firstly i think the 601 601s2 and later series 3 were all designed as hi fidelity music speakers first..in addition to being offered in greater multiples as a surround sound package...b&w tend to have a sound first approach to their advertising and especially at the lower end of their range where competition is greatest..
have a rummage in their website as they should have most of their product manuals and brochures going back to the early 80s dm series still available in pdf format...
http://www.bowers-wilkins.co.uk/