Eminence Delta Pro-15A 15" Cast Frame Driver
Best box: 263.4 L bass reflex tuned to 40.2 Hz · F3 37.9 Hz
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Comparable 15.0" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the Eminence Delta Pro-15A 15" Cast Frame Driver 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
- Large enclosure volume (263.4 L) requires extensive internal matrix bracing to prevent panel resonance.
Recommended Bass Reflex (Vented)
PORT BUILDABLE| Net Box Volume (Vb) | 263.4 Liters |
| Tuning Frequency (Fb) | 40.2 Hz |
| F3 (-3 dB Cutoff) | 37.9 Hz |
| F6 / F10 Extension | 34.1 Hz / 30.3 Hz |
| Port Inner Diameter | Ø 20.0 cm |
| Port Physical Length | 7.8 cm |
| First Pipe Resonance | 2199.0 Hz |
| Estimated MOL @ F3 | 120.3 dB SPL |
Recommended Sealed (Acoustic Suspension)
MAX TRANSIENT DAMPING| Net Box Volume (Vb) | 114.7 Liters |
| System Q (Qtc) | 0.707 (Butterworth) |
| System Resonance (Fc) | 67.5 Hz |
| F3 (-3 dB Cutoff) | 68.8 Hz |
| F6 / F10 Extension | 51.7 Hz / 38.9 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 42.0 Hz |
| Total Q (Qts) | 0.4 |
| Electrical Q (Qes) | 0.437 |
| Mechanical Q (Qms) | 4.73 |
| Equivalent Volume (Vas) | 243.5 Liters |
| Diaphragm Area (Sd) | 856.3 cm² |
| DC Resistance (Re) | 5.71 Ω |
| Efficiency Bandwidth Product (EBP) | 96.1 |
| Linear Excursion (Xmax) | 4.3 mm |
| Thermal Power (Pe) | 400.0 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 Eminence Delta Pro-15A 15" Cast Frame Driver?
Load Forge's calculated alignment puts Eminence Delta Pro-15A 15" Cast Frame Driver in a 263.4 liter vented enclosure tuned to 40.2 Hz, reaching an F3 cutoff of approximately 37.9 Hz.
Can Eminence Delta Pro-15A 15" Cast Frame Driver be used in a sealed box?
Yes. In a sealed (acoustic suspension) enclosure of 114.7 liters with a Qtc of 0.707 (Butterworth), the system exhibits an F3 of 68.8 Hz.
What port dimensions should be used for Eminence Delta Pro-15A 15" Cast Frame Driver to avoid port chuffing?
Sized from cone displacement (Sd × Xmax), a minimum port diameter of 20.0 cm with a length of 7.8 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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