Subwoofer crossovers

Edorr,
Pink Floyd and some other music is why I upgraded from the Verity Ovation to the Sarastro's. I bottomed out the bass drivers of the Ovations with music from The Wall album. I prefer the sound of Verity speakers so I stayed with the line and the fit and finish of them is awesome. If I did not push 90 - 100 db with Floyd and some other music I would not have run into the issue. BTW I could not make them bottom out with the CD version of The Wall. Vinyl is my preference SW when I listen to 2 channel music.
The only thing I miss most after the upgrade was not being able to rotate the bass cabinet but the size of the Sarastro's bass driver more than makes up for the inability to rotate the bass driver forward.

I am looking into the NHTx2. It looks like it does more than really need.
I will set the front panel EQ to match what I have the JL's front panel setup for, so the 2 channel system will have no change. Then when the LFE input gets info it will over ride the 2 channel settings to the LFE crossover setting. I will set the LFE crossover to 110 Hz and allow the Meridian to set the actual crossover point. As long as the crossover point is at or lower than 110Hz there should be no problem.

I did an in house shootout between the Avalons Eidolon Visions and my Verity Parsifals and prefered the former. Highs of Verity were a bit smoother, but I prefed mid and in particular high bass in the Avalons. I blew up the Avalon midrange playing Floyd at 95db (105 peak) at 12ft distance.

To my knowledge the NHT does not apply any crossover filtering to the LFE channel, and there is no 110Hz setting you can apply. It (correctly) assumes LFE is always crossed over in the SSP or source player. It passes on signal and sums it to the 2 channel information.

If you set the NHT to the same setting as the JLs you are applying two low pass filters (not sure slopes would match). You would get less signal degradation if you bypassed the filter in the JL (flip the switch) and just applied the crossover of the NHT, not sure the difference would be audible, but philosophically this would be preferable. How are you planning to score a used NHT if I may ask?

Hevac - other thought. If you have set cross-over on your JL's for stereo mode (at say 35Hz), the JL's will cut of your LFE input at that frequency as well, and you would lose most of your LFE information. The only way around this is to use the NHT crossover as intended and as I described in my previous post, and switch off the JL's Xover.