I work with synths a lot, and listen to music with suboctave content. My left and right monitors have a hard cutoff at 50 Hz; there is a characteristic/clichéd descending tone used in EDM (electronic dance music) that just disappears below that, so I must have a sub to listen and mix with. My phones go down to 5 Hz, but it just isn't the same. I got a 10" JBL powered unit pushing 100-150W of power. I can't even begin to crank it up as the windows in my tiny music room start rattling early on. That's okay--keeps my lease intact!

"My primary musical instrument is the personal computer."