We recently did an installation with our M-60s are our local dealer who has the 1.7 in stock- so I heard it with our amps. IMO this is an excellent speaker and a nice upgrade from the prior 1.6; no doubt why this speaker has been big news as Magnaplanar does not offer new models very often. It is very fast and detailed, yet relaxed, images easily and is not hard to drive at all (after all we did it with a 60-watt OTL).
