Frequency range extends to below 25 Hz without the need for B6 EQ filters
DCP, DCM and SF-3 signal processors optionally available
Read the SB-15121 application note: covers the target applications of the SB-15121, as well as advantages and comparisons to other cinema subwoofer designs.
SPECIFICATIONS
SB-15121
Frequency Range 1 (-6 dB, half space) (-10 dB, half space)
23.8 Hz - 250 Hz 21.5 Hz - 250 Hz
Maximum Output 2 Calculated Peak at rated power Calculated Continuous
137 dB SPL 131 dB SPL
Impedance
4 ohms nominal
Maximum Input Power 3 100 hours of 6 dB crest factor pink noise, 25 Hz–250 Hz 2 hours of 6 dB crest factor pink noise, 25 Hz–250 Hz, AES method
1500 W continuous
2500 W continuous
Recommended Amplifier Power
3400 W continuous maximum / 1200 W continuous minimum
Sensitivity 2 V at 1 meter, half space
99 dB, 40 Hz–100 Hz
Nominal Coverage
Omnidirectional (80 Hz)
Transducers
One 21" (533 mm) high efficiency subwoofer transducer featuring a vented 6" (153 mm) copper voice coil on a fiberglass former. High excursion/low distortion design, with extremely high power handling and low thermal and port compression. Neodymium magnet to provide a very high force factor and linear excursion.
Recommended Processing
HPF at 20 Hz, minimum 12 dB/octave slope
Connectors
Barrier strip screw terminals accept up to #10 AWG stranded wire. Four terminals; two inputs and two parrallel outputs.
Enclosure
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.
Features: 21" Cinema Subwoofer
Read the SB-15121 application note: covers the target applications of the SB-15121, as well as advantages and comparisons to other cinema subwoofer designs.
SPECIFICATIONS
SB-15121
Frequency Range 1
(-6 dB, half space)
(-10 dB, half space)
23.8 Hz - 250 Hz
21.5 Hz - 250 Hz
Maximum Output 2
Calculated Peak at rated power
Calculated Continuous
137 dB SPL
131 dB SPL
Impedance
4 ohms nominal
Maximum Input Power 3
100 hours of 6 dB crest factor pink noise, 25 Hz–250 Hz
2 hours of 6 dB crest factor pink noise, 25 Hz–250 Hz, AES method
1500 W continuous
2500 W continuous
Recommended Amplifier Power
3400 W continuous maximum / 1200 W continuous minimum
Sensitivity 2 V at 1 meter, half space
99 dB, 40 Hz–100 Hz
Nominal Coverage
Omnidirectional (80 Hz)
Transducers
One 21" (533 mm) high efficiency subwoofer transducer featuring a vented 6" (153 mm) copper voice coil on a fiberglass former. High excursion/low distortion design, with extremely high power handling and low thermal and port compression. Neodymium magnet to provide a very high force factor and linear excursion.
Recommended Processing
HPF at 20 Hz, minimum 12 dB/octave slope
Connectors
Barrier strip screw terminals accept up to #10 AWG stranded wire. Four terminals; two inputs and two parrallel outputs.
Enclosure
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.
Dimensions (HWD) inches
48.8 × 30 × 24
Dimensions (HWD) mm
1238 x 762 x 610
Net Weight
231 lb (105 kg)
Shipping Weight
257 lb (114 kg)
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