Question about KLH R5100 Receiver

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Center channel turns scratchy.

After about an hour or so of use, the center speaker turns scratchy. All the other speakers are fine, no matter how long they are used for. I've tried multiple speakers, multiple imputs, and changed the wiring, none or which have fixed the problem.

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Re: Center channel turns scratchy.

Sorry to inform you, The driver transistors or IC is going bad, or there might be a poor solder connection on the center channel Amp. If you know how to solder, you may be able to poke around at the center channel amp circuit, with a wooden or plastic tool, and maybe see where the bad connection(s) are. To get a shop to looki at this unit, may not pay, but that is all up to you, on how much you paid for the unit, and how much your willing to pay to get it fixed. Read this great article and see if it helps you to decide. Good Luck Please do not forget to rate this thread.

Posted on Dec 17, 2006

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go to audio set up and configure the system for 5.1 or higher sound output.then only all the speakers ll work

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Replace center channel speaker with known good one. If no longer scratchy then the voice coil of removed unit is rubbing against the magnet pole and the speaker needs to be replaced. If the replacement speaker also sounds bad, then the amp for the center channel needs repair.

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Yamaha RX-V365 Receiver when I hook up my center channel it is not audible at all. The R and L speakers work fine when they were located in the FRONT A and FRONT B terminals, but when I moved everything to...

With what signal did you try? Maybe your signal source (DVD/TV or radio) didn't contain any sounds for the center channel.
Go to the Setup menu, Speaker setup / Manual setup and find there item called "Test tone". It will output a test tone to each speaker individually (you will see on LCD which speaker is being tested at each moment). If you will hear a sound from the center now, there is no issue and center is working fine, just your source didn't contain any sound for the center.

If it doesn't work, then either you have faulty cable, faulty speaker or faulty center output of the receiver.
- Try connecting the center speaker to different output of receiver (this will test if speaker is OK).
- Try connecting working LEFT speaker to left output with CENTER cable (this will test if cable is OK).
- Try connecting working LEFT speaker with working cable to the CENTER output (this will test the output of receiver if OK - but use the Test Tone from Setup).

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I have similar problem with my Onkyo Tx-SR600. It only happens when it's in surround mode. When switch to Stereo or Direct, the scratchiness go away. Still trying to find a solution to this problem.

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Center Speaker Audio Very Distorted

Love your screen name.

You didn't say what, if anything, preceded the appearance of the problem. There might be a clue.

Can you describe the distortion? Is it excessively bassy? If so, is it happening on all sources?

I'm assuming this is a modern digital receiver that is capable of many soundfield simulations as well as native Dolby Digital, DTS, multi-channel. If so we can use a stereo source and through simulation redirect some of it to the center speaker.

Using one of your receiver's many multi-channel simulation modes, put in a CD or tune an FM station and use it to diagnose the problem during later steps.

If it's only a single source and that source uses individual analog channel RCA cables, swap in another one or temporarily move the Center Channel feed to one of the other channels to see if it's before the receiver (in the source).or inside the receiver.

For multiple sources:

Is your Center speaker defined properly as Large or Small in the receiver's setup menu?The size refers mostly to the bass-handling capacities of all your speakers rather than their physical size. Speakers designated as 'Small' will not be sent much in the way of bass because they can't handle it well. The LFE/subwoofer channel(s) will get all the bass that was intended for them instead.

If you have a Small speaker improperly defined as Large it may be getting bass that it can't handle and that might sound like distortion. Having a Large speaker defiend as Small would result in less bass than expected but otherwise 'clean' sound.

Check the speaker setup in the menu for excessive volume level relative to the others. There is usually a calibration procedure the receiver will use to help you adjust the subjective voume of each speaker using white noise or tones.

Hope this helps.

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Unhook your center channel speaker and see if it still goes into protect.You might have bad center speaker

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Yes Mark, You have a problem with a componet with that center channel. If your not a tech, dont have a schematic, or dont have any training in troubleshooting solid state electronics, unhook everythuing and take it into a repair senter for an estimate, as unless you know how to chech the parts you can cause more damage to the unit as it takes one slip and boom, all gone. Good Luck

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