I am about to

[bass-aholic 10+ year member]

order 2 18" Btl's and 2 crunch gp3000d's. Electrical is a 250amp alt and 3 power master batts in the back. My question is the btl's can come in dual 2 (1.4) or dual 1 (.7) should i get dual 2 run each crunch at .7 plus imp rise or dual 1 and run them at 1.4, i don't know how stable the gp's are below 1 ohm.

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[Rashaddd 5,000+ posts]

If they are dual 2's that means their nominal AC impedence is 2 ohms, DCR varies and unless its way off you dont need to worry about it in most cases. If you were running the amp at lower than it's rated nominally, then it can come much more into play

 

[bass-aholic 10+ year member]

Fi's subs are dual 1.4 or dual .7....