JBL MTC-81BB8 Pre-Install Backcan

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Backcan for 8138 SpeakerThe MTC-81BB8 from JBL is a pre-install in-ceiling backcan designed for 11.25" ceiling speakers, such as the 8138. It has an industry-standard mounting circ le, and an extra-large volume to provide extra bass response. It has 5 conduit knockouts for running cables, and has the ability to nest during storage to minimize space requirements. Show more