Hi,

£ 6000 plus VAT

No, I have heard the non "K" RL-900 many times in such conditions (Control rooms), but the 901K I only heard at KMR Audio.

However, as the 901K is designed to deal with acoustic iussues in fairly small control rooms and aparently does that well....

This little bit of reading might be of use:

http://me-geithain.de/presse/ppeng/presseppeng.html

Ciao T

PS, relevant to my answer to Simon, the MEG "K" system produces a unidirectional sound souurce, which combines elements of velocity and pressure transduction and is thus somewhere between dipole and monopole bass, however it tends much more into the dipole direction....