Features

  • Four-way selectable, tri or quad- amplified screen channel system
  • Unique HF/VHF diaphragm has less mass than traditional diaphragms resulting in exceptional dynamic range, extended high frequency response and lower distortion
  • LF-4215 is constructed of MDF and is heavily braced
  • Low-distortion waveguides provide highly articulate dialogue
  • Shallow depth (20-inch) facilitates installation
 
SPECIFICATIONS
 
SC-424
Nominal Coverage 90° horizontal by +20 to -30° vertical
Frequency Range (-6 dB) 33 Hz–20 kHz
Active Crossover Frequencies 250, 1700, and 6000 Hz, 24 dB per octave
  LF-4215 MHV-1090
Impedance 4 ohms MF: 8 ohms
HF: 8 ohms
VHF: 8 ohms
Sensitivity 1 watt/1 meter, half space 99.5 dB  
Tri-amp
MF:105 dB
HF/VHF: 110 dB
Quad-amp
MF: 105 dB
HF: 110 dB
VHF: 110 dB
 
Maximum Input Power 1    
8 hours of 6 dB crest factor
IEC 268 noise spectrum
800 watts continuous  
2 hours of 6 dB crest factor pink
noise, 50 Hz–20 kHz, AES method
1000 watts continuous  
MF: 275 W continuous
HF/VHF: 200 W continuous
 
MF: 275 W continuous
HF: 100 W continuous
VHF: 100 W continuous
 
Recommended Amplifier Power 1600 watts continuous maximum MF: 800 W continuous
HF: 500 W continuous
VHF: 300 W continuous maximum
     
Recommended Processing Subsonic filter below 30 Hz, >18 dB per octave 4th order LR crossover at 250, 1700, and
6000 Hz via QSC processing
Connectors Barrier strip screw terminals accept up to #10 AWG stranded wire Barrier strip screw terminals accept up to #10 AWG stranded wire
Transducers Two 15-inch (381mm) high efficiency, extended bass woofer featuring a 4-inch copper voice coils MF: 10-inch high-effeciency, horn-loaded cone with phase plug
HF/VHF: coaxial neodymium compression driver with 3.5-inch (90 mm) HF diaphram and 1.75-inch (44 mm) VHF diaphram
Enclosure Quasi B4 alignment, ported enclosure with fully flared ports, symmetrical port design, tuned to 36 Hz, constructed of MDF and heavily braced. Features vandal resistant woofer mounting bolts Tilt/Pan Bracket
± 10° vertical tilt
± 10° horizontal pan
Dimensions (HWD) inches 36 × 30 × 20.3 39 × 30 × 20
Dimensions (HWD) mm 762 x 910 x 516 762 x 990 x 508
Net Weight 172 lb (78 kg) 84 lb (38.5 kg)
System Weight 256 lb (116 kg)
Baffle Cut-Out 76-inch × 32-inch

Specifications are subject to change without notice.