i have a massive 3000.1 and a audiopipe 3000.1 on my bench, and the boards are very simular to each other...
IMHO .the audiopipe is just a smaller version of the massive...
the massive has its driver card flat on the board with a chrome cover , the pipe has its card standing straight up...both use the same outputs, basicly they share the same parts. the audiopipe uses wire jumpers instead of the massive using metal bar jumpers on the board
so to me , if your buying a audiopipe amp, you are basicly buying a massive 3000.1 both are underrated , and they both do about the same power, except the audiopipe is stable at lower ohms than the massive...oh..best part of all is the audiopipe is CHEAPER!...