Hello Martyn,
I also bought myself a pair of Rogers Studio-3's, early last year.
It seems like you've bought the (mk1) version of the Studio-3 which is different (though much better looking!) than my (mkII) version.
(I still haven't been able to find any information regarding the mk2 version, on the internet)
Yours have the same cabinet as the LS3/5a. My Studio 3 only has the same dimensions but they have curved edges on the front,
which give them a slighty more thin cabinet look. (like the very early LS3/5a)
Mine came in some ugly 70's-look walnut veneer.
(although the manual states that they were also available in rosewood and black ash)
recommended positioning/placement, according to my Studio-3 manual:
"The Studio 3 will sound at its best when mounted on high mass supports approximately 60cm high./
On dedicated stands with maximum distance 150mm(6") from rear wall."
I must say I got best results moving about 300mm(12") from the rear wall.
Here's a few pics:
I currently have some B&W N805's in the house, and even though they look way much better than the ordinary Rogers,
the Rogers piss all over 'em.
The Rogers are fast, open, detailed and highly musical.
The B&W are...well, none of the above. (in my system)
Is it possible for you to place some pictures of your Studio-3's ?
regards,
Alco