FM signal dead after installing capacitor.

[MaydayVFR]

Hi guys, long time listener first time caller. I can't seem to find this question anywhere else so here we go. I've been into car audio since I was 16. Now I'm 30 and revisiting the realm of subwoofers. I have an 04 sti that I have had wired for amp and subs for about 10 years. I sold my sub long ago and have been in the quest to get more base. Enter the current set up. 1200w max amp and 12" kicker compvr. I also had a capacitor laying around. Let's leave the capacitor debate off the table but here's the problem.

Now that it's wired and working, fm signals are almost non existent. However, Kill the amp and capacitor and it's perfect signal. All was working fine with no loss of signal before the capacitor got wired in. Cap and amp are grounded separately. Pos is battery to cap to amp. I may have just answered my own question but the sti radio antenna is run through its rear window and engrained in the glass. Is it possible the ground is too close to the antenna causing the signal loss? Also I've noticed If there's nO power demand there's no signal loss while amp is on. So big hits==Cap in action which == low signal.

Sorry that's long but thanks in advance.

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[ilikeradios 10+ year member]

So you have a 600 watt RMS amp, you install a capacitor even though everyone with knowledge knows it doesn't do ****, then it messes with your FM, tell me again why you feel you need a capacitor?

 

[MaydayVFR]

Light/gauge dim. That was my issue. Yes I know they don't make everything sound better as people claim or man now my amps getting so much more power or whatever snake oil claim you wish to insert here but I've had this cap forever. Maybe it's old. Maybe that's the issue. Bah. Never mind. Guess I'll figure it out on my own then. Hey thanks for your help man.

 

[ashren315]

A capacitor won't fix that.

And I don't see how it is even remotely possible to **** up tye FM on a radio by installing a capacitor on an amp.

John Kuthe, is that you?

 

[tommydh 10+ year member]

Did you by chance run any of your power close to the antenna wiring? is it a powered antenna?