I have a PPI PC4100. Stickin to the old school equipment for a few reasons....mainly because it was incredibly good and today you can pick up the older stuff for a fraction of the price. Anyway, I like the single amp low watts. I'm wondering what any of you think about the old PPI Pro vs the old Solo Baric S12D Round not Square. My problem is that I want something as musical and tight as the PPI but as deep as the Solo. I only have 400watts for the sub to play with the other 200watts are going to the front stage so if you have other recommendations please keep it within the PPI PC4100 cause I'm not changing amps. The only other thing I was thinking about doing was breaking my single amp rule and installing 2 PPI PC275 and have a single SOLO 12 running off the PC4100 at 400watts and two PPI PRO 10's getting 300watts a peice each having there own PC275. This however seems ridiculous but I would do it to get the perfect combo if thats what it would take. Thanks