Passive Radiator / Folded Port

Skar Audio ZVX-12v2 D2

Best box: 17.1 L sealed · Fc 68.5 Hz · F3 69.6 Hz

Predicted SPL response of the Skar Audio ZVX-12v2 D2 in the recommended 17.1 L sealed box versus the alternative — open it in the simulator Open and tweak this box live ↗

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⚠️ Engineering Notice for Builders

  • Straight vent would be 158.2 cm long: not physically buildable as a simple tube. Use a passive radiator, a folded slot port or model a 3D folded duct in Load Forge Studio.

Textbook Bass Reflex — not recommended

PORT NOT BUILDABLE
Net Box Volume (Vb) 38.0 Liters
Tuning Frequency (Fb) 37.9 Hz
F3 (-3 dB Cutoff) 35.1 Hz
F6 / F10 Extension 32.6 Hz / 29.7 Hz
Port Inner Diameter Ø 20.0 cm
Port Physical Length 158.2 cm
First Pipe Resonance 109.0 Hz
Estimated MOL @ F3 119.7 dB SPL
⚠️ Port feasibility: a straight tube would need 158.2 cm and cannot fit in a practical cabinet, and no nearby retune stays buildable without a bass hump. Prefer the sealed alignment, a passive radiator, or a 3D folded duct in Load Forge Studio.
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Recommended Sealed (Acoustic Suspension)

MAX TRANSIENT DAMPING
Net Box Volume (Vb) 17.1 Liters
System Q (Qtc) 0.707 (Butterworth)
System Resonance (Fc) 68.5 Hz
F3 (-3 dB Cutoff) 69.6 Hz
F6 / F10 Extension 47.2 Hz / 33.0 Hz
Air Spring Linearity High (Zero port compression)
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Thiele/Small Parameters

Resonance (Fs) 44.0 Hz
Total Q (Qts) 0.45
Electrical Q (Qes) 0.487
Mechanical Q (Qms) 5.95
Equivalent Volume (Vas) 25.1 Liters
Diaphragm Area (Sd) 510.0 cm²
DC Resistance (Re) 2.5 Ω
Efficiency Bandwidth Product (EBP) 90.4
Linear Excursion (Xmax) 29.0 mm
Thermal Power (Pe) 3000.0 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 Skar Audio ZVX-12v2 D2?

A simple ported box is not recommended for Skar Audio ZVX-12v2 D2: the textbook alignment (38.0 liters tuned to 37.9 Hz) needs a 158.2 cm port, and no nearby retune stays buildable without a bass hump. A sealed box, a passive radiator or a folded duct is the practical choice.

Can Skar Audio ZVX-12v2 D2 be used in a sealed box?

Yes. In a sealed (acoustic suspension) enclosure of 17.1 liters with a Qtc of 0.707 (Butterworth), the system exhibits an F3 of 69.6 Hz.

What port dimensions should be used for Skar Audio ZVX-12v2 D2 to avoid port chuffing?

A straight 20.0 cm port would need 158.2 cm of length, which does not fit a practical cabinet. Use a passive radiator or a folded/3D duct instead of a straight tube.

Shareable Acoustic Card for Forums & Social Media

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Skar Audio ZVX-12v2 D2 Enclosure Card
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