AFAIK story went that Rode bought Event in 2006 and Rode president wanted to make a ULTIMATE MONITOR SPEAKER, so they really went on. They released them in 2008 or 2009 and when they got really good press and reviews, components went short because of earthquake in Japan in 2011 (they manufactured some parts there) and production stop for some time as they made a revision with different tweeter. Opal would came a modern classic without a problem, but after a few revisions and halted production people were confused.
That's basically what happened. Peter Freedman always wanted to make a no-holds barred studio monitor, so he bought Event for $1 and the assumption of all their debt (which was substantial). He then hired Marcelo Vercelli to build new speakers - and Marcelo hired me to do the woofers, tweeters, etc.
We spent 2 years on the Opal, designing from scratch. We did an ultra-low THD/high-stroke woofer (19mm one way linear per Klippel) with 17 microHenries of inductance - yes, 0.017 mH @ 1 kHz, flat over stroke (as was the BL - it was +/-3% BL over the center 30mm of stroke). We did a custom copper/beryllium blended tweeter dome in that waveguide (we prototyped dozens of guides in real studios before settling on that unit). A full 750W of class A/B amplifier for the woofer, 150W class A/B (15W bias point - so almost always class A) for the tweeter. Analog crossover, EQ, etc. Even a linear power supply. Custom tooled enclosure. More.
It really was a stunning performer, earning Sound On Sound's Monitor Of The Decade award, and lots of other great reviews. It was supply chain - and cost - that really killed it. It was NOT cheap to make, especially with the tooling costs factored in (6 figures for the cabinet shell alone). So sales were slow, and then when supply chain fell apart in 2010/2011 - it died.
It was fun to be part of a team, though, that was tasked to make the best of a breed (2 way studio monitor), no holds barred - and have a backer willing to spend as needed.