I could immediately hear the difference when I switched the T1500-1BD with the Crossfire VR 1000D. I have been working with car audio since I was 19 years old when the punch 45 used to run an entire system including 12's and bump hard. The days of Linear Power, Hifonics, PPI and so on. Now I am 38 and after I put the VR 1000D in the truck with the gain up 1/2 -3/4 of the way it didn't even get close to my T1500-1BD. Not a knock on Crossfire but an observation. All the guys who posted earlier in the forum were 100% right to tell me to stick with Fosgate. That's what I'm doing. Sticking with Fosgate. This lesson costs me a few hours of inconvience and a valuable lesson.
This is a really good forum.