B&C Speakers B&C 15SW115 15" Professional Neodymium Subwoofer 8 Ohm
Best box: 27.6 L bass reflex tuned to 77.0 Hz · F3 76.4 Hz
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Comparable 15.0" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the B&C Speakers B&C 15SW115 15" Professional Neodymium Subwoofer 8 Ohm does not fit your target box volume or tuning. Each entry links to its full enclosure design and Thiele/Small parameters.
⚠️ Engineering Notice for Builders
- The textbook alignment (27.6 L at 53.1 Hz) would need a 106.7 cm port; the recommendation is retuned to 27.6 L at 77.0 Hz so the port can be built.
Recommended Bass Reflex (Vented)
PORT BUILDABLE| Net Box Volume (Vb) | 27.6 Liters |
| Tuning Frequency (Fb) | 77.0 Hz |
| F3 (-3 dB Cutoff) | 76.4 Hz |
| F6 / F10 Extension | 69.4 Hz / 61.6 Hz |
| Port Inner Diameter | Ø 20.3 cm |
| Port Physical Length | 44.8 cm |
| First Pipe Resonance | 384.0 Hz |
| Estimated MOL @ F3 | 129.2 dB SPL |
Recommended Sealed (Acoustic Suspension)
MAX TRANSIENT DAMPING| Net Box Volume (Vb) | 14.4 Liters |
| System Q (Qtc) | 0.707 (Butterworth) |
| System Resonance (Fc) | 100.0 Hz |
| F3 (-3 dB Cutoff) | 100.3 Hz |
| F6 / F10 Extension | 75.1 Hz / 56.1 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 35.0 Hz |
| Total Q (Qts) | 0.24 |
| Electrical Q (Qes) | 0.254 |
| Mechanical Q (Qms) | 4.4 |
| Equivalent Volume (Vas) | 110.4 Liters |
| Diaphragm Area (Sd) | 855.0 cm² |
| DC Resistance (Re) | 5.0 Ω |
| Efficiency Bandwidth Product (EBP) | 137.9 |
| Linear Excursion (Xmax) | 13.5 mm |
| Thermal Power (Pe) | 3400.0 W |
| Nominal Diameter | 15.0" |
| Catalog Source | Load Forge catalog (manufacturer datasheets and retailer listings) |
Frequently Asked Questions
What is the recommended ported (bass reflex) box volume for B&C Speakers B&C 15SW115 15" Professional Neodymium Subwoofer 8 Ohm?
Load Forge's calculated alignment puts B&C Speakers B&C 15SW115 15" Professional Neodymium Subwoofer 8 Ohm in a 27.6 liter vented enclosure tuned to 77.0 Hz, reaching an F3 cutoff of approximately 76.4 Hz.
Can B&C Speakers B&C 15SW115 15" Professional Neodymium Subwoofer 8 Ohm be used in a sealed box?
Yes. In a sealed (acoustic suspension) enclosure of 14.4 liters with a Qtc of 0.707 (Butterworth), the system exhibits an F3 of 100.3 Hz.
What port dimensions should be used for B&C Speakers B&C 15SW115 15" Professional Neodymium Subwoofer 8 Ohm to avoid port chuffing?
Sized from cone displacement (Sd × Xmax), a minimum port diameter of 20.3 cm with a length of 44.8 cm is suggested; check the port air velocity at your drive level in the Load Forge Studio.
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Not sure if B&C 15SW115 15" Professional Neodymium Subwoofer 8 Ohm fits your physical space?
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