Biamp mask4 20w original

Operating Mode Passive
Operating Environment Indoor/Outdoor
Operating Range (-10dB) 65 Hz to 22 kHz 
Nominal Beamwidth (H x V) 100° x 50°
Transducers LF 1 x 6.5" (165 mm) coated paper cone 
HF 1 x 1" (25 mm) soft dome
Continuous Power Handling
@ Nominal Impedance 49V 150W @ 16Ω (600W peak)
Nominal Sensitivity @ 1m @ 1W
90 dB
@ 2.83V
87 dB
Nominal Maximum SPL @ 1m Peak
118 dB
Continuous
112 dB
Transformer 70V: 20W, ,15W, 7.5W, 3W
100V 20w.15W, 6W
Protection 3-step self-resetting protection
Recommended Amplifiers 150W-300W @ 16Ω (49V - 69V)
PHYSICAL
Input Connection 
Audio connections made at the ClickMount bracket; 
lever-action input and output terminals accept up to 16 AWG 
conductors
Controls Power tap / low impedance selector switch 
Mounting Provisions ClickMount bracket
Environmental IP64 per IEC 60529
Dimensions H x W x D 12.9" x 7.8" x 7.5" (328 mm x 198 mm x 190 mm) 
Weight 9.7 lbs (4.4 kg)
Finish Refer to the Technical Drawings (page 3)
Accessories (included) ClickMount bracket; safety cable
OPTIONS
Accessories
MASKCL(-BL/-W): 90° mounting bracket, black/white
MASKCV(-BL/-W): 2-cluster mounting bracket, black/white
MASKCW(-BL/-W): 4-cluster mounting bracket, black/whit