Setup info: Sub connected via SUB pre-out on HU and Front comp's amped vis the Front Pre-out on the HU (lots of wires going to/from the boot, lol) Rears directly wired (not amped). Both AMPS have independant live fused feeds from the battery, and are seperatly earthed also.
If I Disconnect the Sub its fine, but when connected and with the volume at any level all sound will randomly cut out (although CD will carry on spinning/playing). It will stay silent for anywhere between 5 seconds and 60, then it could be anywhere from 1 second to 60 before it goes silent again.
I'm guessing a fault in the SUB AMP is causing the HU to go into protect mode or somthing?
I should add this is a recent fault and was previously working fine, but happened before my recent head on 'tap' with a post, so is not a result of this low spead, slam panel bending, bumper breaking, bonnet denting impact.