I ran across this page in the Phonak Custom Products reference guide. It says at the bottom of the page that Cerustop are not suitable for cShells with UP receivers.
I have a pair of UPs with Cerustop filters in my ears right now that I got with KS9s. When I remove the wax filters, my word recognition in Calm improves. My audiologist says that Cerustop are the only option. I see her tomorrow.
Anyone have any experience with this? I may be ordering UPs for my new iSpheres tomorrow, because I think the Ps I got with the first fitting may be causing clipping.

You’re ignoring this member’s posts.