My current amp is 14x so 8x won't be too bad ;) 4ch B22, in my opinion, is a waste. Yes balanced has advantages but it also has disadvantages and a single ended B22 is already powerful. The fact of the matter is 8x gain guarantees being able to hit the power rating of single board with a 2V source. The new GS-X on the other hand, even with the added power, needs to be balanced to reach B22 single ended power ratings.
Single Ended B22 = 43Vpp
Balanced GS-X = 48Vpp
Edited by Solude - 11/23/12 at 7:17am