B&C Speakers 15CLX64
Best box: 181.6 L bass reflex tuned to 31.4 Hz · F3 43.8 Hz
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Comparable 15.0" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the B&C Speakers 15CLX64 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
- Large enclosure volume (181.6 L) requires extensive internal matrix bracing to prevent panel resonance.
Recommended Bass Reflex (Vented)
PORT BUILDABLE| Net Box Volume (Vb) | 181.6 Liters |
| Tuning Frequency (Fb) | 31.4 Hz |
| F3 (-3 dB Cutoff) | 43.8 Hz |
| F6 / F10 Extension | 36.5 Hz / 28.4 Hz |
| Port Inner Diameter | Ø 10.0 cm |
| Port Physical Length | 6.0 cm |
| First Pipe Resonance | 2867.0 Hz |
| Estimated MOL @ F3 | 116.3 dB SPL |
Sealed (Acoustic Suspension) — compromise
SUITS INFINITE / OPEN BAFFLEWith Qts 0.75 a Butterworth (Qtc 0.707) box would be many times Vas. A box equal to Vas reaches Qtc 1.061; for a flat response this driver is better used on an infinite (IB) or open baffle.
| Net Box Volume (Vb) | 227.0 Liters |
| System Q (Qtc) | 1.061 (above Butterworth: Qtc cannot fall below Qts (0.75)) |
| System Resonance (Fc) | 52.3 Hz |
| F3 (-3 dB Cutoff) | 41.8 Hz |
| F6 / F10 Extension | 34.6 Hz / 27.8 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 37.0 Hz |
| Total Q (Qts) | 0.75 |
| Electrical Q (Qes) | 0.815 |
| Mechanical Q (Qms) | 9.4 |
| Equivalent Volume (Vas) | 227.0 Liters |
| Diaphragm Area (Sd) | 855.0 cm² |
| DC Resistance (Re) | 5.5 Ω |
| Efficiency Bandwidth Product (EBP) | 45.4 |
| Linear Excursion (Xmax) | 5.3 mm |
| Thermal Power (Pe) | 250.0 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 15CLX64?
Load Forge's calculated alignment puts B&C Speakers 15CLX64 in a 181.6 liter vented enclosure tuned to 31.4 Hz, reaching an F3 cutoff of approximately 43.8 Hz.
Can B&C Speakers 15CLX64 be used in a sealed box?
Yes. In a sealed (acoustic suspension) enclosure of 227.0 liters with a Qtc of 1.061 (above Butterworth: Qtc cannot fall below Qts (0.75)), the system exhibits an F3 of 41.8 Hz.
What port dimensions should be used for B&C Speakers 15CLX64 to avoid port chuffing?
Sized from cone displacement (Sd × Xmax), a minimum port diameter of 10.0 cm with a length of 6.0 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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