losing bass

fridgidy · 14th February 2011, 05:02 PM

Hey guys. I'm somewhat of a newbie compare to most of you on here and I can't figure out whats causing my car audio system to lose bass. I have an alpine cda-117 hu hooked up to an 1000.1bd Rockford Fosgate amp and 2 12" Elemental design dv.2 subs. Every once and awhile I lose bass from my subs never completely you can always here a little thump but its almost always at least a little less than normal. It does it a lot on the highway I have little bass and sometimes when I hit bumps it fixes. I thought maybe a loose connection somewhere but what would cause it to lose bass somewhat but never totally? I used a volt meter and when its not working properly its like 12v and when it works right its over 14v. I don't really understand what that means. Could someone help me with this please it gets quite annoying hearing bass going in and out over and over again ?

firechief · 14th February 2011, 06:17 PM

When you measure the voltage is the car running? Is the music turned up loud? The loose connection idea is likely, and that could be a loose connection in the amp itself. Are you running just two subs? or is there more to the system than that?

Perry Babin · 14th February 2011, 06:34 PM

One RCA signal line may have a loose connection. Losing half of the signal could cause the symptoms you described.

fridgidy · 14th February 2011, 07:15 PM

Yea the car is running and the music is almost full blast. I only have the 2 subs hooked to the amp. I hope its not a loose connection in the amp cause I have no idea how to fix that.

fridgidy · 14th February 2011, 07:18 PM

Quote:

Originally Posted by Perry Babin

One RCA signal line may have a loose connection. Losing half of the signal could cause the symptoms you described.

I thought possibly the rcas too. I will have to check and make sure those are fine from end to end. If so I'll replace it too and see if that fixes it. Thanks.

Perry Babin · 14th February 2011, 07:22 PM

Unplug one of the RCA plugs from the RCA jacks on the amp to see if it's the same as when you lose output.

fridgidy · 14th February 2011, 07:58 PM

thats easy enough I will try that and see.

fridgidy · 14th February 2011, 08:26 PM

I tried the unplugging each rca and it hardly made any diffrence at all plugged or unplugged. It sounded still pretty much normal. Its hard to fix when it working fine now but it happens almost all the time and it dosent have to be loud to do it either. I drove home this morning on the highway and the bass kept going less are more over and over the whole way.

Perry Babin · 14th February 2011, 08:36 PM

It could be a bad connection on a woofer (wiring between amp and woofer) or a failing lead-in wire on one of the woofers.

fridgidy · 15th February 2011, 04:06 PM

ok thanks I'll have to open up the box and take a look at it when I get a chance its a freaking blizzard over here right now lol

14th February 2011, 05:02 PM	#1
fridgidy diyAudio Member Join Date: Feb 2007 Location: Nova SCotia	losing bass Hey guys. I'm somewhat of a newbie compare to most of you on here and I can't figure out whats causing my car audio system to lose bass. I have an alpine cda-117 hu hooked up to an 1000.1bd Rockford Fosgate amp and 2 12" Elemental design dv.2 subs. Every once and awhile I lose bass from my subs never completely you can always here a little thump but its almost always at least a little less than normal. It does it a lot on the highway I have little bass and sometimes when I hit bumps it fixes. I thought maybe a loose connection somewhere but what would cause it to lose bass somewhat but never totally? I used a volt meter and when its not working properly its like 12v and when it works right its over 14v. I don't really understand what that means. Could someone help me with this please it gets quite annoying hearing bass going in and out over and over again ?

14th February 2011, 06:34 PM	#3
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	One RCA signal line may have a loose connection. Losing half of the signal could cause the symptoms you described. __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

14th February 2011, 07:22 PM	#6
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	Unplug one of the RCA plugs from the RCA jacks on the amp to see if it's the same as when you lose output. __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

14th February 2011, 08:36 PM	#9
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	It could be a bad connection on a woofer (wiring between amp and woofer) or a failing lead-in wire on one of the woofers. __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

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14th February 2011, 06:17 PM	#2
firechief diyAudio Member Join Date: Sep 2008 Location: Near Seattle Wa	When you measure the voltage is the car running? Is the music turned up loud? The loose connection idea is likely, and that could be a loose connection in the amp itself. Are you running just two subs? or is there more to the system than that?

14th February 2011, 07:15 PM	#4
fridgidy diyAudio Member Join Date: Feb 2007 Location: Nova SCotia	Yea the car is running and the music is almost full blast. I only have the 2 subs hooked to the amp. I hope its not a loose connection in the amp cause I have no idea how to fix that.

14th February 2011, 07:58 PM	#7
fridgidy diyAudio Member Join Date: Feb 2007 Location: Nova SCotia	thats easy enough I will try that and see.

14th February 2011, 08:26 PM	#8
fridgidy diyAudio Member Join Date: Feb 2007 Location: Nova SCotia	I tried the unplugging each rca and it hardly made any diffrence at all plugged or unplugged. It sounded still pretty much normal. Its hard to fix when it working fine now but it happens almost all the time and it dosent have to be loud to do it either. I drove home this morning on the highway and the bass kept going less are more over and over the whole way.

15th February 2011, 04:06 PM	#10
fridgidy diyAudio Member Join Date: Feb 2007 Location: Nova SCotia	ok thanks I'll have to open up the box and take a look at it when I get a chance its a freaking blizzard over here right now lol

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