Odd comparison, I know. I am guessing the PB2-Plus will play louder? What about musicality? Obviously the TV-12 driver used in the Ultra is off higher quality. Both are in similar price points, I’m just having a hard time distinguishing the trade-offs. Maybe I will list my goals and you guys will help me discern which sub is better for me… - Musicality is “significantly” important as HT - Shape and size is not of great importance, although I do prefer Box Woofers - Quality is definitely of more importance to me then quantity Other questions… When is SVS going to release a PB1-Ultra? Can you get the PB2-Plus in a wood veneer? Thanks!