Trust me, the 4345 does not need a lot of volume/level to let you feel the bass. That is the particular advantage of the 18-inch woofer. The previous owner of my pair called them "The Velvet Hammer" and they don't even need more power to do what they do so well, which is to fill the room (any room) with the full audio spectrum. My daughter's boyfriend is a classically trained bass player who has recorded in the Jazz genre. He says listening to the 4345 is the first time he's ever heard music that really represented the live performance, especially in those quiet passages.

Whatever you choose, don't overlook what an equalizer can do for the part of the spectrum you can't hear at low volume. It's not the speakers' fault, it's your ears and your brain!