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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

JBL HPD8138 8" Ceiling Speaker for Pre-Install Backcan, Very high 97 dB sens

  • Component 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 hrs
    25W (100W peak), 100 hrs
    70V/100V Transformer Taps 6W, 3W, 1.5W, (0.75W at 70V only)
    Termination Bare Wire
    Magnet 10 ounces (283 g)
    Safety Agency Transformer is UL registered per UL1876
    Installation Full assembly consists of 8138 speaker plus MTC-81BB8 backbox and
    MTC-81TB8 tile bridge. Four screw holes at industry standard 286 mm
    (11.25 in) mounting circle.
    (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.
    Net Weight 1.4 kg (3.0 lb)
    Included Accessories Integral grille, 4 pcs M4 x 40 mm tapping screws
    Optional Accessories MTC-81BB8 backcan
    MTC-81TB8 tile bridge
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