Amp keeps cutting-out with high treble ..help

juno_first

juno_first

juno_first

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A year ago I bought a 5:1 speaker system & have recently started using it for 5:1 with films.

Its a 5:1 (5 small satellites/sub) & I got it from Overclockers as being sold as 160w & cost £180 I think.

Heres the model number
Amp.gif


I've noticed new media, especially HD with AC3 5:1 audio has nice high quality sound, although whenever theres any high frequencies in a film, eg. with a gunshot or glass breaking etc. my amp immediately turns its volume down to mute.
The bass is great & increasing this has no adverse effects.

With the volume at a normal/loud level when watching a film, if I set the treble anymore than the level below, the amp eventually mutes itself.
This level of treble really depreciates the quality of the sound with everything sounding muffled.
I have the AC3 codec set to default with surround/voice levels etc. & even adjusting these levels & reducing bass does not help.
This cutting-off mostly happens with 5:1 media.

treble.gif


Does anyone have any ideas whats wrong?
I've had to setup another stereo amp/speakers for the front, with the treble turned up as a jerry rigged fix :eek:
 
Hmmm... a little more info might help.

Are you playing through PC? and with which software? Are you using AC3 Filter for the sound, or proprietary drivers/codecs?

It's possible there's a hardware issue, but you need to look at software & hardware in isolation if possible.

As a starting point, see if you can try the speaker system with other hardware (eg, standalone DVD player).

The next logical step is to look at both software and hardware settings to see if there are any 'Attenuation' or 'Peak Clipping' type options enabled. They're designed to protect speakers, but perhaps the current settings are too sensitive...
 
Hmm yer I should try a different input to rule out the PC.
Mostly its the AC3 filter that 'trips' the amp but come to think of it, never with Winamp, so maybe its a 5:1 issue?
I dont have another 5:1 input to test though.
Deffo the amp is 'Peak Clipping' with high freq. & the speakers are small flat panel thingys which may be creating a surge or something. I could test by unplugging speakers?
 
Ahh...

I just tried Winamp:
Using only 2 front speakers (stereo) the amp never trips out
BUT
When activating Creative CMSS (which pumps audio to rear/centre/sub) the amp trips straight away.
 
Ahh...

Kinda figured it out:

Everything works great until any speaker is plugged into the centre output of the amp, so now I need a way of reducing treble to centre input only lol.
 
Good work so far!

Another thought - if you are indeed using a Creative card, do you have any other options which increase the treble/volume of the centre channel?

Sometimes we tend to over-increase the centre channel volume for clearer vocals, for example.

Another issue I found with my sound card was using the '24-bit Crystaliser' which supposedly makes the audio clearer, but in essence seemed to just boost the treble.

In other words, check you aren't boosting treble to an already boosted signal...

That's the trouble with treble...
 
I've got an Audigy2 so no '24-bit Crystaliser' , few... well unless I figure out how get ffdshow to emulate it in Vista64.

Right now I'm testing & trying to get the centre speaker output the highest volume with enough treble by lowering the centre output in Windows volume controls, which will at least give all the other speakers enough treble, also 'voice' control in the AC3 filter.

With Vista I had to install SP1 to get EAX/surround.
 
FIXED
Just replaced the centre speaker with a better speaker.
It wasn't the amp, it was the speakers all all the time, sounds like over the year these flat panel speakers have become damaged somehow & now surge the amp.
 
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