Stereo Wont work above 1k RPM?

[Cold Fusion]

hey i recently put my head unit into me new car and for some reason when i rev above 1k rpm it cits out the music, the CD still plays but no sound comes out? it will happen 80% of the time too, sometimes will work over 1k RPM but then will just cut out randomly?

can anyone tell me how i can make it work properly? the head unit worked perfectly fine in my old car, never had a problem with it...

Thanks

[Alt_F4]

Sounds like it might be the alternator, barring silly wiring errors like earthing speakers to chassis etc.
Using onboard, or external amp?

[Cold Fusion]

external AMP now, but it was still not working when i only had Head unit and factory speakers with no amp at all...

[Alt_F4]

Yeah either alternator is on the way out, or your having issues with power supply (eg. bad earthing somewhere) to the head unit and/or amp.

More likely to be the latter if you have no other symptoms like random stalling or dead batteries.

[Cold Fusion]

ok update, it works when the car isnt turned on, but it wont work at all now if the car is on... so u reckon that means its the altenator? hopefully it aint the alternator!

cheers for ur help!

[kizzer]

this actually happend in my car when the alt failed

just test the alt with a multi meter

[ben351]

Milhouses laser i brought off him ended up with similar problem

when stereo was turned above 17 the car had a 2.5k limiter in all gears ... never got around to fixing it tho ... sold it to BBK and he got it yellowed doing reverse nuts in an industrial area