That would mean the crunch amp is probably overrated a little. The ZX750.1 may do up to 1000w at 2 ohm, that crunch amp is rated 1250w. They are probably just like hifonics since they are made my the same company. Also I seriously doubt that thing does 2500w at 1 ohm. Can usually tell when they say some BS like "Dynamic Music Watts" in the specs.........
I went to my bros today and the dude that bought the GP2500D was there. This time he had a Memphis MOJO 12" dual 2ohm so now he can run the amp at 1ohm and it is bangin. I don't know how much he payed for the GP2500D cause he went to a car audio shop. But I would pay $229 for the amp at Onlinecarstereo I want to see what the GP3000D-Pro is made of.