Help me understand 4 channel amps please

[NYR36 10+ year member]

Hey, sorry I'm a newb but I got a few things I need to understand.

First. Do you need two RCAs from the deck to the amp? One set for each set of channels A/B, C/D?

Second.Can a 4 channel amp run 2 different Ohmages(a word?). Like 2ohms bridged on the A/B and then run 4ohms on the C/D?? or does it have to be the same?

Third. Just for kicks, when you're installing sound deadining in the doors, where do you guys put it. I know everyone puts it on the metal that the speaker gets screwed into, but do you put it on the metal surface behind that sheet. Like what would be the actual door not the panel?

Thanks

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[jeeper07 5,000+ posts]

haha lots of questions, first off i would say to have 2 rcas from teh head unit to the amp like u said , yes a 4 channel can have the different channels runing different loads, sounddeadning you dont put it on the door panel its self you put it on the door once the door panel is taken off

 

[NYR36 10+ year member]

my amp says it can run at 2ohms bridged. So I would assume that it can do it. Just wanting to run mids off the A/B and Bridge C/D for a sub.