Vented Specialist

Oberton 10NMB300

Best box: 3.9 L bass reflex tuned to 110.6 Hz · F3 124.9 Hz

Predicted SPL response of the Oberton 10NMB300 in the recommended 3.9 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 (3.9 L at 105.3 Hz) would need a 47.3 cm port; the recommendation is retuned to 3.9 L at 110.6 Hz so the port can be built.

Recommended Bass Reflex (Vented)

PORT BUILDABLE
Net Box Volume (Vb) 3.9 Liters
Tuning Frequency (Fb) 110.6 Hz
F3 (-3 dB Cutoff) 124.9 Hz
F6 / F10 Extension 107.5 Hz / 92.0 Hz
Port Inner Diameter Ø 10.0 cm
Port Physical Length 42.2 cm
First Pipe Resonance 408.0 Hz
Estimated MOL @ F3 117.7 dB SPL
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Recommended Sealed (Acoustic Suspension)

MAX TRANSIENT DAMPING
Net Box Volume (Vb) 2.2 Liters
System Q (Qtc) 0.707 (Butterworth)
System Resonance (Fc) 200.4 Hz
F3 (-3 dB Cutoff) 171.5 Hz
F6 / F10 Extension 134.9 Hz / 103.3 Hz
Air Spring Linearity High (Zero port compression)
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Thiele/Small Parameters

Resonance (Fs) 62.1 Hz
Total Q (Qts) 0.212
Electrical Q (Qes) 0.216
Mechanical Q (Qms) 10.61
Equivalent Volume (Vas) 22.1 Liters
Diaphragm Area (Sd) 317.3 cm²
DC Resistance (Re) 5.6 Ω
Efficiency Bandwidth Product (EBP) 287.0
Linear Excursion (Xmax) 5.2 mm
Thermal Power (Pe) 400.0 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 Oberton 10NMB300?

Load Forge's calculated alignment puts Oberton 10NMB300 in a 3.9 liter vented enclosure tuned to 110.6 Hz, reaching an F3 cutoff of approximately 124.9 Hz.

Can Oberton 10NMB300 be used in a sealed box?

Yes. In a sealed (acoustic suspension) enclosure of 2.2 liters with a Qtc of 0.707 (Butterworth), the system exhibits an F3 of 171.5 Hz.

What port dimensions should be used for Oberton 10NMB300 to avoid port chuffing?

Sized from cone displacement (Sd × Xmax), a minimum port diameter of 10.0 cm with a length of 42.2 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.

Oberton 10NMB300 Enclosure Card
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