I play an SVT3-PRO through an SVT-410HE. Right now I'm looking to add another cab. I was thinking about a 2x10 since I really like the punch of tens. But I was also considering adding a 1x15 to get more bottom. I am looking at Ampeg cabs because, for one, I want them to match, but I like the tone of the Ampeg cab I already have. What do you think would be the better option? Two more tens or a 15? Would running the cabs in parallel instead of biamped give me much improvement in bass response? Also, is a passive crossover even a viable option to cut some of the lows to the 4x10? The other day I was looking at cab specs and it seems the low frequency response on Ampeg cabs is sub-par. Compared with SWR and Eden, Ampeg doesn't go nearly as low. The SPL's on the ampeg cabs were higher however. Any thoughts on this?