Martin Audio Blackline X115 1 x 15" Subwoofer. 
 
600 watt 15" sub to add deep musical bass to your Blackline X12 or X8s. 
 
Martin Audio Blackline X115 Specifications:
 
Type:  Compact, direct radiating subwoofer
Frequency Response :  45Hz-150Hz ± 3dB, -10dB @ 40Hz
Driver:  15” (380mm)/3” (75mm) voice coil, long excursion, ferrite magnet
Rated Power:  500W AES, 2000W peak
Recommended Amplifier:  MA3.0, MA5.0Q
Sensitivity:  102dB
Maximum SPL:  129dB continuous, 135dB peak (half space)
Nominal Impedance:  8 ohms
Dispersion (-6dB):  Omnidirectional
Crossover:  80-120Hz active (with DSP)
Enclosure:  Birch/poplar ply
Finish:  Black textured paint
Protective Grille:  Black perforated steel
Connectors:  3 x NL4 type
Pin Connections (INPUT):  1+/1-
Pin Connections (LINK):  A: 1+/- to 1+/-, B: 2+/- to 1+/-
Physical & Dimensions
Fittings:  16 x M10 inserts, pole-mount socket, 2 x bar handles, provision for castors
Dimensions:  (W) 465mm x (H) 590mm x (D) 565mm
Weight:  27kg