the best test you can run in a set of speakers is as follows :   POWER on your woofers ?  Pink Floyd "another brick in the wall" http://www.youtube.com/watch?v=YR5ApYxkU-U&feature=fvwrel total combined Harmonic Fidelity on all your drivers ?   try these: Antonio Vivaldy "The Four...

correction, I owe a pair of Bose 401 not 901 and they can't hold as much power than your infinity RS-II.  If you don't have a receiver or amplifier that outputs at least 125 watts RMS, then your infinity's RS-II are just a waste, you can get the same quality of sound with Bose 601 and even 401...

to be honest ? I compared these speakers back in 1985 at a military retail store against  Polk audio, all Bose systems available, dbx, Cerwin Vega and even klipsch.  and the only comparable sound quality to them was the Bose 601 (not the 901).  the Bose 601 sound as beatutifull to the RS-II...