Would Luxman work well with JBL?

I have the 4367, as well as experience eith other horns.

The sensitivity rating usually is: 1000hz test tone measure at 1 meter on axial. It tells you absolutely nothing about the actual sound coming out from the speakers. whether its coming out ok, or harsh.

Compression drivers need as much CLEAN power as possible to sound the best. Thats why JBL rates 4367 and other of their monitors 300w amplification (its on the manual). The tone/sound is completely different when it sings at its 100%. Where the clean power coming from is up to you, and of course personal taste and music types dictate the amp choice, but if you are push ur JBL w 10w of whatever, at least borrow someone good 100-300w amp and see the difference.

Listening fatigue most commonly caused by distortion/compression, which occurred most frequently at (you guess it) the end of chain, your speakers, being the largest mechanical device that produce the actual sound. And the most common cause for distortion/compression in speakers is underpower (they do not get blown by tons of clean power)

This is the interview with the 4367 chief designer (as well as their 80k everest) Grep Timbers https://positive-feedback.com/interviews/greg-timbers-jbl/

He uses 4x Parasound JC1 (800w into 4ohm each) 1 for each woofer in his everest (tube for high). So lets say 4367 has 1 15" woofer, at least give it 400w high current power.