs: Tape1, Tape 2
  • Chassis grounding post
  • Bass + Treble tone controls
  • Loudness switch
  • 15hz low frequency filter
  • Headphone output

 

The Pioneer SX-780’s sell for around $500-700 in very good working condition.

Listings from eBay

Vintage Pioneer SX-780 Stereo Receiver - Fully Serviced

$699.99
End Date: Wednesday Apr-8-2020 12:59:15 PDT
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PIONEER SX-780 VINTAGE STEREO RECEIVER - SERVICED - CLEANED - TESTED

$584.95
End Date: Wednesday Apr-22-2020 15:15:09 PDT
Buy It Now for only: $584.95
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Pioneer SX-780 Receiver. Excellent condition, working well!

$480.00
End Date: Thursday Apr-23-2020 18:10:08 PDT
Buy It Now for only: $480.00
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Pioneer Vintage Stereo Receiver Model SX-780 EXCELLENT one owner SX780 SX 780

$490.00
End Date: Tuesday Apr-28-2020 20:38:23 PDT
Buy It Now for only: $490.00
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9 thoughts on “Pioneer SX-780

  1. I have one of these that powers on but doesn’t deliver sound through the speaker outputs or the headphones. Is there a common cause for this that you are aware of?

  2. CAN I USE THE STEREO/MONO SWITCH FOR LISTENING TO STEREO/MONAURAL, AND FULL FREQUENCY RANGE RECORDING REGARDING VINYL RECORDINGS? IF I’M NOT LISTENING TO A STEREO RECORD, SHOULD I SWITCH TO MONO? THANK YOU FOR YOR HELP.

  3. Yes, I would engage the Mono switch. Mono will mix the right and left channels and should lessen the noise from a monophonic record. For a couple good reads regarding mono try these links…
    Mono vs Stereo guide
    and
    For Those New To Mono
    Both cover the basic ideas behind playing mono recordings.
    Good luck!

  4. I’ve read elsewhere that some feel the 750 was higher quality, as evidenced by a superior heat-sinking design as well as other items. Do you know if this is a general assumption: did quality dip with the 780, 880 and 980 series?

  5. So with that phono pre amp.They will hook right up with today’s turntables say a..U turn or a Pro ject. And work correct ?

  6. Rob: Yes, though some turntables today have built-in pre-amps and do not need a receiver like this to produce music. But, with this receiver you will see (hear) much increased sound quality and volume. The amps in these vintage receivers are far, far superior to the cheap built-in amps in many of today’s turntables.

  7. A couple days ago, rescued one of these out of a recycling bin. Spent a couple evenings cleaning the nicotine and dust off the exterior. Straightened the knobs and switches. Was In great cosmetic shape. Guess the nicotine acted as a preservative. Washed and dried the boards with alcohol. Flushed the pots and switches with DeOxit. I hooked it up to a dim bulb tester to bring up the power slowly. No issues. After warmup, adjusted the bias, didn’t need much. Ordered some 8V LEDs because the lamps were burned out. Sonically, seems to be great hooked up to my AR-2AX speakers which are streaming HiRez audio from Tidal.

  8. Just scored one of these for free from my job. I work at an electronics recycling facility and saw it on a shelf and bee-lined over to it. The outer shell is a little beat up, and after getting it home I found the headphone jack doesn’t work. It could be an easy fix, but I’m not too worried about it. I hooked up my LP-120 to it, and some Pioneer floor speakers and it has some serious power behind it. Does anyone have any suggestions for a good tape deck to add?

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