• Số 48 Đặng Thùy Trâm, P. Dịch Vọng Hậu, Q. Cầu Giấy, TP Hà Nội
  • info@bachvietpro.vn
  • 0913.336.993

SB-15121 Subwoofer

Liên hệ

Features: 21" Cinema Subwoofer

  • 1500 W, 21" 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.



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


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)


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


Barrier strip screw terminals accept up to #10 AWG stranded wire. Four terminals; two inputs and two parrallel outputs.


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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