Ok I put this on players, alltho it relates to amps too.

I searched from Google about Behringer BB210 cab, and found this guy.
http://www.martinengelien.de/Lineup.asp?L=ENG&UID=

He has been developing some Behringer products, Like BX4500H head and BB210 cab. And he has signature from Sandberg.

What is the point of this thread?
I found it interesting that there have been one pro player (alltho I have never heard about him) developing those higly controversial Behringer products.....

Sorry if you think this is totally pointles....:hmm:

Well, Martin Engelien used to play with a couple of pretty famous German rock - pop singers in the 80s and 90s, recorded lots of albums and toured massively through Germany & Europe. He is quite well known but not considered a "top-player" in terms of skills&chops. (The best ones are always the less famous.)
For the last 7 or 10 years he focused more on workshops, clinics and things like that. I didn't know he was involved in developing Behringer stuff, btw. never heard those amps and cabs, just heard lots of bad (more or less) things 'bout them.
I guess people like him just have to take any good chance to stay in the business which, of course, is absolutely ok.