I added a pair of Vandersteen 2WQ subs to mine and was ASTONISHED at the difference it made. Not because of the deep bass it added, but because the 3A Sigs themselves sounded SO MUCH BETTER since they (and my Quicksilver V4 tube monoblocks) no longer had to worry about making deep bass. Borrow one or two 2WQ from your dealer and give it a try. You'll be amazed and he'll make a sale.
PS Even my tone deaf wife heard a big improvement over the already excellent 3A Signatures.
PS Even my tone deaf wife heard a big improvement over the already excellent 3A Signatures.