look at the totem mani 2's. a speaker doesn't have to be a certain size to produce the low octaves. my mani's go lower than 30hz with a 6.5" woofer, but there are 2 of them in an isobarik design. the revel salon and studio speakers are in the 20-25hz range with 8" woofers. i have heard many speakers with smaller woofers that produce the lower octaves better than speakers with bigger cones. the design of the speaker along with how many woofers are involved make more of a difference than the size of the woofer.
