Unless I'm misremembering Erin's measurements, the Q 11 Meta's port tuning is 35 hz or so. Their response is dropping like a stone below 30 hz. Feeding them the lfe channel seems pointless and potentially risky.
It could be for movies, but in music there is little content below 30 Hz. I run my rig with all speakers except the ceiling speakers full range. I have never had a problem. I highly doubt his left and right speakers will be damaged though. Minimizing the crossover settings improves the transient response. When I use crossover to all the speakers, it is unquestionably a downgrade. The crossover from the mid lines to the bass lines is acoustic, and the LFE added. After all before this bass management craze we always ran our speakers full range, and I never had a problem, which is most of my life. I run my family room speakers full range and push them hard at times. Mind you, KEF B 139s are really robust and capable speakers. Falcon acoustics are producing them again, and reporting brisk sales. That driver goes back to 1969. I don't think a modern driver of that size, and many that are larger, can compete with them.
