Eminence EMIP620HC
Best box: 13.0 L bass reflex tuned to 91.0 Hz · F3 86.6 Hz
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Comparable 6.5" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the Eminence EMIP620HC 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: 0.4 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) | 13.0 Liters |
| Tuning Frequency (Fb) | 91.0 Hz |
| F3 (-3 dB Cutoff) | 86.6 Hz |
| F6 / F10 Extension | 76.4 Hz / 67.8 Hz |
| Port Inner Diameter | Ø 6.8 cm |
| Port Physical Length | 5.3 cm |
| First Pipe Resonance | 3276.0 Hz |
| Estimated MOL @ F3 | 98.7 dB SPL |
Recommended Sealed (Acoustic Suspension)
MAX TRANSIENT DAMPING| Net Box Volume (Vb) | 8.0 Liters |
| System Q (Qtc) | 0.707 (Butterworth) |
| System Resonance (Fc) | 154.1 Hz |
| F3 (-3 dB Cutoff) | 156.6 Hz |
| F6 / F10 Extension | 118.7 Hz / 89.8 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 114.0 Hz |
| Total Q (Qts) | 0.49 |
| Electrical Q (Qes) | 0.538 |
| Mechanical Q (Qms) | 5.5 |
| Equivalent Volume (Vas) | 8.7 Liters |
| Diaphragm Area (Sd) | 139.7 cm² |
| DC Resistance (Re) | 3.94 Ω |
| Efficiency Bandwidth Product (EBP) | 211.9 |
| Linear Excursion (Xmax) | 0.4 mm |
| Thermal Power (Pe) | 20.0 W |
| Nominal Diameter | 6.5" |
| Catalog Source | Load Forge catalog (manufacturer datasheets and retailer listings) |
Frequently Asked Questions
What is the recommended ported (bass reflex) box volume for Eminence EMIP620HC?
Load Forge's calculated alignment puts Eminence EMIP620HC in a 13.0 liter vented enclosure tuned to 91.0 Hz, reaching an F3 cutoff of approximately 86.6 Hz.
Can Eminence EMIP620HC be used in a sealed box?
Yes. In a sealed (acoustic suspension) enclosure of 8.0 liters with a Qtc of 0.707 (Butterworth), the system exhibits an F3 of 156.6 Hz.
What port dimensions should be used for Eminence EMIP620HC to avoid port chuffing?
Sized from cone displacement (Sd × Xmax), a minimum port diameter of 6.8 cm with a length of 5.3 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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