L-ACOUSTICS MTD Manual V1.2 30-11-04 64
8.5 MTD115b SPECIFICATIONS
Frequency Response
Frequency response: 65 – 14k Hz (± 3 dB) (LLC FRONT position)
Usable bandwidth: 50 – 16k Hz (-10 dB)
Sensitivity
PASSIVE
(2.83 Vrms at 1 m) 98.5 dB SPL (65 – 14k Hz)
ACTIVE
LF (2.83 Vrms at 1 m) 96 dB SPL (65 – 1.2k Hz)
HF (2.83 Vrms at 1 m) 106 dB SPL (1.2 – 14 kHz)
Power Rating Amplification* Impedance
(Long Term) (recommended) (nominal)
PASSIVE 46 Vrms 265 Wrms 1060 Wpeak 530 W 8 ohms
ACTIVE
LF 46 Vrms 265 Wrms 1060 Wpeak 530 W 8 ohms
HF 35 Vrms 150 Wrms 600 W peak 600 W 8 ohms
*Amplifiers must have 32 dB gain for LLC 115b-st or LLC115b-2w sense return protection to function properly
Nominal Directivity (-6 dB)
Axi-symmetrical 85° (± 20°)
System Output SPL
One enclosure 122 dB (cont) 128 dB (peak) PASSIVE/ACTIVE - FRONT mode
125 dB (cont) 131 dB (peak) PASSIVE/ACTIVE - XOVER mode
System output gives the unweighted SPL output of the system referenced to 1 m, including preset equalization
and band levelling adjustment as measured under freefield conditions.
FRONT LLC setting provides a 3 dB low frequency contour under freefield conditions
XOVER LLC setting applies a 100 Hz high pass filter
Components
LF 1 x 15” weather resistant loudspeaker (3” voice coil)
HF 1 x 1.4” exit compression driver (titanium diaphragm, 3” voice coil, coaxial assembly)
Enclosure
Height 580 mm 22.8 in
Front Width 440 mm 17.3 in
Rear Width 167 mm 6.6 in
Depth 475 mm 18.7 in
Trap Angle 41 degrees with respect to vertical
Net Weight 31.5 kg 69.3 lbs
Shipping Weight 34.5 kg 75.9 lbs
Shipping Dimensions 655 x 500 x 570 mm (25.8 x 19.7 x 22.4 in)
Connectors 2x 4-pin Neutrik speakon
Material 18 mm, 30 mm Baltic birch plywood
(sealed, screwed and rabbeted angles)
Finish Maroon-gray™
Grill Black epoxy perforated steel with acoustically transparent foam
Rigging Integrated flying hardware, handles and pole mount socket, `
Omnimount-ready
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