AMP Problems !!! Help Plz !!!

[DawsonWicked]

basically i got one of them jbl subs 1000 watt in a box with wadding for best performance. and iv got one of them ebay amps the dead cheap ones

http://cgi.ebay.co.uk/NEW-400-WATT-KOAC-LTD-EDITION-CAR-AMP-AMPLIFIER-BK-UK_W0QQitemZ230151678688QQihZ013QQcategoryZ122182Q QrdZ1QQcmdZViewItem

and it works like a dream unitl i turn the engine on and its whistles like mad and gets louder when i rev the car sooo whats happening and btw i dont have a voltmeter lol. and how do i cure it iv tried 2 different earth spots and it runs the amp fine then the engine makes it whitstle. how can i stop this from happening thanks. btw the earths are bare metal and to the chassis lads and girls thanks. :y:

[MickMc]

Dnt buy a dead cheap amp lol , always buy a brand that you know and that have gotten good reviews , the simlpe answer is there is no way to stop the whistling noise

[brianS]

if the earth doesnt sort it you can always get a surpressor which apparently stops alternator whine (which is what you are experienceing)

[DawsonWicked]

alright tar guys !!