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4xGmc
02-28-2007, 12:39 AM
Hello. I have an kdc-mp5032 kenwood cd player and i get a thumping noise from my subwoofer output. Its ran to an aura amp the only time i notice it is when the cd is switching songs the pause between tracks and its loud and repetitive thump thump thump any ideas?

baseballer1100
02-28-2007, 12:41 AM
Maybe the phase?

4xGmc
02-28-2007, 12:44 AM
hmmm i do have a setting for normal or rev but i havent tried it

baseballer1100
02-28-2007, 12:45 AM
Well that happend on mine but it didnt play anything at all? so maybe its not just a thought though.

4xGmc
02-28-2007, 12:56 AM
nope just tried the phase didnt make any diff

baseballer1100
02-28-2007, 02:15 PM
Well then.

Prowler573
02-28-2007, 02:20 PM
Are you certain that it's eminating from the sub outputs on the deck and not being caused by the amp itself?

Generally a repetitive "thump thump" noise is indicative of a bad ground in my experience...

jdawg
02-28-2007, 02:30 PM
I have heard old worn out cd players do this. Not familiar with what year that model is

Prowler573
02-28-2007, 02:33 PM
IIRC the 5032 is last year's model ('06)

mrogowski
02-28-2007, 02:39 PM
I have heard old worn out cd players do this. Not familiar with what year that model is

*ding*

If the thumping is occuring at a fairly high rate - say 200 times per minute - its your player.

Best,
Mark

btlking
02-28-2007, 02:43 PM
when does it "bump" is it when your driving or sitting still if its when your driving or your car is moving at all check your ground i had the same problem

Prowler573
02-28-2007, 02:45 PM
*ding*

If the thumping is occuring at a fairly high rate - say 200 times per minute - its your player.

Best,
Mark

If it was the unit itself creating the issue due to worn-out internals wouldn't it most likely reproduce the anomoly through all of the preouts rather than only the sub preouts?

mrogowski
02-28-2007, 02:57 PM
If it was the unit itself creating the issue due to worn-out internals wouldn't it most likely reproduce the anomoly through all of the preouts rather than only the sub preouts?

Actually, you're right. My fault for not reading everything. Good catch..

Best,
Mark

jdawg
02-28-2007, 03:55 PM
usaully its a low frequency noise, he probably has just subs and other speakers ran through the deck, so more than likely its just not as audible

woody89
02-28-2007, 04:21 PM
You could be getting ground noises. Try grounding your rca's on the back of your head unit. But I did what is showed in this thread and fixed the problem.

http://www.caraudio.com/forum/showthread.php?t=198477

4xGmc
02-28-2007, 11:38 PM
Ok I tried grounding the rca's it helped some but it was still there also it only does it while playing a cd and it doesnt do it with any other outputs just the sub out and the player is only 2 months old

naiku
03-01-2007, 09:37 AM
Ok I tried grounding the rca's it helped some but it was still there also it only does it while playing a cd and it doesnt do it with any other outputs just the sub out and the player is only 2 months old

I have a similar problem, I get a thump from my sub when I change source/station but not when changing CD tracks. I already grounded my RCA's, and have my HU grounded directly to the battery, next I plan to try re-grounding my amp, and then grounding my HU and amp to the same spot.

If none of that works then I am stuck. I keep thinking I should not have bought the Pioneer I have but a used older Alpine instead.