Skar Audio VVX-15v2 D4
Best box: 58.9 L bass reflex tuned to 38.3 Hz · F3 49.8 Hz
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Comparable 15.0" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the Skar Audio VVX-15v2 D4 does not fit your target box volume or tuning. Each entry links to its full enclosure design and Thiele/Small parameters.
⚠️ Engineering Notice for Builders
- The textbook alignment (58.9 L at 34.8 Hz) would need a 117.7 cm port; the recommendation is retuned to 58.9 L at 38.3 Hz so the port can be built.
- Port length (94.7 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) | 58.9 Liters |
| Tuning Frequency (Fb) | 38.3 Hz |
| F3 (-3 dB Cutoff) | 49.8 Hz |
| F6 / F10 Extension | 41.0 Hz / 32.2 Hz |
| Port Inner Diameter | Ø 20.0 cm |
| Port Physical Length | 94.7 cm |
| First Pipe Resonance | 182.0 Hz |
| Estimated MOL @ F3 | 120.8 dB SPL |
Sealed (Acoustic Suspension) — compromise
SUITS INFINITE / OPEN BAFFLEWith Qts 0.62 a Butterworth (Qtc 0.707) box would be many times Vas. A box equal to Vas reaches Qtc 0.877; for a flat response this driver is better used on an infinite (IB) or open baffle.
| Net Box Volume (Vb) | 73.6 Liters |
| System Q (Qtc) | 0.877 (above Butterworth) |
| System Resonance (Fc) | 57.8 Hz |
| F3 (-3 dB Cutoff) | 50.9 Hz |
| F6 / F10 Extension | 41.1 Hz / 32.4 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 40.9 Hz |
| Total Q (Qts) | 0.62 |
| Electrical Q (Qes) | 0.734 |
| Mechanical Q (Qms) | 3.99 |
| Equivalent Volume (Vas) | 73.6 Liters |
| Diaphragm Area (Sd) | 1027.0 cm² |
| DC Resistance (Re) | 6.4 Ω |
| Efficiency Bandwidth Product (EBP) | 55.7 |
| Linear Excursion (Xmax) | 18.0 mm |
| Thermal Power (Pe) | 1200.0 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 Skar Audio VVX-15v2 D4?
Load Forge's calculated alignment puts Skar Audio VVX-15v2 D4 in a 58.9 liter vented enclosure tuned to 38.3 Hz, reaching an F3 cutoff of approximately 49.8 Hz.
Can Skar Audio VVX-15v2 D4 be used in a sealed box?
Yes. In a sealed (acoustic suspension) enclosure of 73.6 liters with a Qtc of 0.877 (above Butterworth), the system exhibits an F3 of 50.9 Hz.
What port dimensions should be used for Skar Audio VVX-15v2 D4 to avoid port chuffing?
Sized from cone displacement (Sd × Xmax), a minimum port diameter of 20.0 cm with a length of 94.7 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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