A retrofit enclosure is the answer to the two problems open-back in-wall speakers create: sound spilling into the next room, and a wall cavity whose volume and construction vary from bay to bay. This Sonance rectangle enclosure, supplied as a pair and sold through the Sonos Architectural by Sonance line, gives each speaker a sealed, consistent back volume instead of whatever happens to be behind the drywall.
Sonance builds it from glass-reinforced polypropylene and rates it at approximately 20 dB of sound isolation, which is meaningful in the places these speakers usually go - a bedroom wall shared with a media room, an office next to a family space, a hallway above a nursery. The consistent enclosed volume also tightens up bass response, since the speaker is no longer loading into an unpredictable cavity.
As the name says, it is a retrofit part: it installs into an existing wall through the speaker cutout, so no framing access is required. For new construction, specify the flex bracket instead. It fits the Visual Performance rectangle format used by Sonos In-Wall by Sonance speakers.
Key Features
- Sold as a pair - one enclosure per speaker
- Approximately 20 dB of sound isolation between rooms
- Glass-reinforced polypropylene construction
- Gives every speaker the same enclosed back volume
- Retrofit installation through an existing wall cutout
Why Buy This From 4TEC Direct
4TEC Direct is an authorized Sonos dealer, backed by 4TEC Integration — the commercial AV design and installation firm we have run since 2003, with over 35 years of combined experience in commercial AV design, programming, and sales. The people who answer your call are the same engineers who scope conference rooms, training centers, and whole-home audio systems every day.
- Authorized Sonos dealer — genuine, factory-fresh product with full manufacturer warranty
- Certified designers and programmers on staff — CTS, CTS-D, and CTS-I credentialed
- Free pre-sale system design — call before you order and we will spec the right zones, amps, and speakers
- Professional installation and 24/7/365 managed support available through 4TEC Integration
- Serving clients since 2003 from Omaha / Gretna, Nebraska — shipping nationwide
Questions before you buy? Talk to a real AV engineer: 402-909-0130 or sales@4tecdirect.com.