Capacitor trouble

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chisam14

Member - Posts: 37

Joined: July 31, 2004

Location: United States

Posted: May 09, 2005 at 10:16 PM / IP Logged

I have a Digital Audio 1.5 Farad cap with a digital voltage display. It is mounted in the trunk about 6 in away from my amp. The problem is a high pitched noise coming from my trunk and I'm almost positive it is not my amp. I don't know if caps are capable of producing the sound, but if they are please let me know how to fix it.

kfr01

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Joined: April 30, 2003

Posted: May 09, 2005 at 10:27 PM / IP Logged

What does the voltage display read?

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haemphyst

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Joined: January 19, 2003

Location: Michigan, Bouvet Island

Posted: May 09, 2005 at 10:28 PM / IP Logged

I'd be willing to BET it is your amp... It's called a switching power supply, and caps don't have or need one... What kind of amp is it? What kind of cap is it? (not that it matters)

It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."

sedate

Silver - Posts: 1,173

Joined: July 03, 2004

Location: Colorado, United States

Posted: May 09, 2005 at 10:46 PM / IP Logged

I've heard caps whine loudly when the voltage drops below a certain point.. my cap starts screaming when the volts drop below 10.5... its really annoying. I guess the only time it ever goes off is when the stereo is blasting tho.. so I can't really hear it over the rear speakers and what-not.

hamfist: 'switching power supply?' would this produce the noise by its function or is this noise, in the above case of the cap, produced by the amp on purpose to alert the operator of something?

"I'm finished!" - Daniel Plainview

chisam14

Member - Posts: 37

Joined: July 31, 2004

Location: United States

Posted: May 10, 2005 at 1:11 PM / IP Logged

It is a Digital Audio amp and a Digital Audio cap. The voltage never drops below 12.5 when running wide open. You can only hear it at low volumes because the stereo drowns it out.

Mvap

Member - Posts: 46

Joined: May 07, 2005

Location: United States

Posted: May 10, 2005 at 2:14 PM / IP Logged

I've heard ( I don't know if it is true) if you run your RCA cables along side your power wire you can get engine whine / noise!!

If so try running them on separate sides of the car!

I love Car Audio!

AudioZBahn

Member - Posts: 31

Joined: April 22, 2005

Posted: May 10, 2005 at 2:18 PM / IP Logged

For some reason my cap started smoking when I tryed to install it, now it will only charge above 4.5v. Does anyone know what the problem is.

jstruckman

Copper - Posts: 465

Joined: May 03, 2004

Posted: May 10, 2005 at 3:06 PM / IP Logged

AudioZBahn, you should probably start another thread with your question.

chisam14, are you sure the high pitched noise is not coming from your speakers in the back, or does it actually sound like the cap or amp. Now someone correct me if i am wrong, but Digital Audio is made by audiobahn (the cheaper version, and equally crappy equipment), so it could be quite possible that either one of those.

Jazzy

Mvap

Member - Posts: 46

Joined: May 07, 2005

Location: United States

Posted: May 11, 2005 at 2:26 AM / IP Logged

I would assume the interior speakers are connected to this amp?

How can you hear noise from the rear area but nothing from the front.??

Are the speakers connected directly to the radio?

Because if it never did this before, it has to be something you did differently!!!!

I love Car Audio!

chisam14

Member - Posts: 37

Joined: July 31, 2004

Location: United States

Posted: May 11, 2005 at 6:23 PM / IP Logged

All the interior speakers are run off of the hu. It is not coming from any of the speakers. The system has been in the car for about a year. The noise just started a couple of weeks ago, without doing anything to the system.

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