Altec Lansing DS912-8A Full Range Speaker Cabinet

FREQUENCY RESPONSE 1, 280 Hz - 15 kHz  (±3 dB)
USABLE LOW FREQUENCY LIMIT (-10 dB) 1, 255
HzSENSITIVITY 3100 dB
SPLPOWER HANDLING 4125 W continuous; 500 W peak
MAXIMUM OUTPUT (1 m) 5121 dB SPL continuous; 127 dB SPL peak
COVERAGE ANGLES 690o(horizontal) x 90o(vertical)
DIRECTIVITY FACTOR, Q 69.47
DIRECTIVITY INDEX, Di 69.76 dB
TRANSDUCER COMPONENTSLF: 1x 12 in. Woofer in a Vented Enclosure (CD912-8B)HF: 1x 1.5 in. Phenolic Dome Tweeter (CD912-8B)
IMPEDANCE 7Nominal: 8.0 OhmsMinimum: 5.0 Ohms at 5,500 Hz
CROSSOVER FREQUENCYPassive LF-HF:  2,200 Hz 
HARMONIC DISTORTION 81% rated power 10% rated power2nd Harmonic     0.28% 2nd Harmonic     1.02%3rd Harmonic 0.49% 3rd Harmonic      0.84%THD 0.80% THD                    1.88%
INPUT CONNECTIONS:1x 4 position barrier strip and 2x NL4
ENCLOSURE MATERIALS & FINISH:18 mm, 13 ply Poplar Plywood Finished with Charcoal Grey or White Catalyzed Polyurethane
SUSPENSION SYSTEM 9Working Load Limit (maximum weight applied to uppermost mounting point): 250 lbs. (113.6 kg)     12x 3/8 in.-16 Threaded Mounting Suspension Points (3 each top & bottom and 2 each sides & back)
DIMENSIONS22.00 in. (H) x 18.75 in. (W) x 13.71 in. (D) x 7.25 in. (W rear)559 mm (H) x 476 mm (W) x 349 mm (D) x 184 mm (W rear)
WEIGHTNet:   45 lbs. (20.2 kg)Shipping: 53 lbs. (23.9 kg)