SPECIFICATIONS
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
Maximum 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 6.0
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
Materials 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
Dimensions 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
4.4 
