Biamp Desono SPA-TR300 Trim Ring (10-Pack)

The Biamp Desono SPA-TR300 is a finish trim ring for the Desono DX-IC4 and DX-IC4LP ceiling loudspeakers, sold in a 10-pack.

It covers the mounting cutout around the loudspeaker for a clean finished edge once installed. This is the current DX-series part number for the ring previously sold as D45-CATR-10PK, per Biamp's DX-series rebrand cross-reference.