Bold North Audio BWF-8001 8" 4 Ohm Subwoofer (82132)

SKU: BWF-8001

Canadian Dollar Price:
Sale price$136.97
In stock (11 units)


This 8” woofer/subwoofer creates clear and natural low-end sound for your home audio system, including bookshelf two-way systems or high-end home theaters. With an EBP of 94, this woofer is ideal for ported systems. This unit is driven by a heavy-duty dual ferrite magnet and an overhung 4-layer coil. The cone is a Klippel optimized Abacá fiber cone with rubber surround. The stamped steel basket has additional depth below the spider for extra mechanical travel. Double lug, quick connect terminals for series or parallel wiring.

  • High excursion woofer/subwoofer
  • 8" (203 mm) stamped-steel basket - deep draw below spider
  • 75 watts, 4 ohms, 87 dB SPL
  • 1.5" voice coil, copper wire on aluminum former
  • Dual ferrite magnet for high Bg and X-mech
  • Highly damped abaca fiber cone with half roll rubber edge

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-8001
Speaker Type Subwoofer
Size, Nominal (inch & mm) 8"
Shape of Speaker Round
Application High-End Audio and Home Theater, Indoor, Pro Sound
RoHS Compliant Yes
Rated Impedance (Ω) 4
DC Resistance (Re) (Ω) 3.9
Rated Power IEC268-5 (W) 75 Watts
Program Power (W) 150
Frequency Range (Hz) 25 - 1,000
Sensitivity (dB SPL) ¹ 87
Resonant Frequency (Fs) (Hz) 33
Nominal Impedance (Z) (Ω) 4
Voice Coil Inductance (Le) (mH) 1.25
Mechanical Q Factor (Qms) 5.7
Electrical Q Factor (Qes) 0.35
Total Q Factor (Qts) 0.32
Moving Mass (Mms) (gm) 65.0
Suspension Compliance (Cms) (mm/N) 0.34
Mechanical Resistance (Rms) (kg/s) 2.30
Surface Area of Diaphragm (Sd) (cm²) 227.0
Compliance Equivalent Volume (Vas) (L) 25.0
Motor Force Factor (BL) (T•M) 12.5
Efficiency (η₀) (%) 0.26
Efficiency Bandwidth Product (EBP) (Fs/Qes) 94.2
Basket Type Stamped steel
Terminal Size (mm) 7.5 x 5.1
Voice Coil Diameter (mm) 38.7
Voice Coil Wire Material Copper
Voice Coil Former Material Aluminum
Magnet Material Ferrite
Magnet Weight (gm) 567
Cone Body Material Abaca fiber
Cone Surround Material Rubber
Spider Material Conex
Dust Cap Material Paper composite
Displacement Limit Due to Force Factor Variation (mm) 7.81
Displacement Limit Due to Compliance Variation (mm) 6.70

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