Owner's Manual

Specifications (subject to change without notice)

SB-5218 SB-7218

Frequency Range: 24 - 100 Hz (±3 dB) 22 - 100 Hertz (±3 dB)

19 - 250 Hz useable range (-10 dB) 19 - 250 Hertz useable range (-10 dB)

Maximum Output:

135 dB SPL calculated peak 137 dB SPL calculated peak

1 meter, half space, at rated rms power with 6 dB crest factor pink noise input, 25 - 250 Hertz.

129 dBA SPL calculated maximum continuous 130.5 dBA SPL calculated maximum continuous

1 meter. The dBA scale is typically used to identify sound sources which can cause permanent hearing loss.

Impedance: 4 ohms, nom. (3.2 @ 25 Hz., 62 @ 50 Hz.) 4 ohms, nom. (3.2 @ 27 Hz., 28 @ 48 Hz.)

Maximum Input Power:

100 hours of 6 dB crest factor 800 watts rms 1200 watts rms

pink noise, 25 - 250 Hertz

2 hours of 6 dB crest factor

1000 watts rms 1500 watts rms

pink noise, 25 - 250 Hertz, AES method

Recommended Amp Power: 1600 watts rms maximum 2600 watts rms maximum

Sensitivity: 99.5 dB half space 101.0 dB half space

(25 - 100 Hz, 1 watt, 1 m.) 93.5 dB full space 95.0 dB full space

Weight: 225 lbs. shipping, 205 lbs. net (102/93 kg.) 230 lbs. shipping, 210 lbs. net (104/95 kg.)

Both Models-

Nominal Coverage: Omnidirectional (80 Hz)

Recommended Processing: LF boost- freq.= 25 Hz, Q=2.0, gain= +6 dB. QSC DSP configurations are available at www.qscaudio.com. Parameters for

alternative processing hardware are available upon request.

Connectors: Barrier strip screw terminals accept up to #10 AWG stranded wire. Four terminals: (two INPUT and two PARALLEL OUT).

Drivers are internally wired in parallel. For independent transducer connection, remove blue jumper wire and yellow

jumper wire on internal-side of terminal cup and mark enclosure accordingly.

Transducers: Two 18” (457mm) high efficiency subwoofer transducers featuring vented 4” (100mm) copper voice coils on Kapton®

formers. High excursion/low distortion design, with extremely high power handling, and low thermal and port com-

pression.

Enclosure: B6 alignment, vented enclosure with symmetrical port design, tuned to 25 Hz, constructed of medium density fibre-

board and heavily braced. Features vandal resistant woofer mounting bolts.

Size: 30” wide X 48” high X 24” deep (762 mm X 1220 mm X 610 mm)