Eminence Delta-12A 12" Driver 8 Ohm
Best box: 108.2 L bass reflex tuned to 49.4 Hz · F3 45.7 Hz
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Comparable 12.0" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the Eminence Delta-12A 12" Driver 8 Ohm 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
- Limited linear excursion (Xmax: 2.4 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) | 108.2 Liters |
| Tuning Frequency (Fb) | 49.4 Hz |
| F3 (-3 dB Cutoff) | 45.7 Hz |
| F6 / F10 Extension | 41.3 Hz / 36.9 Hz |
| Port Inner Diameter | Ø 12.5 cm |
| Port Physical Length | 5.0 cm |
| First Pipe Resonance | 3444.0 Hz |
| Estimated MOL @ F3 | 112.9 dB SPL |
Recommended Sealed (Acoustic Suspension)
MAX TRANSIENT DAMPING| Net Box Volume (Vb) | 47.7 Liters |
| System Q (Qtc) | 0.707 (Butterworth) |
| System Resonance (Fc) | 84.2 Hz |
| F3 (-3 dB Cutoff) | 85.5 Hz |
| F6 / F10 Extension | 64.6 Hz / 48.7 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 55.0 Hz |
| Total Q (Qts) | 0.43 |
| Electrical Q (Qes) | 0.468 |
| Mechanical Q (Qms) | 5.27 |
| Equivalent Volume (Vas) | 81.3 Liters |
| Diaphragm Area (Sd) | 519.5 cm² |
| DC Resistance (Re) | 6.3 Ω |
| Efficiency Bandwidth Product (EBP) | 117.5 |
| Linear Excursion (Xmax) | 2.4 mm |
| Thermal Power (Pe) | 400.0 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 Delta-12A 12" Driver 8 Ohm?
Load Forge's calculated alignment puts Eminence Delta-12A 12" Driver 8 Ohm in a 108.2 liter vented enclosure tuned to 49.4 Hz, reaching an F3 cutoff of approximately 45.7 Hz.
Can Eminence Delta-12A 12" Driver 8 Ohm be used in a sealed box?
Yes. In a sealed (acoustic suspension) enclosure of 47.7 liters with a Qtc of 0.707 (Butterworth), the system exhibits an F3 of 85.5 Hz.
What port dimensions should be used for Eminence Delta-12A 12" Driver 8 Ohm to avoid port chuffing?
Sized from cone displacement (Sd × Xmax), a minimum port diameter of 12.5 cm with a length of 5.0 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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