Up for sale is a freshly restored Pioneer SX-1250. This was Pioneer’s top-of-the-line receiver from 1978. This is a 160 watt-per-channel stereo receiver that will power any speaker you can throw at it. It is a piece of history.
It is in great condition, has been FULLY restored, LED converted, and sounds amazing.
This unit is for sale for *****SOLD*****
Come in and give it a listen before you take it home!
This receiver has had the following work done:
- The main filter capacitors were replaced.
- The power supply was recapped with new diodes and regulators.
- The protection board was recapped with new relay transistors and diodes.
- The stabilizer board was recapped with new transistors, regulators, and diodes. All cold solder joints repaired.
- The power amp boards were recapped with new input pair transistors and new bias/offset potentiometers.
- The phono preamplifier was recapped with matching transistors.
- The preamp board was recapped with new transistors.
- The tone board was recapped with new transistors.
- The filter and muting assemblies were recapped with new transistors.
- The function switch capacitor was replaced.
- All controls were cleaned and relubed with deoxit.
- The indicators and dial lamps were all replaced with LEDs.
- The wood case got some Howard’s Restore-a-Finish and Feed-n-Wax.
- The unit was biased according to spec and DC offset was set to zero.
- The unit was play-tested after the restoration.
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.
See below for pictures of the restoration.
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
Main filter caps
Old vs new amp boards
Power supply board