Passive system with external amplifier, used for mastering. The amp is a Bryston.
Excellent overview of a mixing. Listens detailed but not excessive (too much detail I think we lose the global vision of a mix, which is not suitable for mastering).
Used for about a year. The only feature to look for is that these speakers can leave a very big noise without being noticed (and we wonder why we have ears hurt late in the day). There is no more need to raise the level to hear properly what we do. I had to get used to, but some customers do not realize it and go up the level (I'm going to pee during that time).
Really very good plays, no regrets.