If you're talking for music, I'd be a bit more cautious than many of the above replies.
Traditional subs were designed primarily for the low frequency effects of movies, not music. Given that such LF noises are not directional, you just had one sub.
In sub/sat systems for music, the sub has to do a LOT more work, and is responsible for much of the mid bass (and even low midrange) frequencies, depending on your choice of satellites (and therefore crossover freq). These frequencies ARE directional, and you may find your stereo imaging suffers.
If you use very small sats, I'd seriously consider using two smaller subs to preserve the stereo information of the lower frequencies, or otherwise look at small fullrange wall-mountable speakers (eg B&W 686) + single sub.
Traditional subs were designed primarily for the low frequency effects of movies, not music. Given that such LF noises are not directional, you just had one sub.
In sub/sat systems for music, the sub has to do a LOT more work, and is responsible for much of the mid bass (and even low midrange) frequencies, depending on your choice of satellites (and therefore crossover freq). These frequencies ARE directional, and you may find your stereo imaging suffers.
If you use very small sats, I'd seriously consider using two smaller subs to preserve the stereo information of the lower frequencies, or otherwise look at small fullrange wall-mountable speakers (eg B&W 686) + single sub.