if my pdx 100 by 4 is running my component up front shouldnt there be two channels left to power my sub...the guy who did the install said that you could not bridge the 2 channels to get the 200 wats so right now im only running 100 watts to my sub which is a jl w1 ten inch...sound like it makes sense to u guys cuz if u look at the specs its says 100 by 4 channels or 200 by 2 channels

 

This is probably better addressed here:

In the Audio, Bluetooth, Electronics & Navigation section.
https://acurazine.com/forums/forumdisplay.php?f=94

 

I have PDX amps. You can bridge your 4.100 with no problem. Just use the positive from one speaker output and the negative from the other.

Your installer may have been intimidated by the unique speaker out connectors - lol

 

he told me he couldnt bridge them because they were already hooked up to my components up front so i just got an extra channel left cuz the other one goes to the sub