Dayton Audio UMII10-22 Ultimax II 10" DVC Subwoofer 2 Ohm Per Coil
Best box: 31.9 L bass reflex tuned to 27.3 Hz · F3 34.2 Hz
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Comparable 10.0" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the Dayton Audio UMII10-22 Ultimax II 10" DVC Subwoofer 2 Ohm Per Coil 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
- Port length (91.9 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) | 31.9 Liters |
| Tuning Frequency (Fb) | 27.3 Hz |
| F3 (-3 dB Cutoff) | 34.2 Hz |
| F6 / F10 Extension | 24.6 Hz / 20.9 Hz |
| Port Inner Diameter | Ø 10.0 cm |
| Port Physical Length | 91.9 cm |
| First Pipe Resonance | 187.0 Hz |
| Estimated MOL @ F3 | 109.3 dB SPL |
Recommended Sealed (Acoustic Suspension)
MAX TRANSIENT DAMPING| Net Box Volume (Vb) | 39.4 Liters |
| System Q (Qtc) | 0.707 (Butterworth) |
| System Resonance (Fc) | 47.8 Hz |
| F3 (-3 dB Cutoff) | 48.1 Hz |
| F6 / F10 Extension | 36.3 Hz / 27.5 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 39.0 Hz |
| Total Q (Qts) | 0.57 |
| Electrical Q (Qes) | 0.725 |
| Mechanical Q (Qms) | 2.67 |
| Equivalent Volume (Vas) | 21.2 Liters |
| Diaphragm Area (Sd) | 345.0 cm² |
| DC Resistance (Re) | 4.0 Ω |
| Efficiency Bandwidth Product (EBP) | 53.8 |
| Linear Excursion (Xmax) | 20.0 mm |
| Thermal Power (Pe) | 600.0 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 Dayton Audio UMII10-22 Ultimax II 10" DVC Subwoofer 2 Ohm Per Coil?
Load Forge's calculated alignment puts Dayton Audio UMII10-22 Ultimax II 10" DVC Subwoofer 2 Ohm Per Coil in a 31.9 liter vented enclosure tuned to 27.3 Hz, reaching an F3 cutoff of approximately 34.2 Hz.
Can Dayton Audio UMII10-22 Ultimax II 10" DVC Subwoofer 2 Ohm Per Coil be used in a sealed box?
Yes. In a sealed (acoustic suspension) enclosure of 39.4 liters with a Qtc of 0.707 (Butterworth), the system exhibits an F3 of 48.1 Hz.
What port dimensions should be used for Dayton Audio UMII10-22 Ultimax II 10" DVC Subwoofer 2 Ohm Per Coil to avoid port chuffing?
Sized from cone displacement (Sd × Xmax), a minimum port diameter of 10.0 cm with a length of 91.9 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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