Lowell ES-4-RTR Steel Trim Ring for 4 Inch Speaker Retrofit

The Lowell ES-4-RTR is a steel trim ring designed for integrators and installers retrofitting the ES-4T speaker into existing 8-inch speaker enclosures. Rather than replacing an entire enclosure, this ring allows a 4-inch driver to seat correctly within a larger cutout, preserving the existing infrastructure while upgrading or replacing the speaker element.

This trim ring is suited for installed sound environments such as classrooms, conference rooms, hospitality spaces, and houses of worship where older enclosures are in place and a full replacement is not practical or cost-effective. The white powder epoxy finish blends with standard ceiling and wall surfaces for a clean, professional appearance. Hardware and rubber bumpers are included, covering everything needed for a complete installation. Refer to the Lowell spec sheet for required enclosure dimensions before ordering, as minimum enclosure depth applies.