I don't know about making a crappy PA sound like new (wouldn't a new crappy PA still be crappy? ;)) but it's a handy little unit, especially for a small club PA or something. It's got some great features like the crossover, noise gen. and RTA. All in all worth the money unless you're going for a real big setup, but even then it'll still do you good.

I've had mine a few years now and I love it!.....it's almost worth it's weight in gold!........you really cant do better (cost wise) than the driverack for live address....