Hi,
I listened to the Spendor 3/5 and the SF Concertinos in different stores, but in pretty similar rooms and both set up pretty well. I end up buying the Spendors.
The Spendors were a little smoother. Both imaged well, but the Spendors seemed more natural and the sound more "there." While both speakers do not have much bass below 70's, I felt the Spendors bass did not drop off as fast as the SF. This helps the Spendors to sound fuller - IMHO
I listened to the Spendor 3/5 and the SF Concertinos in different stores, but in pretty similar rooms and both set up pretty well. I end up buying the Spendors.
The Spendors were a little smoother. Both imaged well, but the Spendors seemed more natural and the sound more "there." While both speakers do not have much bass below 70's, I felt the Spendors bass did not drop off as fast as the SF. This helps the Spendors to sound fuller - IMHO