I have an aftermarket head unit and as i accelerate the volume gets louder and as i slow back down the volume goes down. its super annoying. any ideas as to what might be causing it?? btw its in an 01 civic sedan.

 

If I had to guess, I'd say your HU has an auto-volume adjustment. Increased speeds create increased road noise, which the HU is trying to compensate for by increasing the volume.

 

problem fixed. thanks bud