Ur sig says D2 so I would assume thats what u have so u can wire at 1ohm or 4ohm. So u may be wired at 4ohm now and wanting to go 1ohm. Thats what I assume u mean.
Technically the answer is no. The gain is used to match the INPUT level which in your case is not changing, your simply changing the amount of power output based on the impedance the amplifier sees.
My buddy wired it for me. but it has a negative and positive wired across the sub on both sides. the a negative on one side running to the amp and a positive running from the other side to the amp. so 2 ohms? ill post pics in a couple mins. and I'm pretty sure its a d2.
so im wired at 1 right now? or at 4? cuz I'm hoping I'm at 4. cuz if 1k watts sounds like this I'm screwed. but if its only 300 to 400w then that would be sweet lol