Reflex Optimized
Beyma 12CXA400Nd
Complete Thiele/Small parameters, optimized ported (bass reflex) and sealed enclosure designs, F3/F6/F10 cutoffs, and vent turbulence analysis calculated by Load Forge.
Recommended Bass Reflex (Vented)
OPTIMIZED EXTENSION| Net Box Volume (Vb) | 24.8 Liters |
| Tuning Frequency (Fb) | 65.8 Hz |
| F3 (-3 dB Cutoff) | 70.7 Hz |
| F6 / F10 Extension | 61.5 Hz / 53.2 Hz |
| Port Inner Diameter | Ø 12.5 cm |
| Port Physical Length | 25.3 cm |
| First Pipe Resonance | 679.0 Hz |
| Estimated MOL @ F3 | 121.4 dB SPL |
Recommended Sealed (Acoustic Suspension)
MAX TRANSIENT DAMPING| Net Box Volume (Vb) | 12.6 Liters |
| System Q (Qtc) | 0.707 (Butterworth Q=0.707) |
| System Resonance (Fc) | 121.2 Hz |
| F3 (-3 dB Cutoff) | 113.8 Hz |
| F6 / F10 Extension | 86.8 Hz / 65.5 Hz |
| Air Spring Linearity | High (Zero port compression) |
Verified Thiele/Small Parameters
| Resonance (Fs) | 45.0 Hz |
| Total Q (Qts) | 0.25 |
| Electrical Q (Qes) | 0.259 |
| Mechanical Q (Qms) | 7.1 |
| Equivalent Volume (Vas) | 88.5 Liters |
| Diaphragm Area (Sd) | 550.0 cm² |
| DC Resistance (Re) | 6.6 Ω |
| Efficiency Bandwidth Product (EBP) | 173.7 |
| Linear Excursion (Xmax) | 6.0 mm |
| Thermal Power (Pe) | 800.0 W |
| Nominal Diameter | 12.0" |
| Catalog Source | Manufacturer Official Datasheet |
Shareable Acoustic Card for Forums & Social Media
Embed this verified design card on DIYAudio, AVSForum, Reddit, or Facebook. Includes verified F3, MOL, and box parameters.
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