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smartroad
MAME Fan
Reged: 05/12/06
Posts: 27
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Noise on amp
02/16/11 08:00 PM


I have (finally) built myself a little Mame cabinet. I am however having issues with the amplifier I am using. The amp is this 40w one from Maplin (http://www.maplin.co.uk/40w-power-amplifier-module-37737) which I want to run off of the PC supply that supplies the computer too. It works, but when I plug the amp into the soundcard of the computer I get a load of noise out of it (plus the sounds that should be there). It sounds like all the motors within the case are being picked up, I can hear when the HDD accesses, a note change if I slow down the cabinets cooling fan etc. However if I then plug the amp into my MP3 player it is totally clear of any noise.

I am at a loss, how can I get so much unwanted noise from the computer, yet unplug it from the PC and plug it into something else and it is fine.

The only thing I have found on the net is in relation to car amps having a similar issue and them isolating the audio from the headunit to the amp with this black box.

I have the amp wired to the PSU via a molex connector and running off of 12V.

Does anyone have any suggestions?

Many thanks for any assistance you can offer!


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Entire thread
Subject Posted by Posted on
* Noise on amp smartroad 02/16/11 08:00 PM
. * Re: Noise on amp krick  02/18/11 06:00 AM
. * Re: Noise on amp smartroad  02/20/11 11:23 PM
. * Re: Noise on amp krick  02/20/11 11:31 PM
. * Re: Noise on amp smartroad  02/21/11 12:39 AM
. * Re: Noise on amp R. Belmont  02/17/11 04:13 PM
. * Re: Noise on amp keshbach1  02/17/11 09:20 PM
. * Re: Noise on amp redk9258  02/17/11 10:10 PM
. * Re: Noise on amp redk9258  02/16/11 09:58 PM

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