Event Opal professional active monitors

Thanks guys. Your replies are really helpful.

If I have understood well, main drawback for them could be their not fully refined presentation compared to top domestic speaker. Although I do not find them pretty, I do not really care about their raw looking.

One last question. Does their metal dome tweters have a big influence in the way they sound? Does it mean metallic, harsh high mids and treble? Or do you need to A/B them against a top notch soft dome to appreciate the difference. Does it intrude in the listening or do you need to really concentrate on it to realise their metal nature?

While I am looking for a very transparent system, a clinical sound is not what I am after.

Finally, I will use them at low volume. Can you comment on how they perform this way?

Once you hear Event Opal, you'll realize that it's a champion and flagship of all active studio monitors

The tweeter is very clear, but it still has a trace of ringing. Not offensive or too hot, but compared to my RAAL ribbon tweeters or the Eton dome in my Daedalus they are not as totally natural. Still, the sound is very well integrated and balanced. The highs do not "stand out" from the mix.
The K&H may well be better, but at a sizeable premium. The package price of the Opals is hard to beat. Low volume is ok; some older versions did have low level hum, corrected later.