| Frequency Range (-10dB) |
58 Hz – 20 kHz |
| Frequency Response (±3 dB) |
80 Hz – 16 kHz |
| Power Rating |
IEC system long-term ratings (low-Z direct):
180 W continuous program power
90 W continuous pink noise (360 W peak), 100 hrs |
| Maximum Input Voltage |
31.8 V RMS (2 hrs), 63.6 V peak |
| Sensitivity |
92 dB (1 kHz – 16 kHz) |
| Coverage Angle |
90° conical |
| Directivity Factor (Q) |
6.0 |
| Directivity Index (DI) |
7.8 dB |
| Maximum SPL (1m) |
112 dB (low-impedance, 118 dB peak)
110 dB (top 70V/100V tap) |
| Impedance |
8 ohms (in direct/bypass setting) |
| Transformer Taps |
60 W, 30 W, 15 W @ 70V or 100V (plus 7.5 W @ 70V only) |
| Recommended Protective High-Pass |
45 Hz high-pass (24 dB/oct) for 8-ohm operation, 60 Hz for 60W tap, 50 Hz for 30W/15W/7.5W tap settings |
| Crossover Network |
12 dB/oct (2nd order) low-pass to LF driver, 12 dB/oct (2nd order) high-pass to HF driver |
| Drivers |
LF Driver: 200 mm (8.0 in)
HF Driver: 25 mm (1.0 in) |
| 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 lb, one speaker) |
| Shipping Weight |
17.7 kg (39.0 lb, 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; one set = 24 dog-ears for 6 speakers)
MTC-48TR tile rail for 1200 mm (4 ft) tile spans |
| Color |
White |
| Backcan |
Formed steel (included, "blind-mount") |
| Baffle/Rim |
ABS baffle with UL94-V0 and UL94-5VB flame class fire rating |
| Plenum Usage |
Yes, backcan included |
