Pioneer SX-525

Pioneer SX-525

In 1972 Pioneer introduced the SX-525 and continued production up until around 1974. The SX-525 is a low to medium powered receiver designed for those on a budget. Pioneer’s advertising language at the time stated:

Stereo on a budget can have a lot of the power and a lot of the frills of very expensive stereo, as this superlative new AM/FM receiver from Pioneer so amply proves.

Pioneer SX-525 Left

The Pioneer SX-525 retailed for about $240.00 and featured the silver face plate and black dial face styling early 70’s Pioneer receivers. The blue backlit dial and signal meter, as well as the red dial indicator, make this a very appealing receiver in the dark.

Pioneer SX-525 Right

It is a relatively modest power producer putting out 17 watts per channel. Still, this is plenty for most users. It features a sensitive FM tuning section along with an FM muting switch. Inside is all solid state and the circuitry incorporates FET transistors.

Pioneer SX-525 Inside

There are hookups for a turntable, 2 tape decks and two sets of speakers. There is also an AUX connection. Note also that the SX-525 utilizes the somewhat hard to find speaker plugs. These can be found occasionally on eBay for $20-$40.

Pioneer speaker plugs
Pioneer SX-525 Back

Overall the Pioneer SX-525 is a great little receiver if you just want to fill a small to medium sized room or garage with music. It has the basic features you’ll need and sufficient power output to run most speakers. While not highly sought after by collectors they are desired by users wanting to try a vintage audio sound without breaking their budget. Prices for the Pioneer SX-525 run from around $50 to $175 for a really nice fully functioning unit.

Available on Ebay

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2 thoughts on “Pioneer SX-525

  1. Hello , I’m getting into the vintage receiver road , I may purchase a pioneer SX 525 but the 17 watts is not enough for me . Would I be able to connect an external to it ?
    Thanks

  2. The 525, like most receivers, lacks preamp outputs,
    so connecting an external power amplifier is almost impossible.
    An audio repair shop could add a stereo cable with RCA jacks for that purpose,
    but there isn’t a good opening in this model for the installation of such a cable.
    >> You must NEVER drill holes in a vintage component for Any reason,
    and don’t remove or modify the DIN connection, which is specifically intended for use with tape decks.

    I own a 525 and I did replace the speaker jacks with pushbutton terminals,
    but that did not require any drilling or other modifications.
    The procedure I performed is entirely reversible and would leave no evidence of having been done.

    If you want more power, the best thing to do is get a receiver that can deliver it to start with.

    All that said, there is something that would work, though it isn’t recommended:
    Get two 10,000 ohm (10k) resistors and two 100 ohm resistors.
    They can be small (1/4 watt or 1/2 watt) since they won’t be called upon to dissipate any real power.
    Connect one end of one 10k resistor to the + speaker terminal of one channel.
    Connect the other end of that resistor to one end of a 100 ohm resistor.
    Connect the remaining end of the 100 ohm resistor to the speaker – terminal.
    Connect the junction of the resistors to the center conductor of a patch cable.
    Connect the screen (shield) of the cable to the speaker – terminal.
    Repeat all of that for the other channel.
    Connect the other ends of the cables to the inputs of a power amplifier.
    Remember — this is Not an ideal way to derive a usable signal, just one that will do the job.

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