Feedback from mid/tweeter

leithm · 04-22-2008, 03:27 PM

Hi guys,

I've got wharfedale 9.6 speakers with a denon 2802 amp

Get quite a bit of noise from the mid/tweeters. It's not noticable about 2feet away from the speakers but i don't want any!

I've tried arranging cables so power cables aren't overlapping. I've bi wired the speakers(sounds better!) but that didn't help.

Could it be that i've damaged the speakers or the amp just isn't that good ?

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Wayne A. Pflughaupt · 04-23-2008, 11:21 AM

Welcome to the Forum, Lieth!

What kind of noise? Hiss? Hum? I doubt it’s feedback, seeing how that’s the screeching sound you get from a microphone being too close to a speaker...

Regards,
Wayne A. Pflughaupt

leithm · 04-23-2008, 03:31 PM

its a hiss!

And thanks hi

Wayne A. Pflughaupt · 04-23-2008, 04:05 PM

If it’s a low-level thing that you have to get near the speaker to hear, it’s from the electronics, not the speaker.

Regards,
Wayne A. Pflughaupt

JohnRice · 04-23-2008, 04:19 PM

If you could take the effort to more fully describe the problem and the sound you would help people like Wayne to give you a constructive answer, rather than having to keep asking questions and making blind guesses.

leithm · 04-23-2008, 05:24 PM

Sorry I'm not that clued up on the technical side of things when it comes to audio.

Yes it's a hiss thats coming from the mid/tweeter that increases with volume. It's audiable from about 2 feet away. Any further and you can't hear it.

Wayne, when you say the electronics, what do you mean? I really want to elminate it

Wayne A. Pflughaupt · 04-23-2008, 10:02 PM

Well, all electronics have some residual background noise (so-called signal to noise ratio), but you shouldn’t be able to hear it from a couple of feet back. Each component in the signal chain can contribute, but typically if there’s a problem like you’re describing it can be traced to one component in particular. If you’ve noticed it when using a particular source, but not others, then there’s the problem. If not, try disconnecting all components and adding them back one at a time and maybe you’ll notice the noise level jumps up when a particular unit is added. (Be sure the receiver is turned all the way down when making connections.) Of course, while everything’s unplugged check a few vacant inputs, just to give you an idea of what the Denon does all by itself, ‘cause it’ll be your baseline. Make sense?

Regards,
Wayne A. Pflughaupt

leithm · 04-23-2008, 10:23 PM

Yup, it does thanks. I've read a few articles surrounding this and it must be the denon itself. I've tried it with all inputs disconnected.

The only other thing I can think of is trying a different set of speakers. Ah well - Could probably use a new amp with a bit more power

AlexND · 04-24-2008, 08:17 AM

I know I'm just a newbie myself, but as a sound tech for a church I had to answer this. . .

As was mentioned before, all audio equipment has a noise/signal issue. It's something any audiophile will have to contend with. However, one trick is to increase your input signal, turning down your amp as you go, until just before you hear 'clipping' of your high-end sounds. If any of your input equipment has its own volume control, you might try this out. If this doesn't work, then it does have to be your amp.

Hope this helps!

Alex



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