dont understand impedance for this sub

[chrisw91 10+ year member]

alright, i found this amp http://www.millionbuy.com/pakbamf20001d.html

but is there a way to have the amp put out only 400 watts even though it puts out 600 at 4 ohms?

 

[ultimate157 5,000+ posts]

Yes, don't turn up the gain as far. Set it correctly with a DMM

 

[bdawson72 5,000+ posts]

I'd just check out the rockford fosgate wiring wizard.