A user from the L300 thread mentioned that how the drivers are positioned relative to your ears can cause a deep trough to appear in the 8kHz range. You might want to do a sine sweep to investigate. I actually prefer the sound of the L300 demo to the L700 demo by Zeos. If the demos approximate their sounds adequately, the L300 sounds more intimate with more present mids, whereas the L700 would be preferable to those for whom soundstage is critical. You should consider L300. At least two other people have stated they prefer the L300 to the L700. Several have said they prefer STAX "cheapies" like 207 or L300 through the srm-252s to even their flagships. The big head-fiers who've invested huge efforts into designing, building, and selling powerful amps to drive the STAX flagships will of course have their obvious bias, too. I've driven my HD600 with humbly-priced amps, and the Schiit Mjolnir, and honestly, the improvement I heard wasn't worth the hole in the wallet...even though the Mjolnir was supposed to be competitive with amps much more expensive than itself. http://www.soundbsessive.com/stax-lambda-nova-signature/ https://www.head-fi.org/threads/sta...nature-impressions-from-my-first-hour.515184/ These impressions make the lambda nova sig sound much lesser than modern STAX headphones, but we all know our ears have their own minds. That's just yet another reason why this hobby is such an adventure.