Try sending mail to Alan Yun at Silverline (sales@silverlineaudio.com) and ask him. A third Sonata III would match quite well. :) A Sonatina III has 3 of the same drivers as the Sonata. Also, I just noticed Silverline does sell a center channel speaker, Center Stage.
I've listened to Sonata IIIs and the only reason why (IMO) you'd need a sub is if you listened to music with mass quantities of low frequency sound. A lot depends on the size of your room, too. For HT, a sub is a necessity 99% of the time.
larry
I've listened to Sonata IIIs and the only reason why (IMO) you'd need a sub is if you listened to music with mass quantities of low frequency sound. A lot depends on the size of your room, too. For HT, a sub is a necessity 99% of the time.
larry