Hi guys,

I'm experiencing a lot of noise on the auxiliary input - I use this for my Bluetooth car kit, but I can also hear a pulsing that alters as the car speed increases (note, vehicle speed, not engine speed) and since I've fitted the tuner module, I can very faintly hear the radio when I select aux-input.

On the other inputs it's fine (apart from some alternator whine, but that's due to a non-optimal amp grounding which I'm going to fix ASAP). I saw an entry in the FAQ that referred to grounding the aux in RCA sleeves, but I'm unsure why this would be necessary?

Is this likely to be the cause? If so, what's the best way to go about grounding them?