| 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 |
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 |