SB-5218
Dual 18-inch Cinema Subwoofer

Features
- SB-5218 features dual 500-watt 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
SPECIFICATIONS | SB-5218 | |
Frequency Range 1 (-6 dB, Half space) (-10 dB, Half space) | 24–100 Hz 19–250 Hz | |
Nominal Coverage | n/a | |
Maximum Output 2 Calculated Peak at rated power Calculated Continuous | 135 dB 129 dB | |
Impedance | 4 ohms nominal | |
Maximum Input Power 3 (100 hours of 6 dB crest factor IEC 268 noise spectrum) (2 hours of 6 dB crest factor pink noise, 50–20,000 Hz, AES method) Recommended Amplifier Power | 800 watts continuous 1000 watts continuous 1600 watts continuous maximum | |
Sensitivity 2 V at 1 meter, half space | 99.5 dB | |
Transducers | Two 18-inch (457 mm) 500 watt high-efficiency subwoofer transducers featuring 4-inch (100 mm) copper voice coils on Kapton formers | |
Recommended Processing | LF boost Freq. = 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 symmetrical port design, tuned to 25 Hz, constructed of MDF and heavily braced. Features vandal resistant woofer mounting bolts. | |
Dimensions (HWD) inches | 48 × 30 × 24 | |
Dimensions (HWD) mm | 762 x 1220 x 610 | |
Weight | 205 lb (93 kg) |
1All frequency ranges specified refer to measured response (half space, 2 pi).
2Calculated SPL at 1 m, (half space, 2 pi), speaker operating at rated continuous power with pink noise within specified frequency range.
3Maximum input power tested in accordance with IEC 268-5 recommendations, 50 Hz–20 kHz band limiting, 6 dB signal crest factor.
Specifications are subject to change without notice.