Just got a good deal on used Revel F206's and decided to get them for my bedroom. I've just had 1 day with them so my initial impressions may eventually change. Decided to compare them to my Sierra 2-EX's. Please note the test wasn't blind. I did my best to level match by ear, but obviously didn't have an instrumentation to make that accurate. So yeah, it definitely lacks scientific rigor, but maybe it could still be useful.
To start off with, both speakers sounded wonderful and both aim for a neutral response. Any negatives described are really just nit-picking and I could easily live with either speaker (and I plan on that since I own both). I was using a Pioneer SC receiver that's 4 ohm stable run in direct mode. Source was Google Play Music Premium streaming from a Chromecast.
The first thing that surprised me is that it seemed like Sierra 2-EX actually had punchier bass - I really couldn't believe it. This was obvious on the track "Fall Underneath" by Snakadactal (the Kilter remix). This could totally be a room issue, I admit, but still surprising nonetheless. Bass extension seemed similar between the 2 as well.
The F206's dedicated midrange driver added a little bit more layering on some tracks than the 2-way Sierra 2-EX. It wasn't a big difference, but you could tell on tracks like Roberto Menescal's "Voce E Eu." There's a lot going on in this short piece and the F206's midrange is a little bit more distinct.
The Sierra 2-EX has wider horizontal dispersion/soundstage but the F206 has a taller one. The soundstage width difference was evident on most songs. For vertical sound stage, Paquito D'Rivera's version of the "I Love Lucy" theme song has the saxophone playing up higher on the F206 than the Sierra 2-EX. Soundstage depth was similar between the 2 and both very good.
I think the biggest difference in sound was the treble. The F206's treble can be a little lean/brittle at times, even bordering on harsh, especially when turned up. The RAAL tweeter in the S2-EX's never got harsh and just had this open, airy quality that the Revels never quite obtained. String instruments, especially, bring out these differences. The beginning violin intro in Jill Barber's "A Kiss to Build a Dream On" sounds more natural on the Sierra 2-EX's.
All in all, they're both great speakers and these are just initial impressions. I'll keep on listening and post back if there's anything that needs to be updated.
UPDATE: added updated impressions here: https://www.avsforum.com/forum/89-sp...l#post59221084