• Long-excursion, vented-spider 15” in medium tuned cabinet
  • 15mm Birch with clever bracing brings lightweight yet rigid cabinet construction
  • Double baffle board with flush mount transducer
  • SIS pre-wired for very high damping and further reduced distortion (with ALC)
  • Dedicated protection in combination with SDP modules (with ALC)
  • Durotect™ scratch-resistant coating
  • Stand mount adapter


QB363 The BF151 is a front-loaded subwoofer system, for both permanent and portable applications. Featuring a single 15” long-excursion high-power woofer (with vented double-spider frame), the BF151 delivers high quality, tight and accurate bass response. 

The SIS pre-wiring ensures complete cable/ connector compensation between the BF151 and ALC. Typical applications for the BF151 include bass extension of main sound systems, used in multiples depending on the application and low frequency requirements.

The higher tuning makes the BF151 an ideal highpower punch-bass system for pop/rock/disco, in combination with a V-series top cabinet.

For full system performance, we recommend using the BF151 in combination with an ALC4 amplifier/ controller. Driven by the ALC, the BF151 delivers maximum sound quality and output power with dedicated and inaudible (power and excursion!) protection (SDP circuit).
Dimensional Drawing »

Technical Specifications

Frequency Response
+/- 3 dB 42 Hz – 300 Hz
+/- 10 dB 38 Hz –
Sensitivity (SPL 1W/M) 97 dB
Nominal Impedance 4 ohms
Maximum RMS power 1000 W
Maximum peak power 7000 W
SPL program/peak (nom.) 127dB / 135dB
Dispersion H x V (array) omni

Physical Specifications

System subwoofer, front loaded
Drivers LF 1 x AW15.4 15″  vented
Cross-over frequency 44 Hz recommended
Connectors 2 x Speakon NL4 input / link
Physical dimensions mm
Height 460
Width 596
Depth 500
Weight (approx.) 38kg
Warranty 6 years limited


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