so here is my situation. I have a JVC head unit that only outputs 2.5 volts. i want to increase my voltage to my amps. the head unit has 6 channels of output. I have a couple of EQ's laying around that put out 9 volts of output. the problem is that the EQs only has a 2 channel input. am i losing anything other than fade and my subwoofer control? do i have any advantages or disadvantages using the EQ?