User manual QSC AUDIO SB-7218 DATASHEET 06-20-08
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QSC AUDIO SB-7218 (5662 ko)
Manual abstract: user guide QSC AUDIO SB-7218DATASHEET 06-20-08
Detailed instructions for use are in the User's Guide.
[. . . ] SB-5218/SB-7218
Features
· SB-5218featuresdual500Wtransducers · SB-7218featuresdual700Wtransducers · requencyrangeextendstobelow25Hzwhenusedwith F thecorrectB6filter · DCMandSF-3signalprocessorsoptionallyavailable · Enclosuresfeaturevandal-resistantwoofermountingbolts · HXTMapprovedforprofessionalcinemaapplications T
Cinema Subwoofers
Part of the DCS Digital Cinema Speaker Series, QSC's SB-5218 and SB-7218 subwoofers offer a unique solution that addresses the requirements of digital motion picture soundtracks. [. . . ] Undercut pole pieces provide a symmetrical magnetic gap, reducing second harmonic distortion. Enclosures are constructed of high-quality MDF panels and feature individual woofer chambers. The separate chamber for each transducer makes the enclosure stronger, provides rigidity, and prevents cone overexcursion in the rare event of a driver failure. Enclosure "loading" is not lost for the remaining transducer. Large, fully radiused ports ensure smooth airflow, especially at higher drive levels. With symmetrical port loading, the bass ports are evenly spaced on each side of the transducers, making internal pressure more uniform across the back surface of the woofer. This prevents the cone from being displaced to one side or another by unbalanced air pressure, reducing the chance of driving the voice coil out of the center of the gap at high drive levels.
Specifications
Frequency Range1 -6 dB half space -10 dB half space Maximum Output2
SB-5218
SB-7218
24 Hz 100 Hz 19 Hz 250 Hz
22 Hz 100 Hz 19 Hz 250 Hz
Calculated Peak at Rated Power 135 dB Calculated Continuous Impedance Maximum Input Power3 800 W RMS 1000 W RMS 129 dB 4 nominal
137 dB 130 dB 4 nominal
100 hours of 6 db crest factor IEC 268 noise spectrum 2 hours of 6 db crest factor pink noise, 50 Hz 20 kHz, AES method
1200 W RMS 1500 W RMS
Recommended Amplifier Power 1600 W RMS maximum Sensitivity 1 watt /1 meter, half space Transducers 99. 5 dB Two 18" (457 mm) 500 W high efficiency subwoofer transducers featuring 4" (100 mm) copper coils on Kapton formers
2600 W RMS maximum 101 dB Two 18" (457 mm) 700 W high efficiency subwoofer transducers featuring 4" (100 mm) copper coils on Kapton formers
Recommended Processing Connectors Enclosure
LF boost frequency = 25 Hz, Q = 2. 0, Gain = +6 dB provided by QSC, SF-3 or DCM Barrier strip screw terminals accept up to #10 AWG stranded wire B6 alignment, vented enclosure with summetrical port design, tuned to 25 Hz, constructed of MDF and heavily braced. Features vandal resistant woofer mounting bolts 30" x 48" x 24" (762 mm x 1220 mm x 610 mm) 205 lb (93 kg) 210 lb (95 kg)
Dimensions (HWD) Weight Net
1) All frequency ranges specified refer to measured free field response (half space, 2). [. . . ] Patents may apply or be pending.
1675 MacArthur Boulevard · Costa Mesa, CA 92626 · Ph: 800/854-4079 or 714/957-7100 · Fax: 714/754-6174
SB-5218/SB-7218 Spec Sheet 06/20/08
qscaudio. com [. . . ]
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