Vented Specialist

Beyma BMA15QLEX1600FE

Best box: 17.4 L bass reflex tuned to 70.6 Hz · F3 74.2 Hz

Predicted SPL response of the Beyma BMA15QLEX1600FE in the recommended 17.4 L bass reflex box versus the alternative — open it in the simulator Open and tweak this box live ↗

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⚠️ Engineering Notice for Builders

  • The textbook alignment (17.4 L at 56.5 Hz) would need a 155.2 cm port; the recommendation is retuned to 17.4 L at 70.6 Hz so the port can be built.
  • Port length (94.3 cm) exceeds a straight internal run; use an elbow bend, slotted vent or 3D folded duct to fit the enclosure.

Recommended Bass Reflex (Vented)

PORT NEEDS ELBOW / 3D
Net Box Volume (Vb) 17.4 Liters
Tuning Frequency (Fb) 70.6 Hz
F3 (-3 dB Cutoff) 74.2 Hz
F6 / F10 Extension 65.8 Hz / 57.3 Hz
Port Inner Diameter Ø 20.0 cm
Port Physical Length 94.3 cm
First Pipe Resonance 182.0 Hz
Estimated MOL @ F3 123.6 dB SPL
⚠️ Port feasibility: a straight 20.0 cm tube needs 94.3 cm of internal length. Use an elbow bend, a slotted vent or a 3D folded duct.
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Recommended Sealed (Acoustic Suspension)

MAX TRANSIENT DAMPING
Net Box Volume (Vb) 9.9 Liters
System Q (Qtc) 0.707 (Butterworth)
System Resonance (Fc) 108.3 Hz
F3 (-3 dB Cutoff) 104.9 Hz
F6 / F10 Extension 79.9 Hz / 60.4 Hz
Air Spring Linearity High (Zero port compression)
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Thiele/Small Parameters

Resonance (Fs) 33.0 Hz
Total Q (Qts) 0.21
Electrical Q (Qes) 0.217
Mechanical Q (Qms) 6.3
Equivalent Volume (Vas) 102.0 Liters
Diaphragm Area (Sd) 880.0 cm²
DC Resistance (Re) 5.3 Ω
Efficiency Bandwidth Product (EBP) 151.9
Linear Excursion (Xmax) 13.0 mm
Thermal Power (Pe) 1600.0 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 Beyma BMA15QLEX1600FE?

Load Forge's calculated alignment puts Beyma BMA15QLEX1600FE in a 17.4 liter vented enclosure tuned to 70.6 Hz, reaching an F3 cutoff of approximately 74.2 Hz.

Can Beyma BMA15QLEX1600FE be used in a sealed box?

Yes. In a sealed (acoustic suspension) enclosure of 9.9 liters with a Qtc of 0.707 (Butterworth), the system exhibits an F3 of 104.9 Hz.

What port dimensions should be used for Beyma BMA15QLEX1600FE to avoid port chuffing?

Sized from cone displacement (Sd × Xmax), a minimum port diameter of 20.0 cm with a length of 94.3 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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Beyma BMA15QLEX1600FE Enclosure Card
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