Instead of spending big dollars on the iSub,
another solution would be to check out the
Altec Lansing ACS33 Powercube system. My
wife and I each bought a set, mine for my G4
and hers for her iMac DV SE. Works great and
has 25 watts of power, sounds good playing
anything. The bass response is surprising.
I must admit though, the iSub looks really
amazing. Maybe once the software gets fixed.