Does Martin still have hair???

Can't help feeling that he will be pulling it out at the thought of re-testing with a shroud fitted

You make a valid point though ... when this is about sound and sound quality it is one possibility that must be investigated at least for a few of these even if only to prove or disprove the theory.

Shazza, good thinking there. Personally, I came to this wanting to know if there is a high speed (read performance) fan which would also be capable of being turned down when the rig is not being pushed hard. I am still looking for that one that overlaps the ap15 and Delta .....now just need to get another couple of fans to Martin.....and hope he is willing