Few common issues i could use some help with!

[mastermayhm]

ticking noises are annoying

[dizzlestoy]

Ticking noise could be depth sounder. It was on my boat.

[mastermayhm]

im pretty sure the sound is from the alternator, but I dont know what I would need to do to get that noise to stop, I tried installed a noise filter on the back of the head unit but that didnt help

[TurboFan]

Does the rate of the tick rise and fall with speed?

[Wakebrad]

Does the voltage drop randomly or on cue? Your alternator may not have enough amperage to push to 2 batteries. May need to get a more powerful alternator or get a battery isolator.

Make sure the speaker wires don't run close to other wires. I know on my boat I ran the tower lights and the speakers up the same side, this caused interference. I ran the lights up one side and speakers up the other and it fixed it.