In the world of home theaters, the trend is bigger TVs and smaller speakers. SoundMatters confirms this with their miniscule (for a subwoofer) SUBstage 100. Its footprint of 8"x4" is accomplished via their proprietary magic and “moving walls” within the speaker enclosure. The woofer has a 100-watt Class D amp and can be daisy-chained with additional subs to really get the room rocking. Shipping now, only $299.