JBLControl 18C/T

Two-Way 8-Inch Coaxial Ceiling Loudspeaker


Two-Way 8-Inch Coaxial Ceiling Loudspeaker

Control 18C/T is a full-range ceiling speaker consisting of a 200 mm (8.0 inch) high tech cone driver and a 25 mm soft-dome liquid cooled tweeter mounted in a vented, paintable baffle made of UV resistant UL94-V0 and UL94-5HB material, with a pre-attached blind-mount backcan for quick and easy installation. The speaker is designed to provide excellent sound quality for a wide variety of medium to high volume applications such as music cafes, business music systems, retail stores, music/paging systems, airports, reception/waiting rooms, lounges, courtrooms, convention centers, hotels, educational facilities, and more.


·       200 mm (8.0 in) high output driver with polypropylene cone and butyl rubber surround

·       25 mm (1.0 in) soft-dome liquid-cooled tweeter

·       Blind-mount backcan for quick and easy installation

·       Dual conduit/cable clamps

·       Combined 70V/100V and low impedance direct operation

o  90 Watts at 8Ω nominal setting

o  60W multi-tap at 70V/100V

·       58 Hz – 20 kHz bandwidth with 90° coverage

·       High 92 dB sensitivity for high maximum SPL

·       White or black (-BK)


Frequency Range (-10 dB)1

58 Hz – 20 kHz

Frequency Response (±3 dB)1

80 Hz – 16 kHz

Power Capacity (at low-Z) 2

180 Watts Continuous Program Power

Maxium Input Voltage

31.8 V RMS (2hrs), 63.6 V peak

Nominal Sensitivity3

92 dB

Nominal Coverage Angle3

90° conical coverage

Directivity Factor (Q) 3


Directivity Index (DI) 3

7.8 dB

Rated Maximum SPL

112 dB @ 1 m (3.3 ft) average, 118 dB peak

Nominal Impedance

8 ohms (in direct/bypass 8Ω setting)

Transformer Taps

60 W, 30 W, 15 W @ 70V or 100V (plus 7.5 W @ 70V only)

Recommended Protective High Pass4

45 Hz high-pass (24 dB/oct) for 8ohm operation, 60 Hz for 60 W tap, 50 Hz for 30 W, 15 W & 7.5 W tap setting

Crossover Network

12 dB/oct (2nd order) low-pass to LF driver, 12 dB/oct (2nd order) high-pass to HF driver

LF Driver

200 mm (8.0 inch) with polypropylene cone, butyl rubber surround, anodized aluminum voice coil former, high

temperature voice coil

HF Driver

25 mm (1.0 in), highly-damped treated-silk dome, Kapton™ voice coil, liquid cooling, wide dispersion waveguide

Input Connector

Removable locking 4-pin connector with screw-down terminals. Max wire size 12 AWG (2.5 mm2)

Connector Wiring

Pin 1 = + In; Pin 2 = - In; Pin 3 = + Loop Thru; Pin 4 = - Loop Thru

Strain Reliefs

Strain relief for two cables or two flex conduits via coupled clamping mechanism


ABS baffle with UL94-V0 and UL94-5VB flame class fire rating; Zinc-plated steel backcan

Safety Agency

UL1480, UL2043, NFPA90 & NFPA70; S7232/UL Listed, Suitable for use in air handling spaces, Signaling

Speaker; Transformer UL registered per UL1876; ROHS, C-tick N108, CE compliant; Baffle meets UL94-V0 and

UL94-5VB flammability rating; In accordance with IEC60849/EN60849 systems


307 mm diameter x 274 mm depth from back of baffle (12.1 in diameter x 10.8 in depth)

Ceiling Cutout Size

Circular cutout with 282 mm (11.1 in) diameter (cardboard cutout template included)

Ceiling Thickness Range

Up to 38 mm (1.5 in) with stock dog-ears. MTC-TCD thick-ceiling dog-ears available for up to 60 mm (2.4 in)

ceiling thicknesses

Safety Seismic Attachment

One point, top surface

Net Weight

6.4 kg (14.1 lbs, one speaker)

Shipping Weight

17.7 kg (39.0 lbs, pair in master carton)

Included Accessories

C-ring support backing plate, 2 tile support rails (for 2 ft or 600 mm tile spans; optional MTC-48TR extension

available for larger 4 ft or 1200 mm tile spans), cutout template, paint shield, removable locking multi-pin

connector, grille with safety tether.

Optional Accessories

MTC-47NC new construction bracket; MTC-47MR mud-ring construction bracket; MTC-TCD thick-ceiling

dog-ears for ceiling thicknesses up to 60 mm (2.4 in, ordering one set = 24 dogears for 6 speakers); MTC-48TR

tile rail for 1200 mm (4 ft) tile spans

1 Half-space (flush 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 defined as 3 dB above the Continuous Pink Noise Rating.

3 Half-space (in ceiling) average 1 kHz to 16 kHz.

4 For protection against driving below resonant frequency and to keep transformer out of saturation.

JBL continually engages in research related to product improvement. Changes introduced into existing products without notice are an expression of that philosophy.