So I'm installing my sub amp on top of the bose amp beneath the trunk floor, and there is very little room for heat dissipation, so I'm installing a couple of fans to increase the air circulation in under that area, and vent it out through the side vent by the bumper. I'm hooking it up to a relay that will be switched on using the blue/silver turn on lead from the bose harness.
My questions are:
1. Can I hook my remote turn on for my amp as well as the signal for the relay to the bose remote turn on wire while retaining the bose amp and supply enough current to turn on all three?
2. If not, should I run my remote turn on to the sub amp from the relay, like can I send it too much current and fry my amp through that remote turn on line?
3. In regards to grounding the relay and and fans, should I use the same ground point as the sub amp or is it ok to use a seperate ground point without introducing a ground loop?

 

I added some fans back in the day using the standard Bosche relay.

This was back in '99 so the details are a little foggy but I remember using the remote wire to trigger the relay.

Also there was a TON of noise being created ny the fans, I don't remember what I did to stop it, make sure you are using a "brushless" fan whatever that means and if I remember correctly run its own power and ground wires and keep them VERY far away from the RCA's.

 

You run into a ground loop problem when you have different potentials in your grounds - the ground from the RCAs is not equal to the local ground of the amp (I think, someone yell at me if I'm wrong, it's been a while).

Since you're only getting ground from one source with your fans, you can't possibly end up with a ground loop problem, but you can definitely have an electrical noise prob. I think it's more important to keep your power sources independent of each other in that case - don't piggyback the fans on the amp power. You'll also want to keep that power wire away from any speaker and RCA lines.

Brian