----- Original Message -----
Sent: Sunday, October 06, 2002 8:33
AM
Subject: Re: [Chevelle-List] Stereo
question.
Hey Rodney,
I checked the link but that's not going to help. My
system doesn't thump when I turn it on, it thumps when it's already on and
then the electric engine cooling fans kick on.
As for the cap, from what I've read about them, you're
right, but my understanding is they also act like a shock absorber of sorts
for power spikes such as what I think is happening when my fans kick on and
the alternator suddenly increases its output.
cYa-
Herb
----- Original Message -----
Sent: Saturday, October 05, 2002 11:53
PM
Subject: Re: [Chevelle-List] Stereo
question.
Hey Herb,
I don't think a cap will prohibit this "thump"
sound from happening. My understanding of a cap is that it "stores"
power so that when you hit a deep bass note, it'll hit with full force
or power. You're obviously getting enough power to make this "thump"
sound so you shouldn't need more power from a reserve storage of
power. If anything that'll make the "thump" sound
stronger. The cap is usually for a problem like your
when your headlights dim at night when deep bass notes are played. The
normal power from the battery runs the headlights (and everything else) at a
consistent power level and then the deep bass note uses the normal power
plus whatever reserve power is stored in the cap.
Rodney.
71 Chevelle
El Mirage, AZ
----- Original Message -----
Sent: Saturday, October 05, 2002 5:09
PM
Subject: [Chevelle-List] Stereo
question.
Ok all you stereo gurus... Hopefully somebody can
help, the guys at the local stereo store are stumped.
If I have my stereo on (not loud but normal listening
volume) and the electric fans kick on, I get a huge thump through the
woofers.
The alternator is a CS130 putting out 105
amps. The fans turn on/off with a thermo switch through a pair of
relays. The sub amp is running 6 gauge power wire directly off the
battery and the fans' main power feed off the alternator.
It sounds to me like the fans are causing the alternator
to suddenly put out some juice and the sudden power output is causing a
surge through the system resulting in a huge thump through the
woofers. Am I on the right track or way off base? (no pun
intended) Will one of those big capacitors in the power line to the
amp absorb the surge or do I need to try something else?
Thanks.
cYa-
