Frequency Response (-10dB): 62 Hz – 20 kHz
Frequency Response (±3 dB): 96 Hz – 15 kHz
Power Rating: IEC System Long-Term Ratings (low-Z direct):
100 Watts Continuous Program Power
50 Watts Continuous Pink Noise (200W peak), 100 hrs
Rated Noise Power: 30W (30W tap)
Rated Noise Voltage: 70V/100V (with 70V/100V tap settings)
Sensitivity: 91 dB (1kHz - 16 kHz)
EN54 Sensitivity (@ 4m): 77 dB (per EN54-24 spectrum and measurement conditions at 4 meters).
Coverage Angle: 110° conical (1 kHz - 16 kHz)
Coverage Angles(by Frequency) Conical (Vertical & Horizontal): 500 Hz: 180°1000 Hz: 160°2000 Hz: 155°4000 Hz: 92°
Reference Axis: Specification and measurement reference is directly on-axis vertically and horizontally, directly below the speaker as speaker it is installed in the horizontal ceiling plane
Directivity Factor (Q): 7.8
Directivity Index (DI): 8.2 dB
Maximum SPL (1m): 108 dB (low-impedance, 116 dB peak)
106 dB (top 70V/100 tap)
EN54: 91 dB (4m, top 70/100V tap)
EN54 Max SPL (@ 4m): 91 dB (per EN54-24 spectrum and measurement conditions, 30W tap, at 4 meters)
Impedance: 8 ohms (in direct/bypass 8 ohm setting); EN54 nominal impedance 7 ohms (based on min Z of 5.7 ohms at 11.2 kHz) 3.8W@70V; 7.5W@100V Tap: 1333O 7.5W@70V; 15W@100V Tap: 667O 15W@70V; 30W@100V Tap: 333O 30W@70V; N/C@100V Tap: 166O
Transformer Taps: 30W, 15W, 7.5W @ 70V or 100V (plus 3.8W @ 70V only)
Crossover Network: 12 dB/oct (2nd order) low-pass to LF driver, 12 dB/oct (2nd order) high-pass to HF driver
Fuse: Thermal Fuse, open temperature 152 degrees C, Rating >= 10A @ 250VAC
Drivers: LF Driver: 165 mm (6.5 in)
HF Driver: 19 mm (3/4 in)
Connections: Input +, Input -, Earth (connected to backcan). Ceramic with brass inserts (3.2 mm/0.126 in opening), accommodates 2.5 sq mm / 12 AWG wire.
Gland Nut/Strain Relief: Accommodates round jacketed cables 4.0 mm (0.16 in) through 9.0 mm (0.36 in)
Materials: ABS baffle with UL94-V0 and UL94-5VB flame class fire rating; Zinc-plated steel backcan
Safety Agency: EN54-24:2008 certified Type A (Certificate No. 0359-CPR-00485); Compliant with BS5839/8; UL1480, UL2043, NFPA90 & NFPA70; Suitable for use in air handling spaces, Signaling Speaker; rated IP-21 per IEC529/60529; 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: 253 mm diameter x 262 mm from back of baffle to back of gland nut (10.0 in diameter x 10.3 in in depth)
Ceiling Cutout Size: Circular cutout with 223 mm (8.8 in) diameter (cardboard cutout template included)
Ceiling Thickness Range: Up to 38 mm (1.5 in) with stock dog-ears. MTC-TCD thickceiling dog-ears available for up to 60 mm (2.4 in) ceiling thicknesses
Safety Seismic Attachment: One point, top surface
Net Weight: 3.4 kg (7.4 lbs, one speaker)
Shipping Weight: 11.2 kg (24.7 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, grille
Optional Accessories: MTC-16WG high humidity grille MTC-26NC new construction bracket MTC-26MR 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
Input Connectors: Ceramic block with brass inserts
Color: White
Backcan: formed steel (included "blind-mount")
Plenum Usage: Yes, backcan included
4.4 
