Man, i compared closed vs normal on crinacle.com . Would prefer closed version.
Please find someone who can measure lcd-2 stock and with your closed kit. Then post results here. If you manage to fix mids and higher frequencies you will become a saint.
If in his measurements Amir matched harman curve to red line measurement he would get closer to what Oratory1990 got:
Overall, it is the headband that ruins them, not the sound quality.
Crinacle did excellent research on effects of pad wear:
Hd650 does lose quite a bit of hf with pad wear. While hd600 becomes more balanced.
Man, relax. All this "bad" performance is uber good once you check amplifier performance of amps inside jbl lsr305 amd lsr308, local darlings.
If you are paranoid get a denon x3700, put it in preamp mode and a bunch of power amps. This should allow for pretty much state of the art performance...
It would be really great to see JBL4367. They seem to run circles around Revel in terms of distortion (taken from here https://hometheaterhifi.com/reviews/speaker/floor-standing/jbl-4367-studio-monitor-loudspeaker-review/ ) :