Question about Yamaha RX-V730 Receiver

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Yamaha RX-V730 problems

So heres the deal, I've had the amplifier for a few years now and its never really given me any problems until about three or four weeks ago. The first thing was that the system would shut off after it had been running for a while at high volumes. We tend to have parties at my house and the music and the subwoofer are always very loud. The screen would display something like "CHECK SPKR WIRES" Something along that line. So i fiddled with the wires and didnt have the problem anymore. Now however is something far more frustrating. When i turn on the system, if music is already running, everything is clear and fine for about two or three seconds and then suddenly the sound loses all bass and becomes practically treble by itself. The volume no longer responds properly. Ive tried adjusting bass and treble, ive tried the speakers with other systems, ive adjusted every possible facet of the internal settings and nothing is correcting the problem. Can anybody help me out?

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I used to have a set of speakers with 'poly switch' over-current protectors (kind of a 'soft' fuse the size of a small ceramic capacitor) installed in-line with the speaker terminals. (Each speaker in an enclosure needed its own device.) The theory was they appeared as a dead short until their rating was exceeded, going open-circuit to protect the (assumed, more expensive) speaker element. When things 'cooled down' it returned to the former short status and the speakers came alive again. Testing the device with a decent drive signal (it worked), I noticed the sound 'strangled' and only a low-volume, higher-frequency component of the source signal was heard through the speaker. (So I guess it wasn't *totally* open circuit...) After a few seconds of signal removal (and reduction of source volume) the sound came back to normal. Here's my thought: Perhaps your speakers have these devices installed and the devices are operating accordingly. Of course, if the source signal is of a known low-volume, then it sounds like an amplifier component is failing on load. Especially if the speakers behave normally using another amplier. Cheers...

Posted on Aug 30, 2007

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Posted on Jan 02, 2017

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