I have a D3 400.4 (~220 RMS) and I've got a D6 1500.1 (1500+ RMS) coming. I was wondering how I can ground the amplifiers. I don't want to use a distribution block. I found a good ground for the 400.4, so will I be able to just stack the ring terminal from the 1500.1 ground on top of that ground? Or should I ground the 1500.1 about an inch away from the current 400.4 ground?

 

Make sure that both amps are grounded as close as possiable. Make sure that the ground area is clean from paint and grease. Make sure your ground wire is the size or bigger then your power wire. I would run two separate power wire for you set. one 2 gauge wire for your d6 1500.1 and one 8 gauge for your d3 400.4 . This is you are really pulling r.m.s. that you are claiming. Or send 0 gauge down for both. Many say this is a over kill, But it better to do it right. And this is what it takes. Make sure you are using good quality wire. All wire is not equal. Cheaper wire most of the time is fake in claiming the actual gauge size.

 

so stacking them is not a good option? im powering them fine thats not the problem, i have kolossus 0 gauge to the back, kol 4 gauge to amp, kol 8 to 400.4, same ground wire.

 

yes you can stack them. Good choice on gauge wire I see you have been doing your homework. Make sure the fuse blocks are up to par. use anl.

 

either ring terminal on bottom or should i put the 1500.1 ground on the bottom?

 

its not really going to matter, throw the 1500 on the bottom. Make sure from time to time that it stays tight. It poss I would use a bolt.