My bad. I have Minuettos and my experience refers to that model. I simply misread your original post.
OTOH, I wouldn't be surprised if all of the older SF bookshelf speakers were voiced in a similar manner (midbass hump) and might be a tough match for a subwoofer. Can't say for sure, though, as it's been too many years since I've listened to the other models of similar vintage to be sure.
Best of luck.
Marty
PS My Minuettos are still doing yeoman's work in my home office, 20ish years after I first brought them home. No subwoofer added.
OTOH, I wouldn't be surprised if all of the older SF bookshelf speakers were voiced in a similar manner (midbass hump) and might be a tough match for a subwoofer. Can't say for sure, though, as it's been too many years since I've listened to the other models of similar vintage to be sure.
Best of luck.
Marty
PS My Minuettos are still doing yeoman's work in my home office, 20ish years after I first brought them home. No subwoofer added.