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 $250.00 in very good working condition.

 

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4 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?

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