Do you adjust your subwoofer

Beware of using the published specs to determine how low your main speakers actually go. Try to play a test track with defined frequency levels from Quboz or from wherever and hear how low your speakers will actually perform.

Then, set your sub crossover to enter perhaps a little lower than your main’s will actually play.

ozzy

If I'm on a Tool jag and want to send ripples through my sternum, I bump my sub to about 1 o'clock or so.  Typically it's at about 11 o'clock.  All other adjustments stay the same.  

I have been using a Hsu for over 20 years. Really integrates with the speakers well. I switch between Tekton Lore Be's and vintage Linn Nexus speakers. 

I never felt i needed anything else. I use the high level speaker outputs on the sub. Great reliability. Not a single issue