Mr. Moleski said the KSN1188a (800hz) driver will work in both lens equally well, no loss of low end response with the smaller 1151 lens. He commented further that all of their screw-on drivers will work on either of these lens.

Spec sheets are no longer available from CTS. Their spec sheets all say Motorola and they cannot give these out.

The piezo products division was acquired from Motorola by CTS in 1999, and it is the same product, made and sold by the same people. Nothing has changed but the sign in front of the building (and I suppose, who signs their paychecks!). But he assured me their products continue to maintain the same high quality.