So I have sub Ground Zero gzrw 38 which is 1500rms dual voice coil 2x2, and I have amp which produces 1500rms at 1ohm. After some time one voice coil seperated and I had it reconed completely. But now sub has 2.5ohm on both voice coils so when paralled wired it shows around 1.3,1.4 ohm. Is there any solution to this? Can I set gain higer to make for difference?