Everybody loves small speakers, and why not? Smaller is — often — easier to afford, easier to schlep home, easier to place, and easier to live with. Smaller also has certain acoustical advantages in achieving smooth response and in yielding the broad, even spread of sound that favors good imaging and an open, believable tone color.
But how small is too small? Some say there’s no limit, and at least one manufacturer (Bose) has had success with subwoofer/satellite designs whose sats are smaller than a pepper mill, let alone a breadbox. But as the front satellites of a speaker system become smaller, their ability to reproduce bass low enough to bridge effectively with the practical upper limits of a single subwoofer, at around 150 Hz (and ideally lower), becomes questionable.
Klipsch thinks it has found the sweet spot with its HD Theater 600 system