Pre-Install In-Ceiling Tile Bridge for Pre-Install Backbox

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Pre-Install In-Ceiling Tile Bridge for Pre-Install Backbox

The MTC-81TB8 tile bridge is designed for use in applications requiring pre-installed backcans in suspended ceiling applications and is compatible with ceiling speakers having a 286 mm (11.25 in) mounting circle diameter, such as the JBL 8138 ceiling loudspeaker, and the JBL MTC-81BB8 pre-install backbox.


  • Fits 8138 speaker and MTC-81BB8 backbox
  • Load-bearing bridge eliminates ceiling tile sag by distributing weight to the ceiling’s support system
  • Rust-resistant 19-Gauge (1 mm thick) steel construction and e-coated finish ensures long service life.
  • Fits 610 mm (24 in) and 600 mm (23.6 in) tile grids


  Version Language Size Uploaded
file type icon MTC-81TB8 Spec Sheet
updated: Oct 2020
    186 KB Oct 2020
file type icon MTC-81TB8 Hi Res Image
updated: Oct 2020
    4.36 MB Oct 2020

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Parts & Service


Material 19 gauge (1.0 mm thickness) steel, finished in black polymer e-coating for a high level of rust resistance.
Attachment Points 4 clip-nuts (ie, speed-clips, tinnerman clips) fit 4 mm tapping screws attaching speaker to tile bridge.
Thru-Holes 4 thru-holes on 286 mm (11.25 in) mounting circle for attaching tile bridge to backcan
Dimensions (L x D) 600 mm (23.6 in) length x 359 mm (14 in) width
Net Weight (each) 0.9 kg (2.0 lbs)
Shipping Weight (ea) 1.3 kg (2.7 lbs)
Associated Models 8138 200 mm (8 in) ceiling speakerMTC-81BB8 backbox


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Pre-Install In-Ceiling Tile Bridge for Pre-Install Backbox