Vented Specialist

Eminence EMILEGEM12N

Best box: 69.4 L bass reflex tuned to 56.6 Hz · F3 55.2 Hz

Predicted SPL response of the Eminence EMILEGEM12N in the recommended 69.4 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

  • Limited linear excursion (Xmax: 2.22 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) 69.4 Liters
Tuning Frequency (Fb) 56.6 Hz
F3 (-3 dB Cutoff) 55.2 Hz
F6 / F10 Extension 49.3 Hz / 43.3 Hz
Port Inner Diameter Ø 10.0 cm
Port Physical Length 3.4 cm
First Pipe Resonance 5001.0 Hz
Estimated MOL @ F3 116.6 dB SPL
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Recommended Sealed (Acoustic Suspension)

MAX TRANSIENT DAMPING
Net Box Volume (Vb) 30.8 Liters
System Q (Qtc) 0.707 (Butterworth)
System Resonance (Fc) 98.3 Hz
F3 (-3 dB Cutoff) 97.6 Hz
F6 / F10 Extension 74.0 Hz / 55.9 Hz
Air Spring Linearity High (Zero port compression)
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Thiele/Small Parameters

Resonance (Fs) 51.0 Hz
Total Q (Qts) 0.34
Electrical Q (Qes) 0.356
Mechanical Q (Qms) 7.74
Equivalent Volume (Vas) 102.3 Liters
Diaphragm Area (Sd) 532.4 cm²
DC Resistance (Re) 7.38 Ω
Efficiency Bandwidth Product (EBP) 143.4
Linear Excursion (Xmax) 2.2 mm
Thermal Power (Pe) 200.0 W
Nominal Diameter 12.0"
Catalog Source Load Forge catalog (manufacturer datasheets and retailer listings)

Frequently Asked Questions

What is the recommended ported (bass reflex) box volume for Eminence EMILEGEM12N?

Load Forge's calculated alignment puts Eminence EMILEGEM12N in a 69.4 liter vented enclosure tuned to 56.6 Hz, reaching an F3 cutoff of approximately 55.2 Hz.

Can Eminence EMILEGEM12N be used in a sealed box?

Yes. In a sealed (acoustic suspension) enclosure of 30.8 liters with a Qtc of 0.707 (Butterworth), the system exhibits an F3 of 97.6 Hz.

What port dimensions should be used for Eminence EMILEGEM12N to avoid port chuffing?

Sized from cone displacement (Sd × Xmax), a minimum port diameter of 10.0 cm with a length of 3.4 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.

Eminence EMILEGEM12N Enclosure Card
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