Jeff, stay far FAR away from these. I also had an opportunity to buy one of these from a friend, used, and amazingly cheap. I posted on the Del Sol board, and I got about 10 quick responses letting me know how terrible and rust-prone Monza/Pacesetter is. It's cheap for a reason - terrible fitment, construction quality, etc.
I have since seen one (with it's unmistable black and yellow tip) on a 180sx, and it sounded terrible. Like the stereotypical "can of angry bees." No bass whatsoever, not loud in general... it's not quality.
It also, if this matters, gets absolutely no respect from anyone on this board. It's in the same category as BOMZ headers, neon license plate screws, and the wiper-jet LEDs - cheap, ebay-licious trash which appeals to budget racers, but makes them pay double for quality in the end.