Here's a different opinion about the midrange in a mix review:
Event Opal Studio Monitors Review in Mix magazine product review of the Event Opal Studio Monitors
"Traditionally the Achilles’ heel in most two-way designs, Opals’ excellent midrange definition and detail made a huge difference when working with vocals, letting me clearly hear nuances in mic/preamp selections when tracking or making subtle signal processing decisions in the mix. And piano/flute/violin session playbacks showcased the invisibility of the crossover point, which was totally seamless. The balance between lows, mids and upper-end was spot-on—at any level—so mixing on Opals was an absolute pleasure. Thanks to the low-distortion performance, there was almost no hearing fatigue, even over long listening periods. You can mix on these for days on end."
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I have Opals here and I'm loving them. Not having any problem with the midrange. It's hard for me to believe that anyone would complain about the midrange on these. In fact, a producer/engineer friend was here yesterday and he couldn't get over the midrange detail. Same for me. My ugly mixes definitely sound ugly on the opals.
To each, his own. I suppose someone who is used to mixing on NS10s or maybe even Mackies wouldn't like the Opals. I don't particularly like forward mid-range... to me, it's not as musical. But, I'm producing a lot more than I'm mixing. I suppose if you're mixing a lot, forward midrange might be preferable. I wouldn't go by one guys opinion on the Opals though, and I def. wouldn't let it keep you from doing your own audition.
My only beef with the Opals is the self noise. I had Barefoot MM27s here before the Opals and of course they're dead quiet. The Opals aren't. I'm getting a white noise kind of thing and it's annoying when I'm used to zero noise.