I have. Martin Logan CLX with Descent i . I like to use a second preamp output to drive the subwoofer. This has the advantage of a cleaner signal for both woofer and main speakers, but the disadvantage of requiring a level adjustment if the main amplifier is changed.
A lot of folks talk about fast/slow woofers with stats. They're talking out their butts and are reflecting their frustrations due to basic incompetence at setup of a sub-woofer. Trying to adjust a sub-woofer based on listening to recordings will be an exercise in frustration.
These frustrations are similar to those expressed for multi-channel playback. In that case, lots of folks just can't handle proper phase and level setting of the multiple speakers. Just my arrogant opinion. ;)
The trick, in the absence of good automation, is to use a calibrated mic with a decent RTA and suitable broad-band noise. I use True RTA on my PC with a calibrated mic. You must be sure to load the mic calibration data which allows the RTA software to compensate for the mic's errors in response. This allows for rapid, non-guessing, setup of level and phase for good blending with the main speakers. Once set, you can feel free to make slight level adjustments to taste.
A lot of folks talk about fast/slow woofers with stats. They're talking out their butts and are reflecting their frustrations due to basic incompetence at setup of a sub-woofer. Trying to adjust a sub-woofer based on listening to recordings will be an exercise in frustration.
These frustrations are similar to those expressed for multi-channel playback. In that case, lots of folks just can't handle proper phase and level setting of the multiple speakers. Just my arrogant opinion. ;)
The trick, in the absence of good automation, is to use a calibrated mic with a decent RTA and suitable broad-band noise. I use True RTA on my PC with a calibrated mic. You must be sure to load the mic calibration data which allows the RTA software to compensate for the mic's errors in response. This allows for rapid, non-guessing, setup of level and phase for good blending with the main speakers. Once set, you can feel free to make slight level adjustments to taste.