Owner's Manual

LCT 81C/T
Low-Prole Lay-In 2' x 2' Ceiling Tile
Loudspeaker with 200 mm (8 in) Driver
Key Features:
► Component:
• High eciency 200 mm (8 in) dual-cone driver.
► Easy lay-in installation into 2' x 2' US-style 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-prole at just 103 mm (4.1 in) deep, to t 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 ampliers
into maximum sound level for listeners.
► Designed for high speech intelligibility.
► 100° coverage pattern (conical).
► UL1480A and UL2043 certications for use in ceiling plenum
spaces.
Applications:
LCT 81C/T is a full-range ceiling speaker designed to lay into a 2
ft x 2 ft US-style suspended grid ceiling, with no cutting of ceiling
tiles required, making for an easy and cost-eective installation with
a minimum of mess. e low prole depth of only 100 mm (4 in)
allows the speaker to t in locations where deeper loudspeakers do
not.
is loudspeaker is designed to provide excellent performance for
paging 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.
e very high sensitivity of 96 dB provides maximum sound level,
even at low tap settings.
LCT 81C/T contains a 200 mm (8 in) dual-cone driver with
a very high 96 dB sensitivity. e 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.
e 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 amplier. 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. e
color of the perforated grille is white.
(Not for metric 600 x 600 metric ceiling systems.)
Specications:
System:
Frequency Range (-10 dB)
1
: 100 Hz – 16 kHz
Power Capacity (at low-Z)
2
: 40 Watts Continuous Program Power
20 Watts Continuous Pink Noise
Nominal Sensitivity
3
: 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/ru 8Ω setting)
Transformer Taps: 10 W, 5 W, 2.5 W @ 70V or 100V
(plus 1.3 W @ 70V only)
Transducer:
Full-Range Driver: High-eciency 200 mm (8 inch) dual-cone driver
with 25 mm (1 in) 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 bae, and perforated
grille
Grille Color: White
Safety Agency: Suitable for use in air handling spaces. Certied
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: 607 x 607 x 103 mm (23.9 x 23.9 x 4.1 in)
Net Weight: 7.1 kg (15.7 lbs)
Shipping Weight: 8.3kg ea; 16.5 kg per pair-pack
(18.3 lbs ea; 36.4 lbs per pair-pack)
Ceiling Cutout Size: No cutout required. Speaker drops into
ceiling grid (see installation drawing)
Suspension / Safety-Seismic
Attachment Points: Two tabs on back bae, plus 4 holes in corners
1
Half-space (ush mounted in ceiling)
2
Continuous Pink Noise Rating is IEC-shaped pink noise with a 6 dB crest factor for 100 hours continuously.
Continuous Program Power is a conservative expression of the system’s ability to handle normal speech and
music program material, and is dened as 3 dB above the Continuous Pink Noise Rating.
3
Half-space (in ceiling) average 2 kHz to 6 kHz.
JBL continually engages in research related to product improvement. Changes introduced into existing products
without notice are an expression of that philosophy.
Commercial Series