JBL 8138

JBL 8138
JBL 8138

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


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)


Bare Wire


10 ounces (283 g)

Safety Agency

Transformer is UL registered per UL1876


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.

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.

Net Weight

1.4 kg (3.0 lb)

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Magna-Tech Electronic Co., Inc.
6114 NW 74th Ave.
Miami FL 33166 USA
Phone: (305) 573-7339
Fax: (305) 573-8101
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