We demoed these speakers at the store last week and weren't impressed at all... with specs showing only ...61hz/56hz the low end bass resonse definitly didnt impress us....but after all they are only 8"/10" speakers....nice top end units, ...but a sub is definity needed....I prefer a powered 15".......

http://www.qscaudio.com/products/speakers/K_Series/series_specifications.php

[This message has been edited by Dnj (edited 10-10-2010).]