JBL LCT 81C/T - 40W 8-inch Passive Low-Profile Lay-In 2FT x 2FT Ceiling Tile Loudspeaker with 70V/100V Transformer and 100-Degree Coverage in White Finish

The JBL Professional LCT 81C/T is a 40W 8-inch passive low-profile lay-in ceiling tile loudspeaker, designed for seamless integration into 2 ft x 2 ft US-style suspended grid ceilings. Engineered for paging and light-to-medium music applications, it offers an easy, mess-free installation without the need for cutting ceiling tiles. Its ultra-low-profile design, with a depth of just 4.1 inches, ensures compatibility with shallow ceilings or spaces containing obstructions. Ideal for classrooms, retail stores, reception areas, courtrooms, and more, the LCT 81C/T delivers exceptional speech intelligibility and clear sound performance with its high-efficiency design.

At the core of the LCT 81C/T is a high-efficiency 8-inch dual-cone driver featuring a 1-inch voice coil with a Kapton coil former for excellent power dissipation and long-term reliability. This versatile speaker supports both 70V/100V distributed systems and 8-ohm low-impedance operation. A built-in 10W transformer offers selectable taps via a convenient rotary switch, providing 10W, 5W, 2.5W, and 1.3W (70V only) options. The steel rear enclosure and perforated white grille ensure durability while blending seamlessly with ceiling aesthetics. Certified for use in air-handling spaces, the LCT 81C/T meets UL1480A and UL2043 standards, making it a safe and reliable choice for commercial installations.

Features

• 8-inch dual-cone full-range driver with 1-inch voice coil for high efficiency and reliability
• 40W continuous program power at 8Ω for robust sound performance
• Built-in transformer with selectable 70V/100V taps and 8-ohm operation
• Frequency range of 100 Hz - 16 kHz for clear audio reproduction
• Nominal sensitivity of 96 dB and maximum SPL of 114 dB peak at 8Ω
• Wide 100° conical coverage for uniform sound dispersion
• Simple lay-in installation for 2 ft x 2 ft US-style suspended grid ceilings, no tile cutting required
• Ultra-low-profile design with 4.1-inch depth for shallow ceiling compatibility
• Durable steel rear enclosure and perforated white grille for long-lasting performance
• Touch-proof wiring compartment with bare-wire input connection
• Safety certifications include UL1480A and UL2043 for air-handling spaces
• Two seismic attachment tabs and four corner holes for secure installation
• Dimensions of 23.9 x 23.9 x 4.1 inches and weight of 15.7 lbs

Specifications

System

• Frequency Range (-10 dB): 100 Hz - 16 kHz
• Power Capacity (at low-Z): 40 Watts Continuous Program Power
• Nominal Sensitivity: 96 dB
• Nominal Coverage Angle: 100° conical coverage (ave. 1 kHz - 4 kHz)
• Rated Maximum SPL: 108 dB @ 1 m (3.3 ft) average, 114 dB peak (at 8Ω setting)
• Nominal Impedance: 8 ohms (in Direct/Thru 8Ω setting)
• Transformer Taps: 10W, 5W, 2.5W @ 70V or 100V (plus 1.3W @ 70V only)

Transducer

• Full-Range Driver: High-efficiency 200 mm (8 inch) dual-cone driver with 25 mm (1 inch) diameter voice coil, Kapton coil former, and high-temperature voice coil wire

Enclosure

• Input Connection: Bare wire inside protected in touch-proof wiring compartment
• Materials: Steel rear enclosure, front baffle, and perforated grille
• Grille Color: White
• Safety Agency: Suitable for use in air handling spaces. Certified per: UL1480A - Speakers for Fire Alarm and Signaling Systems; 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.
• Dimensions: 23.9 x 23.9 x 4.1 inches
• Net Weight: 7.1 kg (15.7 lbs)
• Shipping Weight: 8.3 kg (18.3 lbs per pair-pack)
• Ceiling Cutout Size: No cutout required. Speaker drops into ceiling grid (see installation drawing)
• Suspension / Safety-Seismic Attachment Points: Attachment Points: Two tabs on back baffle, plus 4 holes in corners