Bass loss... (UPDATE) - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Audio (and aftermarket electronics) This is your place for alarms, remote starters, to brag about your system, exaggerate your db levels, or simply ask questions for stock or aftermarket audio. No Flames! (except from roasted amps)

Reply
 
 
 
Thread Tools Search this Thread
Old 06-13-2004, 04:26 AM   #1
Senior Member
Certified Car Nut
Thread Starter
 
Join Date: Mar 2003
Posts: 12,432
Thanks: 0
Thanked 0 Times in 0 Posts
J Wikoff is on a distinguished road
Default Bass loss... (UPDATE)

I've got the factory gain control and amp, with woofer leads fed to a 2 channel sub amp. When I start the car, most times the subs are powered for a few seconds, then die out for a minute. They usually come back on with a click through the speakers, and anything electrical on will dim very momentarily, like headlights, dash, etc. Usually the kick in seems to accompany a little stab at the throttle, sometimes all on it'* own.

My setup: stock gain control and amp, fed into sub amp with RCA convertors, 1 farad Rockford Fosgate cap on sub amp power lead, and 2 10" Pioneer Premiers. Pioneer 6x9'* powered by 300W amp fed by other factory leads for 6x9'*.

I've checked all my grounds, nice and tight and clean. BTW, everything grounds to the same point, both amps and cap. Any ideas?

I've also got whine. Comes and goes in intensity, changes pitch with engine speed. Sometimes hitting the door locks or moving a window will instantly kill the whine, but it comes back soon. I've got a ground loop isolator on the 6x9 amp, the only speakers it comes through. No change. It seems to almost disappear when I used stock spark plug wires vs. my MSD 8.5mm wires. Is there anything I can do about it?
J Wikoff is offline   Reply With Quote
Old 06-13-2004, 11:35 AM   #2
Senior Member
True Car Nut
 
Join Date: Feb 2004
Location: Western MA
Posts: 2,708
Thanks: 0
Thanked 1 Time in 1 Post
randman1 is on a distinguished road
Default

Are both amps connected to the cap or just the sub amp?

Hmmm...alternator whine usually = ground differential and dim lights, etc usually = excessive current drain.

My first guess would be thermal protection shutdown in the sub amp. Let'* see what the big boys of audio think though.
randman1 is offline   Reply With Quote
Old 06-13-2004, 01:43 PM   #3
Senior Member
Posts like a Camaro
 
Join Date: Dec 2003
Location: Massachusetts
Posts: 1,019
Thanks: 0
Thanked 0 Times in 0 Posts
CFoote is on a distinguished road
Default

I'm not sure about the amps, but the whine is usually a bad ground. I know you said everything is grounded to one point, which is great. At this point though, I would try another ground point. Any chance you could ground 'em to the seat belt bolt? Thats usually a good ground point. Make sure you (carefully) scrape away any paint.

As far as the amps go, thats a mystery. You could try running a temporary turn on lead to each amp directly from the battery to see if that solves the problem.
CFoote is offline   Reply With Quote
Old 06-13-2004, 04:39 PM   #4
Junior Member
Posts like a Ricer Type-R
 
Join Date: Jun 2004
Location: columbus ohio
Posts: 12
Thanks: 0
Thanked 0 Times in 0 Posts
birdman is on a distinguished road
Default

what size amp and speakers r u running? i've had about 1600 watts running on my 90 bonne and only noticed a slight dim in the lights, no whine. i would disconnect the factory gain and amp from the rest and see how it does. if still the same check your alt.
birdman is offline   Reply With Quote
Old 06-13-2004, 05:43 PM   #5
Senior Member
Posts like a Corvette
 
Join Date: Oct 2002
Location: N.W. Indiana
Posts: 1,206
Thanks: 0
Thanked 0 Times in 0 Posts
Roadrash187 is on a distinguished road
Default

You can try this out. See if it helps any.

http://www.bonnevilleclub.com/forum/...tion+checklist
Roadrash187 is offline   Reply With Quote
Old 06-13-2004, 10:11 PM   #6
Senior Member
Certified Car Nut
 
Join Date: Jun 2003
Posts: 15,928
Thanks: 0
Thanked 0 Times in 0 Posts
BonneMeMN is on a distinguished road
Default

The MSD wires will give more feedback (whine) then stockers.
BonneMeMN is offline   Reply With Quote
Old 06-16-2004, 03:09 AM   #7
Senior Member
Certified Car Nut
Thread Starter
 
Join Date: Mar 2003
Posts: 12,432
Thanks: 0
Thanked 0 Times in 0 Posts
J Wikoff is on a distinguished road
Default

Any ideas on the subs cutting out?
J Wikoff is offline   Reply With Quote
Old 02-09-2005, 05:33 PM   #8
Senior Member
Certified Car Nut
Thread Starter
 
Join Date: Mar 2003
Posts: 12,432
Thanks: 0
Thanked 0 Times in 0 Posts
J Wikoff is on a distinguished road
Default

This is still happening. Moved all the grounds to a clean spot.

I did mostly fix the whine, it seems. I put a 12" cable on my negative battery cable and ran it to the top post of my Optima cause my side terminal stripped out. Now the whine is nearly unnoticible. Would the alternator upgrade cable from ZZP further fix the whine?

Oh, the voltage readout on my cap is only a few volts until the subs kick on, then it jumps to normal.
J Wikoff is offline   Reply With Quote
Old 02-09-2005, 05:38 PM   #9
Senior Member
Certified Car Nut
 
Join Date: Oct 2003
Posts: 19,756
Thanks: 0
Thanked 0 Times in 0 Posts
1993 SLE is on a distinguished road
Default

Quote:
Originally Posted by jwikoff99
This is still happening. Moved all the grounds to a clean spot.

I did mostly fix the whine, it seems. I put a 12" cable on my negative battery cable and ran it to the top post of my Optima cause my side terminal stripped out. Now the whine is nearly unnoticible. Would the alternator upgrade cable from ZZP further fix the whine?

Oh, the voltage readout on my cap is only a few volts until the subs kick on, then it jumps to normal.
are any of your Speaker cables or RCA near any of the power wires?
1993 SLE is offline   Reply With Quote
Old 02-09-2005, 05:50 PM   #10
Senior Member
Certified Car Nut
Thread Starter
 
Join Date: Mar 2003
Posts: 12,432
Thanks: 0
Thanked 0 Times in 0 Posts
J Wikoff is on a distinguished road
Default

The main power lead runs next to the antenna feed for my 6 disk. There is some extra power and ground wiring coiled up under the box. I didn't cut it to length. Could that be a problem? It is on my to do list, however.
J Wikoff is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Coolant loss (can't find the leak) UPDATE with plug photos charliemax 1992-1999 20 11-19-2006 04:21 PM
Loss of bass after HU Ryfly05 Audio (and aftermarket electronics) 1 08-19-2005 07:40 AM
Dash trim removal with bass boost slide control mtrunz Audio (and aftermarket electronics) 1 04-11-2003 03:18 PM
Cheap Way to Tighten Up Rear Bass? StoopidSavant Audio (and aftermarket electronics) 12 03-27-2003 03:38 PM
My power loss update Bassplayincrowe 1992-1999 5 01-28-2003 11:44 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 07:05 PM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.