Eminence Impero_12A
Best box: 40.0 L bass reflex tuned to 50.1 Hz · F3 50.9 Hz
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Comparable 12.0" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the Eminence Impero_12A does not fit your target box volume or tuning. Each entry links to its full enclosure design and Thiele/Small parameters.
Recommended Bass Reflex (Vented)
PORT BUILDABLE| Net Box Volume (Vb) | 40.0 Liters |
| Tuning Frequency (Fb) | 50.1 Hz |
| F3 (-3 dB Cutoff) | 50.9 Hz |
| F6 / F10 Extension | 44.8 Hz / 39.1 Hz |
| Port Inner Diameter | Ø 10.0 cm |
| Port Physical Length | 16.3 cm |
| First Pipe Resonance | 1055.0 Hz |
| Estimated MOL @ F3 | 120.7 dB SPL |
Recommended Sealed (Acoustic Suspension)
MAX TRANSIENT DAMPING| Net Box Volume (Vb) | 18.1 Liters |
| System Q (Qtc) | 0.707 (Butterworth) |
| System Resonance (Fc) | 91.0 Hz |
| F3 (-3 dB Cutoff) | 90.9 Hz |
| F6 / F10 Extension | 68.7 Hz / 51.8 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 42.8 Hz |
| Total Q (Qts) | 0.32 |
| Electrical Q (Qes) | 0.328 |
| Mechanical Q (Qms) | 13.84 |
| Equivalent Volume (Vas) | 70.2 Liters |
| Diaphragm Area (Sd) | 545.4 cm² |
| DC Resistance (Re) | 5.58 Ω |
| Efficiency Bandwidth Product (EBP) | 130.5 |
| Linear Excursion (Xmax) | 6.2 mm |
| Thermal Power (Pe) | 1100.0 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 Impero_12A?
Load Forge's calculated alignment puts Eminence Impero_12A in a 40.0 liter vented enclosure tuned to 50.1 Hz, reaching an F3 cutoff of approximately 50.9 Hz.
Can Eminence Impero_12A be used in a sealed box?
Yes. In a sealed (acoustic suspension) enclosure of 18.1 liters with a Qtc of 0.707 (Butterworth), the system exhibits an F3 of 90.9 Hz.
What port dimensions should be used for Eminence Impero_12A to avoid port chuffing?
Sized from cone displacement (Sd × Xmax), a minimum port diameter of 10.0 cm with a length of 16.3 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.
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