Features
- 1500 W, 21-inch transducer
- 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
|
| 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 continuous2500 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-inch (533 mm) high efficiency subwoofer transducer featuring a vented 6-inch (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) |
1All frequency ranges specified refer to measured half-space response (2 pi).
2Calculated SPL at 1m, (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.
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