Low-Profile Lay-In 600 mm x 600 mm Metric Ceiling Tile Loudspeaker with 200 mm (8 in) Driver


Low-Profile Lay-In 600 mm x 600 mm Metric Ceiling Tile Loudspeaker with 200 mm (8 in) Driver

JBL-LCT 81C/TM is a full-range ceiling speaker designed to lay into a 600 mm x 600 mm metric suspended grid ceiling, with no cutting of ceiling tiles required, making for an easy and cost-effective installation with a minimum of mess. The low profile depth of only 103 mm (4.1 in) allows the speaker to fit in locations where deeper loudspeakers do not.

This loudspeaker is designed to provide excellent performance for voice reinforcement and light-to-medium music in a wide variety of applications, including education classrooms, business music systems, retail stores, music/paging systems, airports, reception/waiting rooms, lounges, courtrooms, meeting rooms, and more.

The very high sensitivity of 96 dB provides maximum sound level, even at low tap settings. JBL-LCT 81C/TM includes a 200 mm (8 in) dual-cone driver with a very high 96 dB sensitivity. The driver features a 25 mm (1 in) diameter voice coil with a Kapton coil-former and high-temperature wire for better power dissipation and long-term reliability. The speaker's built-in 10 Watt transformer provides versatility by allowing use on 100V or 70V distributed loudspeaker lines, as well as at 8 ohms (low impedance) for driving directly from a low impedance power amplifier. Adjusting is convenient via a rotary switch on the side of the rear enclosure. Two safety seismic attachment tabs are provided for securing to ceiling deck, plus 4 holes are provided -- one in each corner. The color of the perforated grille is white.

Not for US-size 2’ x 2’ ceiling systems. Use model LCT 81C/T for US 2’ x 2’ ceilings.


  • High efficiency 200 mm (8 in) dual-cone driver.
  • Easy lay-in installation into 600 mm x 600 mm metric suspended grid ceilings. No cutting of ceiling tiles is necessary.
  • Perforated metal grille included.
  • Combined 70V/100V and low impedance direct operation.
  • 20 Watts at 8Ω (low-impedance) direct setting.
  • 10 Watt multi-tap at 70V/100V with taps at 10W, 5W, 2.5W (and 1.3W for 70V only)
  • Very low-profile at just 103 mm (4.1 in) deep, to fit into ceilings that are shallow or that contain obstructions.
  • Easy bare-wire connection in protected compartment. Wire entrance from either top or side via knock-out.
  • Very high 96 dB sensitivity turns power from small amplifiers into maximum sound level for listeners.
  • Designed for high speech intelligibility.
  • 100° coverage pattern (conical).
  • UL1480A and UL2043 certifications for use in ceiling plenum spaces.


  Version Language Size Uploaded
Data Sheets
file type icon JBL-LCT 81C/TM Spec Sheet
updated: 9月 2021
    483.7 KB 9月 2021
CAD Drawings
file type icon JBL-LCT 81C/TM 2D & 3D CAD Drawings
updated: 9月 2021
    3.0 MB 9月 2021
file type icon JBL-LCT 81C/TM PDF Dimensional Drawing
updated: 9月 2021
    203.6 KB 9月 2021
BIM Objects
file type icon JBL-LCT 81C/TM BIM Object
updated: 10月 2021
    10月 2021
platform icon Distributed System Design (DSD) v3.6.2
version 3.6.2, updated: 9月 2021
3.6.2     804.8 KB 9月 2021
Ease Data
file type icon JBL-LCT 81C/TM EASE file
updated: 9月 2021
    431.0 KB 9月 2021
file type icon JBL-LCT 81C/TM CLF file
updated: 9月 2021
    326.8 KB 9月 2021

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Parts & Service


Drivers High-efficiency 200 mm (8 inch) dual-cone driver with 25 mm (1 in) diameter voice coil, Kapton coil former, and high-temperature voice coil wire.
频率范围 (-10dB) 100 Hz – 16 kHz


96 dB (2 kHz - 6 kHz)
覆盖角度 100° conical
Maximum SPL (1m) 108 dB (low-impedance, 116 dB peak) 106 dB (top 70V/100V tap)
阻抗 8 ohms (in direct/thru setting)
变压器抽头 10 W, 5 W, 2.5 W (plus 1.3 W @ 70V)
建议的保护高通 90 Hz high-pass (24 dB/oct) for 8Ω direct or any 70V or 100V tap setting
功率容量 (@ low-Z) 40 Watts Continuous Program Power 20 Watts Continuous Pink Noise
输入接口 Bare wire inside protected in touch-proof wiring compartment.
Tap Selector Rotary switch accessible from side of backcan
Materials Steel rear enclosure, front baffle, and perforated grille
网罩 White
Safety Agency Suitable for use in air handling spaces certified per UL1480A, Speakers for Commercial and Professional Use; UL2043, Standard for Fire Test for Heat and Visible Smoke Release for Discrete Products Installed in Air-Handling Spaces; NFPA90 & NFPA70; S7232/UL Listed, Signaling Speaker.


595 x 595 x 103 mm (23.4 x 23.4 x 4.1 in)
净重量 6.9 kg (15.2 lbs) each


15.5 kg (34.2 lbs) per pair-pack
Ceiling Cutout Size No cutout required. Speaker drops into ceiling grid
Suspension / Safety-Seismic Attachment Points Two tabs on back baffle, plus 4 holes in corners
额定功率 See transformer taps
颜色 White
Backcan formed steel (blind-mount)
Baffle/Rim Metal
Plenum Usage Yes, backcan included



HARMAN Professional Solutions:


Low-Profile Lay-In 600 mm x 600 mm Metric Ceiling Tile Loudspeaker with 200 mm (8 in) Driver