8" (200 mm) Full-Range In-Ceiling Loudspeaker for use with Pre-Install Backcans


8" (200 mm) Full-Range In-Ceiling Loudspeaker for use with
Pre-Install Backcans

The 8138 is an 8" ceiling speaker designed for use with a pre-install inceiling backcan, resulting in highfidelity performance at a costeffective price point. The 8138 is ideal for a wide variety of commercial sound applications from restaurant and retail to professional offices and reception areas.



  • Stylish, contemporary appearance enhances any decor.
  • Clear sound from an 8 inch dualcone full-range driver.
  • Very high sensitivity of 97 dB for maximum sound levels using minimum amplifier power.
  • 6W transformer for use on 70V/100V distributed speaker lines
  • Installs to in-ceiling backboxes having 4 mounting points on an 11.25" (286 mm) diameter mounting circle.
  • For use with MTC-81BB8 backcan and MTC-81TB8 tile bridge


  Version Language Size Uploaded
8138 Spec Sheet
updated: 4月29日
    363.0 KB 4月29日
Ceiling Speaker Accessory Guide
updated: 10月18日
    126.9 KB 10月18日
Commercial Sound Full Line 2015 Catalog
updated: 10月21日
    2.0 MB 10月21日
Full Line 2015 Catalog
updated: 1月11日
    11.7 MB 1月11日
8138 Declaration of Conformity
updated: 10月18日
    88.0 KB 10月18日
Distributed System Design (DSD) v3.6.2
version 3.6.2, updated: 1月14日
3.6.2     804.8 KB 1月14日
8138 Frequently Asked Questions
updated: 4月29日
    31.5 KB 4月29日
8138 Hi Res Image
updated: 4月29日
    12.1 MB 4月29日
Speaker Tunings
Commercial, CBT, and AWC Tunings 181030
updated: 2月24日
    557.0 KB 2月24日

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组件 200 mm (8 in) Full-Range, Dual-cone
Frequency Range (-10 dB) 95 Hz – 18 kHz
Coverage (2 kHz) 90° conical
Sensitivity (2.83V@ 1m) 97 dB (1 kHz - 8 kHz)
Driver Power Capacity 40W (160W peak), 2 hrs25W (100W peak), 100 hrs
70V/100V Transformer Taps 6W, 3W, 1.5W, (0.75W at 70V only)
端接 Bare Wire
Magnet 10 ounces (283 g)
Safety Agency Transformer is UL registered per UL1876
安装方式 Full assembly consists of 8138 speaker plus MTC-81BB8 backbox andMTC-81TB8 tile bridge. Four screw holes at industry standard 286 mm (11.25 in) mounting circle.
Dimensions (Diameter x Depth) 327 mm (12.9") diameter baffle x 84 mm (3.3") depth from back of baffle. Overall depth, 99 mm (3.9")
Mounting points 4 points on 286 mm (11.25 in) diameter mounting circle
Ceiling Cutout Dimension 300 mm (11.75") with tile bridge and backbox.228 mm (9.0") diameter as stand alone.
净重量 1.4 kg (3.0 lb)


Integral grille, 4 pcs M4 x 40 mm tapping screws
Optional Accessories MTC-81BB8 backcanMTC-81TB8 tile bridge



8" (200 mm) Full-Range In-Ceiling Loudspeaker for use with Pre-Install Backcans