Saw the recommendation for the Sumo Polaris... it is the most odd duck of the Sumo line and will sound different than Pass. However Jim did not design this amp. Rich May did it. Jim would Never use mosfet outputs. The original Andromeda was a JB piece, but it could be edgy from the mids & up. The Andromeda II was a similar flavor to the Polaris, but everything is better on the Andromeda II than the Polaris. It is odd that its a cool sounding amp, yet never gets sterile or harsh. The Andromeda III is an update by Jason Stoddard. The Polaris is a good recommendation non the less to hear a different sound than Pass.