hello...i recently bought unity the rocks which i think that they are excellent..i also threated my room.i'd like to add a sub in my set up.i need a sub with remote bypass option.i don't want to work all the time with the sub engaged.i also need tight ,focused sound...there is only a small problem..i don't want to spend a lot money!! i found a used genelec 7060a for a great price.about 650$.it has fixed crossover at 85 hz,both hipass and lowpass filters.iam also considering a cheaper sub like maudio bx10 or samson r10.the rocks have a very good bass response (70hz-35khz +- 0.5 db). could you please suggest me a nice sub (not more than 650$) ??do you think that genelec is good sub? the advantage of the maudio and samson is that they have variable crossover.do you think that is better to use a ''cheaper'' sub but set the crossover frequency where i like (maybe at 60-65 hz) or genelec 7060a with the fixed 85hz freq??