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audible noise in system


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astro88 
Copper - Posts: 195
Copper spacespace
Joined: December 01, 2003
Location: Canada
Posted: April 14, 2006 at 5:05 PM / IP Logged  

Hi all im havin a problem with my system i hope you's can help.

system is head Alpine 9815

sub amp kicker dx 700,kicker L7 sub

ive had the system thumpin no prob with highs runnin off of deck but now ive hooked an an amp to do the highs instead of the deck and ive got noise in the sub that i cant figure out.

ive gone through a pg amp,a orion 225 hcca and now ive got a zapco there(ag200)For the highs.

ive found that the noise sounds like a heartbeat,with or without the car running.

tried different ground locations,tried different rca's,unhooked the subwoofer and the noise was gone,plugged back in, back

unhooked rca's to sub and noise gone,tried putting signal to sub amp from rear rca's noise still there?

what now? if anyone can help, i'd appreciate.

forbidden 
Platinum - Posts: 5,352
Platinum spaceThis member has made a donation to the12volt.com. Click here for more info.spaceThis member has been recognized as an authority in Mobile Audio and Video. Click here for more info.spacespace
Joined: November 01, 2003
Location: Alberta, Canada
Posted: April 14, 2006 at 5:27 PM / IP Logged  
You need to try a different head unit next.
Top Secret, I can tell you but then my wife will kill me.
astro88 
Copper - Posts: 195
Copper spacespace
Joined: December 01, 2003
Location: Canada
Posted: April 14, 2006 at 5:42 PM / IP Logged  

really,that sucks, but thats what i was afraid of.but the subs never made noise b4 introducing the new amp.x3

and the new amp makes no noise without the sub amp?,tommorow ill see if the sub amp still does it without  the zapco......

I even tried running rear rca's(no noise in system)through the output of the dx,to full pass to the zapco and still the noise persists???

astro88 
Copper - Posts: 195
Copper spacespace
Joined: December 01, 2003
Location: Canada
Posted: April 15, 2006 at 7:49 AM / IP Logged  

Persistence pays off!, acually it was my fault lol.

broke the classic amp munting rule, the chassis of the kicker amp was touching the metal were it was grounded,fixed the with some rubber gaskets and that fixed er right up!

thanx for youre time.


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