sounds volume changes on it's own - rear speakers only

[ejaffe]

Here's an interesting issue that just came up. I upgraded my audio over a year ago and recently I have been hearing the volume go up and down as I am driving. I identified the issue and it's at the rear speakers only. The rear speakers have been changed out to 6 ½" Kickers. I have an Audio Control Amp. Any idea what could be creating this issue? I already checked for loose wires. Interestingly enough, it sounds like the speakers are getting louder than normal, not softer than normal and I actually prefer them at the louder volume. I also turned off the auto volume/speed control in case that was the issue and it's not. thanks for the ideas

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[Area51BS]

Load resistors installed between output of OEM radio and amp? OEM radio design could be rearing its design and not seeing proper load. Usually surfaces much sooner.
Is amp multi channel running fronts too? Start swapping things. Swap front rear speaker outputs. If problem stays in same speakers it’s amp related. If problem moves to front speakers it’s on the input side as the issue.

 

[ejaffe]

I't a multichannel amp... LC1300. no resistors installed. Multichannel amp runs front, rear and sub

 

[Alassise]

I also have an aftermarket system, and had a different issue a few days ago. Only my front passenger speakers had sound. I did the soft reset on the radio and the system started playing normal again. Occasionally, the system will act buggy, but the soft reset takes care of it. I don't think is the aftermarket system, it might be the actual vehicle system. Yesterday, my CarPlay was acting weird (loosing connection/will only connect with usb cable, etc). All corrected with resets. It sucks, but I learned to live with it (for now).

 

[ejaffe]

Soft reset may be a good suggestion and easy to try.

 

[Darren D]

Do you have the SCV (speed controlled volume) enabled? It will adjust volume based on speed (wind noise) in the vehicle.

 

[ejaffe]

I turned it off but the issue happens either way

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