SB-15121 subwoofer offers highest performance available for cinema subwoofer applications. It is designed for use in premiere cinemas and post-production applications where the ultimate in performance is required. The massive 21-inch low-frequency transducer features 6-inch diameter voice coil in a vented, neodymium magnet structure that is designed to dissipate extreme amounts of heat and allow for excursion that is double that of typical 18-inch transducers. This ensures cool operation, even at high power levels, increases driver lifespan and decreases power compression at high drive levels. The large, ported enclosure ensures response to the lowest audible frequency for bass that not only hear but also feel. The enclosure is constructed of high quality, heavily braced MDF Panels. 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 around the transducer, 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.
1500W, 21-inch transducer
Frequency range extends to below 25Hz without the need for B6 EQ filters
DCP, DCM and SF-3 signal processors optionally available
RoHS Compliant
Spec Sheet available - Yes
Depth:
24 in
Height:
48.80 in
Product Weight:
231 lbs
Shipping Weight:
257 lbs
Width:
30 in
Impedance:
4 ohm
Sensitivity:
99 dB
Maximum SPL (Sound Pressure Level):
131 dB
Regulatory Compliance:
RoHS
Frequency Range:
23.8 to 250 Hz (-6dB, half space)
Calculated maximum peak at rated power:
137 dB
Maximum RMS input power:
1500 W (100 hours of 6dB crest factor pink noise, 25 to 250Hz)
Recommended RMS amplifier power:
3400 W (maximum into 8 ohms)
Maximum output calculated peak at rated power:
137 dB
Recommended processing:
HPF at 20Hz, minimum 12dB/octave slope
Enclosure:
vented enclosure with symmetrical port design, tuned to 25Hz, constructed of medium density fibre-board and heavily braced
Connectors:
barrier strip screw terminals accept up to #10AWG stranded wire
Transducers:
one 21-inch high efficiency subwoofer transducer featuring vented 6-inch (153mm) copper voice coil on fiberglass former