10 Inch (275 mm) Cast Frame Subwoofer

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The 82136, 10” premium subwoofer creates great low frequency output for professional and high-end audio applications. This product uses a dual ferrite magnet for long throw, sports a low resonance frequency for better bass performance, and operates at a 150 watt rated power handling. These characteristics, along with a hemp-fiber cone with a durable but light weight foam surround plus easy connecting gold plated spring terminals, enhance professional systems looking for a sub that is efficient, reliable, and consistent.
  • Low 25 Hz resonant frequency
  • 10", 12 spoke cast aluminum basket
  • 150 watts, 88 dB SPL
  • 2" four-layer voice coil, 5 ohm impedance
  • Dual ferrite magnet allowing for long throw
  • Hemp-fiber cone, foam surround
  • 12.6 mm linear excursion (BL)

Bold North Audio products are the most accurate, engineered audio transducers available. Each design requires Klippel vibrational test analyses to verify the key parts of optimal audio performance. While we rely heavily on objective science to lead us, we understand that most of all speakers need to tell the musical truth. Our engineers, musicians, and recording studio veterans are the final judges of when a design is worthy of the Bold North Audio brand.

All Bold North Audio products are assembled in Minnesota, with parts sourced from around the world to produce the highest combination of performance, consistency, and customer value.

More Information
Model # BWF-1002
Speaker Type Subwoofer
Size, Nominal (inch & mm) 10" (250 mm)
Shape of Speaker Round
Application High-End Audio and Home Theater, Home Audio
RoHS Compliant Yes
Rated Impedance (Ω) 5
DC Resistance (Re) (Ω) 4.1
Rated Power IEC268-5 (W) 150 Watts
Continuous Power (W) 150
Program Power (W) 300
Frequency Range (Hz) 20 - 200
Sensitivity (dB SPL) ¹ 88
Resonant Frequency (Fs) (Hz) +/- 15% 25
Nominal Impedance (Z) (Ω) 5
Voice Coil Inductance (Le) (mH) 2.52
Mechanical Q Factor (Qms) 5.6
Electrical Q Factor (Qes) 0.29
Total Q Factor (Qts) 0.27
Moving Mass (Mms) (gm) 126
Suspension Compliance (Cms) (mm/N) 0.32
Mechanical Resistance (Rms) (kg/s) 3.6
Surface Area of Diaphragm (Sd) (cm²) 346
Compliance Equivalent Volume (Vas) (L) 46
Motor Force Factor (BL) (T•M) 16.9
Efficiency (η₀) (%) 0.20
Efficiency Bandwidth Product (EBP) (Fs/Qes) 86.2
Basket Type Cast aluminum
Terminal Size (mm) Knurled push style spring connectors
Voice Coil Diameter (mm) 51
Voice Coil Wire Material Round copper wire
Voice Coil Former Material Aluminum
Magnet Material Ferrite
Magnet Weight (g) 1,077
Cone Body Material Hemp
Cone Surround Material Foam
Spider Material Polycotton
Dust Cap Material Paper composite
Displacement Limit Due to Force Factor Variation (mm) 12.6
Displacement Limit Due to Compliance Variation (mm) 5.3