Other than a company PDF, I can't find crap all for reviews on this sub amp.
I am currently debating a sub upgrade.
I have a high end passive sub that needs an amp and the Powerpack 500w is pretty much perfect since it *says* (company PDF) it is 2 ohm stable and I know that this passive sub can and will dig that deep on occasion.
I guess my biggest thing is when I listen to the 1812 Overture, I want to hear and FEEL the cannons fire. Not in that tactile transducer sort of way but more in that just got punched in the chest by Mike Tyson sort of way.