I have some modded PSA,s they do have more bang, but I prefer them without the power increase mods! Just sounds better to me.
I havent used PSA-2,s for about 3 years now, and when I put em back, I didnt expect to hear what I did. They just rock on subs.
I, too, have had PSA-2,s from way back in the day! In fact, I have the first production SA-2, serial number 0001.