Vented Specialist

HiVi M5N-B 5" Damped Aluminum/Magnesium Cone Woofer

Best box: 8.1 L bass reflex tuned to 54.0 Hz · F3 52.6 Hz

Predicted SPL response of the HiVi M5N-B 5" Damped Aluminum/Magnesium Cone Woofer in the recommended 8.1 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

  • Limited linear excursion (Xmax: 2.7 mm); set a high-pass subsonic filter at 25–30 Hz when driven with high power.

Recommended Bass Reflex (Vented)

PORT BUILDABLE
Net Box Volume (Vb) 8.1 Liters
Tuning Frequency (Fb) 54.0 Hz
F3 (-3 dB Cutoff) 52.6 Hz
F6 / F10 Extension 46.9 Hz / 41.2 Hz
Port Inner Diameter Ø 5.0 cm
Port Physical Length 21.3 cm
First Pipe Resonance 806.0 Hz
Estimated MOL @ F3 99.1 dB SPL
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Recommended Sealed (Acoustic Suspension)

MAX TRANSIENT DAMPING
Net Box Volume (Vb) 3.6 Liters
System Q (Qtc) 0.707 (Butterworth)
System Resonance (Fc) 99.1 Hz
F3 (-3 dB Cutoff) 94.0 Hz
F6 / F10 Extension 71.2 Hz / 53.7 Hz
Air Spring Linearity High (Zero port compression)
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Thiele/Small Parameters

Resonance (Fs) 50.0 Hz
Total Q (Qts) 0.35
Electrical Q (Qes) 0.37
Mechanical Q (Qms) 6.51
Equivalent Volume (Vas) 11.0 Liters
Diaphragm Area (Sd) 87.0 cm²
DC Resistance (Re) 6.5 Ω
Efficiency Bandwidth Product (EBP) 135.2
Linear Excursion (Xmax) 2.7 mm
Thermal Power (Pe) 35.0 W
Nominal Diameter 5.0"
Catalog Source Load Forge catalog (manufacturer datasheets and retailer listings)

Frequently Asked Questions

What is the recommended ported (bass reflex) box volume for HiVi M5N-B 5" Damped Aluminum/Magnesium Cone Woofer?

Load Forge's calculated alignment puts HiVi M5N-B 5" Damped Aluminum/Magnesium Cone Woofer in a 8.1 liter vented enclosure tuned to 54.0 Hz, reaching an F3 cutoff of approximately 52.6 Hz.

Can HiVi M5N-B 5" Damped Aluminum/Magnesium Cone Woofer be used in a sealed box?

Yes. In a sealed (acoustic suspension) enclosure of 3.6 liters with a Qtc of 0.707 (Butterworth), the system exhibits an F3 of 94.0 Hz.

What port dimensions should be used for HiVi M5N-B 5" Damped Aluminum/Magnesium Cone Woofer to avoid port chuffing?

Sized from cone displacement (Sd × Xmax), a minimum port diameter of 5.0 cm with a length of 21.3 cm is suggested; check the port air velocity at your drive level in the Load Forge Studio.

Shareable Acoustic Card for Forums & Social Media

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.

HiVi M5N-B 5" Damped Aluminum/Magnesium Cone Woofer Enclosure Card
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