Originally Posted by Codes20
I'd recommend setting the sub anywhere between 70Hz and 90Hz. It really depends on the room and your preference.
THX certification is 80Hz, I believe. Not that it should matter much though.
That's true. And the more work the sub does the less work your main amps have to do if you set it higher.
Much higher than 80 to 90Hz can detract from the fine sound of your KEFs.
This is a limitation of some cheaper receivers or using the bass management in some DVD players (including some good ones) which cut off at 100Hz.
This has to do with the quality of your sub too. For quality speaks like the Kefs, you would want a quality sub that sounds musical.
Experiment with different xover settings, you may be quite surprised at the difference it can make.