I feel like theres something wrong with my alternator and/or regulator.

Problem - While the engine is running, the speakers running off amplifier 1 cut out randomly, then sometimes come back shortly after, or sometimes they remain off for ages, point is, they're on and off randomly.

While the speakers running off Amplifier 2 (just a subwoofer) continue to run.

The problem doesn't occur when the engine isn't running.

At night when the speakers cut out my headlights get a lot brighter, then when the headlights dim, the speakers come back soon after.


Whereabouts should I be looking for a dodgy connection, any suggestions on what to play around with? All the connections on the actual amplifier are ok, the car came with the sound already wired up, so I'm not sure where I should be looking in the engine bay for a dodgy connection to alternator or regulator.