Question about Sony SA-WX90 Subwoofer

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Sony sa-wx90 subwoofer

When amp is turned off and sub woofer is plugged in at mains subwoofer bangs every 3 minutes

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Re: sony sa-wx90 subwoofer

Thats called electrical recoil, the energy that is stored bursts out thru your subs therefore you hear your subwoofer bang.

i suggest you clean your wirings.

hope this helps.

Posted on Jan 14, 2008

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your speakers were sitting to close to sub woofer and what happen was when puttind to batteries together what happens they move away from each other you blew your sub woofer the only thing to do now is replace subwoofer.

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My sub has stopped working. It worked fine for the 3 years i've had it; then nothing. I have never touched the CUT OFF FREQ or PHASE and theVOL has always been at 50%. I connect it to my Yamaha RX-V730...

We're talking Sony SA-WM200 Sub, right?

OK, now we go through the usual drill.

Does it work during speaker setup?

Yes? Not broken. Redefine the failure mode and start over.

No? Is it defined to the receiver?

Yes? Are you sure the RCA cable is ok? Try another.

Still unresolved?

Let's prove it's getting an input. Move the cable from the Sub Woofer Out to either channel of the Main Output (below the speaker connectors) and choose FM as the source. This would eliminate direct a Front Channel signal to the sub, bypassing the internal dependency of directing only LFE to the sub. Granted, there may not be much low bass in the program but a working sub will reproduce something in the presence of full-range signal. You may have to actually touch the driver to feel it moving.

Still nothing?

Then we're doing forensics.

Did it just stop working while you weren't looking or was there something traumatic that preceded it?

Disconnect the power to the sub. If you can access the actual terminals on the back of the speaker driver you could disconnect them and attach speaker leads from, say, your front right speaker, to see if the driver is alive. Or, if you have an ohmmeter, just measure across the terminals. You should have some kind of low single-digit reading but not a dead short. If the driver is ok that would point to an internal amp problem. Too bad. A pro needs to look at it.

I had a Klipsch sub amp die on me and the local guru couldn't do anything with it so I disconnected driver from the amp, ran some cables outside the enclosure from it and got a separate amp to push it. So it's not a total loss.

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Bad output IC or voltage rectifier are the most likely at fault.

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Power to subwoofer but no power to SA-HT692 receiver.

I had the same problem although not in storage but it just lost power to the console. It turns out that when I press down on the cable connecting the sub woofer and console, at the back of the sub woofer, I temporarily get power to the console. I did that for long enough to eject my DVD's and then opened the back of the sub woofer to fix it and cracked the board and broke it forever.

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I wouldn't try reinventing it by replacing the driver. Drivers and their enclosures are designed to work together. And this being a self-amplified subwoofer, there is one more piece that's electrically optimized to the rest. Don't mess with it.

Why don't you just set your receiver's individual relative speaker volume levels so the sub isn't weak by comparison to your other speakers? Weakness, as you call it, is relative.

Is your receiver properly channeling Low Frequencies to the sub? Experiment with the cutoff, too.

This problem doesn't require meatball surgery.

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firt you clean the subwoofer with cleaner after that, check the subwoofer srrounding, no electrical wire ,mobile phone & electrical operated items is near ur subwoofer.
1. Do not use maximum volume of subwoofer.
2. Use only 65-85% volume of your sub woofer.

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sub can be detecting signal from your amp. maybe your amp has some small output when in standby mode. some amps throughput signal from satellite boxes when they are supposed to be off.
try shutting off that signal source as well.
good luck

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