if anyone would like to shed some light on this, all is appreciated. okay i am running a 4 channel amp and a mono amp. from the battery i am running 1/0 power wire into a distribution block which is two outputs of 4 gauge. each 4 gauge going into each amp respectively.

i will be running two separate grounds for each amp.
question, should i run 4 gauge grounds? i have been told in the past that its best to match the gauge wire of the power & ground. But seeing that what is actually making contact with the amps will be 4 gauge power wire, should i match that with 4 gauge ground? or use 1/0 as grounds?

another idea that was floating in my mind was getting a ground distribution block and run the two 4 gauge grounds from the amp into the block and the output would be one 1/0 ground. not sure if its a good idea to ground two amps with 1 ground though.

some input would be greatly appreciated thanks
-Jesse

 

Me personally would run separate grounds this way your not taking any chances .
As for your wire gauge question , depending on the distance from your amp to grounding point here's a chart for both power and ground you should base your wire gauge on . Hope it helps

 

you should size the power and common the same (not really a ground since it is a current carrying conductor)

In this case you power is a 4ga so run a 4ga common for each amp.

Why two commons? Are there two terminals? Do they share the current load?

 

I did same as you did and ran 4 awg grounds from each amp to a common ground point. Most have done that too
Make sure you have a good ground point