i am looking at upgrading my Head unit to a Clarion CX501 for more music playing options (bluetooth, aux, and usb) and i have one question. the Clarion has 4 volt RCA output and i am wondering if i can use this with my rockford fosgate R500-1 and i have to run my subwoofers? would i just have to lower the gain on my amp due to the higher input? can i even use this amp with this stereo? any help would be appreciated! Thanks!