B&C Speakers B&C 18PS76 18" Woofer
Best box: 71.4 L bass reflex tuned to 53.2 Hz · F3 59.7 Hz
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Comparable 18.0" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the B&C Speakers B&C 18PS76 18" Woofer does not fit your target box volume or tuning. Each entry links to its full enclosure design and Thiele/Small parameters.
Recommended Bass Reflex (Vented)
PORT BUILDABLE| Net Box Volume (Vb) | 71.4 Liters |
| Tuning Frequency (Fb) | 53.2 Hz |
| F3 (-3 dB Cutoff) | 59.7 Hz |
| F6 / F10 Extension | 51.2 Hz / 43.7 Hz |
| Port Inner Diameter | Ø 15.0 cm |
| Port Physical Length | 15.5 cm |
| First Pipe Resonance | 1111.0 Hz |
| Estimated MOL @ F3 | 125.4 dB SPL |
Recommended Sealed (Acoustic Suspension)
MAX TRANSIENT DAMPING| Net Box Volume (Vb) | 34.8 Liters |
| System Q (Qtc) | 0.707 (Butterworth) |
| System Resonance (Fc) | 95.5 Hz |
| F3 (-3 dB Cutoff) | 96.0 Hz |
| F6 / F10 Extension | 74.3 Hz / 56.9 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 39.0 Hz |
| Total Q (Qts) | 0.27 |
| Electrical Q (Qes) | 0.283 |
| Mechanical Q (Qms) | 6.1 |
| Equivalent Volume (Vas) | 203.9 Liters |
| Diaphragm Area (Sd) | 1210.0 cm² |
| DC Resistance (Re) | 5.3 Ω |
| Efficiency Bandwidth Product (EBP) | 138.1 |
| Linear Excursion (Xmax) | 7.0 mm |
| Thermal Power (Pe) | 1200.0 W |
| Nominal Diameter | 18.0" |
| 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 18PS76 18" Woofer?
Load Forge's calculated alignment puts B&C Speakers B&C 18PS76 18" Woofer in a 71.4 liter vented enclosure tuned to 53.2 Hz, reaching an F3 cutoff of approximately 59.7 Hz.
Can B&C Speakers B&C 18PS76 18" Woofer be used in a sealed box?
Yes. In a sealed (acoustic suspension) enclosure of 34.8 liters with a Qtc of 0.707 (Butterworth), the system exhibits an F3 of 96.0 Hz.
What port dimensions should be used for B&C Speakers B&C 18PS76 18" Woofer to avoid port chuffing?
Sized from cone displacement (Sd × Xmax), a minimum port diameter of 15.0 cm with a length of 15.5 cm is suggested; check the port air velocity at your drive level in the Load Forge Studio.
Shareable Acoustic Card for Forums & Social Media
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