I just received my upgrade woofers for my SVS PB12-plus/2 and installed them yesterday. I tested the sub with the new woofers on the Gladiator and Star Wars III DVD's. There is a definite improvement in sound quality. Bass is more tight, more body to the bass, more authority. I am quite pleased. Retrofit was relatively easy.
Now, what to do with the old 12.2 Subs. I guess I will put them for sale on ebay. Anybody interested?
Phil