The QSC SB-7218 is a high-output dual-18-inch cinema subwoofer for demanding low-frequency effects (LFE) and screen-channel bass in large auditoriums. It uses two 18-inch, 700-watt high-efficiency transducers with 4-inch copper coils on Kapton formers, presents a 4-ohm nominal load, and offers 101 dB sensitivity with response from about 22 Hz. It is a passive loudspeaker driven by external QSC cinema amplification/DSP. This is a standalone subwoofer, not an accessory.
Key Features
- High-output dual 18-inch cinema subwoofer
- Two 700 W, 18-inch transducers with 4-inch copper coils
- 4-ohm nominal load; 101 dB sensitivity
- Low-frequency extension to about 22 Hz
- Passive; driven by external cinema amplification/DSP