QSC Audio specifications SB-5218/SB-7218

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SB-5218/SB-7218

Cinema Subwoofers

Features

SB-5218 features dual 500 W transducers

SB-7218 features dual 700 W transducers

Frequency range extends to below 25 Hz when used with the correct B6 filter

DCM and SF-3 signal processors optionally available

Enclosures feature vandal-resistant woofer mounting bolts

THX™ approved for professional cinema applications

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. Featuring dual 18" low- frequency transducers mounted in ported enclosures, these systems extend response to the lowest audible frequency.

The two custom 18" transducers were developed especially for cinema use. The woofers feature 4" voice coils and vented pole pieces to ensure cool operation, even at high power levels. Cooler temperatures increase driver lifespan and decrease power compression at high drive levels. 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. This prevents potentially audible port turbulence noise. Both internal and external port openings are flared.

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.

THX is a trademark of THX Ltd.

Specifications

SB-5218

SB-7218

 

 

 

Frequency Range1

 

 

-6 dB half space

24 Hz - 100 Hz

22 Hz - 100 Hz

-10 dB half space

19 Hz - 250 Hz

19 Hz - 250 Hz

 

 

 

Maximum Output2

 

 

Calculated Peak at Rated Power

135 dB

137 dB

Calculated Continuous

129 dB

130 dB

 

 

 

Impedance

4Ω nominal

4Ω nominal

 

 

 

Maximum Input Power3

 

 

100 hours of 6 db crest factor

800 W RMS

1200 W RMS

IEC 268 noise spectrum

 

 

2 hours of 6 db crest factor

1000 W RMS

1500 W RMS

pink noise, 50 Hz - 20 kHz,

 

 

AES method

 

 

Recommended Amplifier Power

1600 W RMS maximum

2600 W RMS maximum

 

 

 

Sensitivity 1 watt /1 meter,

99.5 dB

101 dB

half space

 

 

 

 

 

Transducers

Two 18" (457 mm) 500 W high

Two 18" (457 mm) 700 W high

 

efficiency subwoofer transducers

efficiency subwoofer transducers

 

featuring 4" (100 mm) copper

featuring 4" (100 mm) copper

 

coils on Kapton formers

coils on Kapton formers

 

 

Recommended Processing

LF boost frequency = 25 Hz, Q = 2.0, Gain = +6 dB provided by QSC,

 

SF-3 or DCM

 

 

 

Connectors

Barrier strip screw terminals accept up to #10 AWG stranded wire

 

 

Enclosure

B6 alignment, vented enclosure with summetrical port design, tuned to

 

25 Hz, constructed of MDF and heavily braced. Features vandal resistant

 

woofer mounting bolts

 

 

 

 

Dimensions (HWD)

30" x 48" x 24"

 

 

(762 mm x 1220 mm x 610 mm)

 

 

 

 

Weight - Net

205 lbs (93 kg)

210 lbs (95 kg)

 

 

 

1)All frequency ranges specified refer to measured free field response (half space, 2π).

2)Calculated SPL at 1m, (half space, 2π), speaker operating at rated RMS power with pink noise within specified frequency range.

3)Maximum input power tested in accordance with IEC 268-5 recommendations, 50 Hz - 20 kHz band limiting, 6 dB signal crest factor.

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Contents SB-5218/SB-7218 SB-5218/SB-7218 MacArthur Blvd., Costa Mesa, CA, 92626 USA IntroductionNormal Connection ConnectionsModification Individual Transducer Connection requiresSpecifications subject to change without notice Contacting QSC Audio Products QSC Audio Products 3 Year Limited WarrantyDisclaimer TD-000150-00 Conexión normal ConexionesConexión en paralelo de un segundo SB-5218/7218 Conexión del transductor individual requiere modificaciónEspecificaciones sujetas a cambio sin previo aviso Renuncia Cómo comunicarse con QSC Audio ProductsGarantía limitada de 3 años de QSC Audio Products Manuel dutilisation de systèmes de haut-parleurs de cinéma SB-7218Branchement normal BranchementsSB-5218/7218 En parallèle Plage de fréquence DimensionsPuissance maximale ImpédanceAvis de non-responsabilité Pour contacter QSC Audio ProductsQSC Audio Products Garantie limitée de 3 ans Zoll-Doppelwandler Einführung Kinolautsprecheranlagen BenutzerhandbuchNormaler Anschluss VerbindungenParalleler Anschluss des zweiten SB-5218/7218 Beispiel eines normalen AnschlussesMaximaler Ausgang Frequenzbereich SB-5218 SB-7218Impedanz Maximale Eingangsleistung Empfohlene Verstärkerleistung EmpfindlichkeitHaftungsausschluss Kontaktaufnahme mit QSC Audio ProductsBeschränkte Dreijahresgarantie durch QSC Audio Products SB-5218 和 SB-7218 双 -18 亚低音扬声器 单个换频器连接 (需要修改) 产品规格如有改变恕不另行通告。 保修 (仅限美国;其它国家,请联系您的经销商或分销商)