Volt BM251.3
Best box: 32.4 L bass reflex tuned to 59.4 Hz · F3 57.7 Hz
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Comparable 10.0" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the Volt BM251.3 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) | 32.4 Liters |
| Tuning Frequency (Fb) | 59.4 Hz |
| F3 (-3 dB Cutoff) | 57.7 Hz |
| F6 / F10 Extension | 51.5 Hz / 45.3 Hz |
| Port Inner Diameter | Ø 7.5 cm |
| Port Physical Length | 6.2 cm |
| First Pipe Resonance | 2765.0 Hz |
| Estimated MOL @ F3 | 123.0 dB SPL |
Recommended Sealed (Acoustic Suspension)
MAX TRANSIENT DAMPING| Net Box Volume (Vb) | 14.3 Liters |
| System Q (Qtc) | 0.707 (Butterworth) |
| System Resonance (Fc) | 105.9 Hz |
| F3 (-3 dB Cutoff) | 104.7 Hz |
| F6 / F10 Extension | 79.2 Hz / 59.6 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 55.0 Hz |
| Total Q (Qts) | 0.35 |
| Electrical Q (Qes) | 3.482 |
| Mechanical Q (Qms) | 0.39 |
| Equivalent Volume (Vas) | 44.0 Liters |
| Diaphragm Area (Sd) | 336.0 cm² |
| DC Resistance (Re) | 5.2 Ω |
| Efficiency Bandwidth Product (EBP) | 15.8 |
| Linear Excursion (Xmax) | 5.0 mm |
| Thermal Power (Pe) | N/A W |
| Nominal Diameter | 10.0" |
| Catalog Source | Load Forge catalog (manufacturer datasheets and retailer listings) |
Frequently Asked Questions
What is the recommended ported (bass reflex) box volume for Volt BM251.3?
Load Forge's calculated alignment puts Volt BM251.3 in a 32.4 liter vented enclosure tuned to 59.4 Hz, reaching an F3 cutoff of approximately 57.7 Hz.
Can Volt BM251.3 be used in a sealed box?
Yes. In a sealed (acoustic suspension) enclosure of 14.3 liters with a Qtc of 0.707 (Butterworth), the system exhibits an F3 of 104.7 Hz.
What port dimensions should be used for Volt BM251.3 to avoid port chuffing?
Sized from cone displacement (Sd × Xmax), a minimum port diameter of 7.5 cm with a length of 6.2 cm is suggested; check the port air velocity at your drive level in the Load Forge Studio.
Shareable Acoustic Card for Forums & Social Media
Embed this design card on DIYAudio, AVSForum, Reddit, or Facebook. It shows the calculated F3, MOL (when the power rating is published) and box parameters.
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