I enjoy my Icons very much, but I am skeptical of small subs. I have yet to hear a small sub produce bass notes that sounded true, i.e. without hollowness or coloration. It seems to me that the laws of physics dictate large drivers and powerful amplifiers for low frequencies to be reproduced faithfully.
Also, the legs imply a downward firing sub, correct? Doesn't gravity help with the downward excursion and hinder the upward excursion of the driver? Does this affect the sound? And wouldn't the driver, in time, suffer from gravity sag?
If you can pull it off, all power to you. I certainly enjoy all my Nuforce equipment: the Ikons, the Nuforce integrated, and the earspeakers with mic. Surprise me!