Axis Wakeboard Boat Forum

Recently put some Rev10s on my tower. First with Wetsounds HT-4 amp and now with ARC KS600.2. I've got some pretty nasty alternator whine or some sort of buzzing in the speakers. It can clearly be heard even over the music when at a low volume. It also increases in volume/intensity as I use more power (for example, is screaming when I am filling/draining all my ballast). It wasn't there before the tower install (I think), but then again before that I was just running the cabins off the stock deck. Two different shops have tried to correct the issues...amp swap, changing out the RCAs, checked all grounds etc.

Has anyone else had an issue and can think of something they might have missed on our Axis? It is definitely a signal issue somehow as it goes away if I unplug the RCAs going to the amps.

I would try two things...

Make sure the aml grounds aren't running next to power wires.

Shorten or re-ground your head unit. Sometimes when you run red/yellow/black power and grounds together too far you will get that.

Are you still running your cabin speakers with your head unit? Did you put in a EQ?

is your head unit grounded at the same spot amps are? 1 or two batteries?

Install ground loop isolators.

I am having the same issue. Pretty much individually tested the whole system with known good parts. Mine starts before the engine turns on. I feel the signal is coming from the fuel pump somehow. When turning on the key it whines for a second and stops. It then comes on full time with the engine.