I just got my Event opals in
I currently have the O300, love them but i'm a bit tired of adjusting my brain to their soundsignature. I do like a little more bass and tiny bit of treble than they deliver. I take that into account when mixing and my stuff translates great none-the-less, but always having to take care of that bothers me a bit.
These 2 are quite different speakers, the Opals have a really dry and punchy bass. I already thought the O300 was good in that area, but the Opals walk over them with ease. When you turn the Opals up, drums sound real in a way the O300 can only dream off. I think both go down equally far, but the Opal delivers the lowest end with more control and thus might appear to have a little more of it, but measuring showed it's about the same. The O300 has the lead in the mids with more transparency, but the Opal is absloutely workable with. Actually these sound so different i find it a bit hard to compare the mids only. The Opal represents music in such a different way, it would make sense to own both monitors
The Opal is more about the vibe and the overall (big) picture of the mix, however it's still clear and uncolored enough that you can easily work on the details too.
Another thing about the O300 that has bugged me... it's sensitive to placement, VERY sensitive. Placing a desk, a TFT between, a console, a TFT behind the speakers one or all of these things introduce colorations with the O300. I could never live with any of these and the O300 had to be free standing. The Opal are alot more friendly to placement. I tried everything i could hit on to ruin their sound but these take it extremly well.
Big shiny reflective desk, 2 TFTs, sitting too close in the triangle... Still workable on these