Is my amp blown?
08-28-2007, 03:50 PM
#1
Is my amp blown?
Ok, i have the stock 6 c/d head unit with an Infinity 6 channel amp and a JBL cleansweep connected. Few days ago i was crankin tunes.. all of a sudden my right front door speaker began to make a really high pitched whistle sound comeing through what i believe was the tweeters, but even after turning off the stereo the sound wouldnt stop and it was piercing, so i turned off the truck. Turned it back on same thing, screaching sound comeing from the door speaker even though the stereo was off. After doing that a few times it finaly went away but then it sounded like i might have blown my speaker. So today i swapped the drivers door speaker and it did the same thing, sounded blown.. but both speaker sound great in the drivers side door..Amp works great on all the other channels. Then i switched the right and left speaker RCA's on the amp and the passanger door still sounded blown.Is my amp/channel blown? Ty in advance for any replys.
08-28-2007, 04:20 PM
#2
Senior Member
Sounds like you've done a good job so far with troubleshooting, essentially eliminating the head unit and the speakers as the problems.
I'm not sure what a 'cleansweep' is or what it does, but at any rate, you've rolled the inputs to the amp as well as the speakers, and the problem stayed put. If you roll the outputs from the amp and the problem now moves, I'd almost bet real money on the problem being with the amp.
I'm not sure what a 'cleansweep' is or what it does, but at any rate, you've rolled the inputs to the amp as well as the speakers, and the problem stayed put. If you roll the outputs from the amp and the problem now moves, I'd almost bet real money on the problem being with the amp.
08-28-2007, 04:44 PM
#3
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Either the amp is blown or you've got a bad ground coming from the amp. Check the ground wire coming from the amp and to wherever it is grounded at.
08-28-2007, 05:10 PM
#4
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I'm not sure of how everything is ran but you might want to get another set of wires and hook them up to whereever they are. run them directly to the speaker that isn't working from the amp if that is where they come from.
08-28-2007, 05:26 PM
#5
Sounds like you've done a good job so far with troubleshooting, essentially eliminating the head unit and the speakers as the problems.
I'm not sure what a 'cleansweep' is or what it does, but at any rate, you've rolled the inputs to the amp as well as the speakers, and the problem stayed put. If you roll the outputs from the amp and the problem now moves, I'd almost bet real money on the problem being with the amp.
I'm not sure what a 'cleansweep' is or what it does, but at any rate, you've rolled the inputs to the amp as well as the speakers, and the problem stayed put. If you roll the outputs from the amp and the problem now moves, I'd almost bet real money on the problem being with the amp.
It applys its 32 bit sharc DSP processor to automatically equalize each of the four channels with 30 bands of equalization (120 bands total), effectively correcting the response of almost any factory-equalized full-range signal. These digital-domain corrections will range from subtle to dramatic, depending on the degree of equalization engineering into the factory audio system.
For me it was a dramatic change to my stereo, night and day, crisp clean, sounds like a 1500.00 head unit.
Last edited by tg150; 08-28-2007 at 05:29 PM.
08-28-2007, 05:28 PM
#6
08-28-2007, 06:04 PM
#7
Senior Member
The short answer - Yes.
A longer answer (get ready - feeling a bit windy today!) - the fortunate part is that there is at least one good channel with which to compare against, making this exercise a bit easier than if all channels were affected.
If the system were drawn from start (power/ground) to finish (speakers) with everything in between, we know the problem has to be in there somewhere. Given the description, I assume that this 'cleansweep' thing-a-ma-jig is between the head unit and the amp.
When the RCA inputs to the amp were rolled and nothing changed, this essentially took everything upstream of the amp inputs out of the picture.
When the speakers were rolled and nothing changed - this took them out of the picture.
The only components left in the start-to-finish line-up that I can see are the amp and the output wiring.
The suggestion to roll the output wiring would be so to eliminate that possibility - if the problem moves, it's the amp. If nothing changes, then the wires would be suspect.
As mentioned in an earlier post - grounding and anything else associated with the amp (power feed and quality) are potential contributors. So be cautious before just deeming the amp proper as the problem. Offhand, I would think that a power / ground problem would show up as affecting all channels, and not just one as I understand is happening here.
A longer answer (get ready - feeling a bit windy today!) - the fortunate part is that there is at least one good channel with which to compare against, making this exercise a bit easier than if all channels were affected.
If the system were drawn from start (power/ground) to finish (speakers) with everything in between, we know the problem has to be in there somewhere. Given the description, I assume that this 'cleansweep' thing-a-ma-jig is between the head unit and the amp.
When the RCA inputs to the amp were rolled and nothing changed, this essentially took everything upstream of the amp inputs out of the picture.
When the speakers were rolled and nothing changed - this took them out of the picture.
The only components left in the start-to-finish line-up that I can see are the amp and the output wiring.
The suggestion to roll the output wiring would be so to eliminate that possibility - if the problem moves, it's the amp. If nothing changes, then the wires would be suspect.
As mentioned in an earlier post - grounding and anything else associated with the amp (power feed and quality) are potential contributors. So be cautious before just deeming the amp proper as the problem. Offhand, I would think that a power / ground problem would show up as affecting all channels, and not just one as I understand is happening here.
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08-28-2007, 06:19 PM
#8
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Yeah I'm thinking that it's the amp or an internal amp in the amp. If you've still got power to the amp then it's not completely blown and is fixable but will cost.
08-28-2007, 08:24 PM
#9
The short answer - Yes.
A longer answer (get ready - feeling a bit windy today!) - the fortunate part is that there is at least one good channel with which to compare against, making this exercise a bit easier than if all channels were affected.
If the system were drawn from start (power/ground) to finish (speakers) with everything in between, we know the problem has to be in there somewhere. Given the description, I assume that this 'cleansweep' thing-a-ma-jig is between the head unit and the amp.
When the RCA inputs to the amp were rolled and nothing changed, this essentially took everything upstream of the amp inputs out of the picture.
When the speakers were rolled and nothing changed - this took them out of the picture.
The only components left in the start-to-finish line-up that I can see are the amp and the output wiring.
The suggestion to roll the output wiring would be so to eliminate that possibility - if the problem moves, it's the amp. If nothing changes, then the wires would be suspect.
As mentioned in an earlier post - grounding and anything else associated with the amp (power feed and quality) are potential contributors. So be cautious before just deeming the amp proper as the problem. Offhand, I would think that a power / ground problem would show up as affecting all channels, and not just one as I understand is happening here.
A longer answer (get ready - feeling a bit windy today!) - the fortunate part is that there is at least one good channel with which to compare against, making this exercise a bit easier than if all channels were affected.
If the system were drawn from start (power/ground) to finish (speakers) with everything in between, we know the problem has to be in there somewhere. Given the description, I assume that this 'cleansweep' thing-a-ma-jig is between the head unit and the amp.
When the RCA inputs to the amp were rolled and nothing changed, this essentially took everything upstream of the amp inputs out of the picture.
When the speakers were rolled and nothing changed - this took them out of the picture.
The only components left in the start-to-finish line-up that I can see are the amp and the output wiring.
The suggestion to roll the output wiring would be so to eliminate that possibility - if the problem moves, it's the amp. If nothing changes, then the wires would be suspect.
As mentioned in an earlier post - grounding and anything else associated with the amp (power feed and quality) are potential contributors. So be cautious before just deeming the amp proper as the problem. Offhand, I would think that a power / ground problem would show up as affecting all channels, and not just one as I understand is happening here.
http://mobile.jlaudio.com/products_c...php?page_id=79
Last edited by tg150; 08-28-2007 at 08:28 PM.
08-28-2007, 09:19 PM
#10
Senior Member
hmm, interesting unit. Looks like a high-tech version of what I know as a pre-amp. Looks to be connected as assumed - between the head unit(s) and the main amp(s).
I still stand by my suggestion that if you rolled the RCA inputs to the amp and the location didn't change, the problem is downstream, and that given what you've previously said - the problem should be in the amp itself or the amp's output wiring.
Geez, I remember when a Fosgate (before the days of the Rockford buy-out) Punch 40 was all it took to have one of the bitchin'est systems in town. Things have certainly progressed - and I'm feeling so OLD! :-)~
I still stand by my suggestion that if you rolled the RCA inputs to the amp and the location didn't change, the problem is downstream, and that given what you've previously said - the problem should be in the amp itself or the amp's output wiring.
Geez, I remember when a Fosgate (before the days of the Rockford buy-out) Punch 40 was all it took to have one of the bitchin'est systems in town. Things have certainly progressed - and I'm feeling so OLD! :-)~
