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JBL 8138 8-inch, Full-range, In-Ceiling Loudspeaker (4-Pack)

Model: 8138x4

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About: JBL 8138 8-inch, Full-range, In-Ceiling Loudspeaker (4-Pack)

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


  • 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.
  • 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)
  • Included Accessories Integral grille, 4 pcs M4 x 40 mm tapping screws
  • Optional Accessories MTC-81BB8 backcan, MTC-81TB8 tile bridge is a Canadian authorized JBL retailer.

Reviews: JBL 8138 8-inch, Full-range, In-Ceiling Loudspeaker (4-Pack)

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Warranty: JBL 8138 8-inch, Full-range, In-Ceiling Loudspeaker (4-Pack) Warranty:

30 Days

Manufacturer's Warranty:

Pro Products:

The warranty on JBL professional loudspeaker products (except for enclosures, electronic components, and portable products) is valid for 5 years from the date of the first consumer purchase. Enclosures and electronic components are warranted for 1 year from the date of original purchase.

Effective 1 March 2005, portable products such as EON, JRX, MRX, PRX are warranted by Soundcraft Canada’s 2 year no-fault full warranty. During this time, if your speaker fails for any reason, it will be repaired at our expense. This includes parts, labor, and one-way shipping by ground transport. Exception: VRX and SRX are excluded from this warranty.