Hertz LEGEND ML2500.3
Best box: 21.6 L bass reflex tuned to 32.3 Hz · F3 38.2 Hz
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Comparable 10.0" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the Hertz LEGEND ML2500.3 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
- The textbook alignment (18.8 L at 28.1 Hz) would need a 151.4 cm port; the recommendation is retuned to 21.6 L at 32.3 Hz so the port can be built.
- Port length (97.3 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) | 21.6 Liters |
| Tuning Frequency (Fb) | 32.3 Hz |
| F3 (-3 dB Cutoff) | 38.2 Hz |
| F6 / F10 Extension | 31.4 Hz / 25.5 Hz |
| Port Inner Diameter | Ø 10.0 cm |
| Port Physical Length | 97.3 cm |
| First Pipe Resonance | 177.0 Hz |
| Estimated MOL @ F3 | 120.8 dB SPL |
Sealed (Acoustic Suspension) — compromise
SUITS INFINITE / OPEN BAFFLEWith Qts 0.63 a Butterworth (Qtc 0.707) box would be many times Vas. A box equal to Vas reaches Qtc 0.891; for a flat response this driver is better used on an infinite (IB) or open baffle.
| Net Box Volume (Vb) | 23.5 Liters |
| System Q (Qtc) | 0.891 (above Butterworth) |
| System Resonance (Fc) | 46.7 Hz |
| F3 (-3 dB Cutoff) | 43.1 Hz |
| F6 / F10 Extension | 34.3 Hz / 26.8 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 33.0 Hz |
| Total Q (Qts) | 0.63 |
| Electrical Q (Qes) | 0.688 |
| Mechanical Q (Qms) | 7.5 |
| Equivalent Volume (Vas) | 23.5 Liters |
| Diaphragm Area (Sd) | 366.9 cm² |
| DC Resistance (Re) | 2.75 Ω |
| Efficiency Bandwidth Product (EBP) | 48.0 |
| Linear Excursion (Xmax) | 17.0 mm |
| Thermal Power (Pe) | N/A 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 Hertz LEGEND ML2500.3?
Load Forge's calculated alignment puts Hertz LEGEND ML2500.3 in a 21.6 liter vented enclosure tuned to 32.3 Hz, reaching an F3 cutoff of approximately 38.2 Hz.
Can Hertz LEGEND ML2500.3 be used in a sealed box?
Yes. In a sealed (acoustic suspension) enclosure of 23.5 liters with a Qtc of 0.891 (above Butterworth), the system exhibits an F3 of 43.1 Hz.
What port dimensions should be used for Hertz LEGEND ML2500.3 to avoid port chuffing?
Sized from cone displacement (Sd × Xmax), a minimum port diameter of 10.0 cm with a length of 97.3 cm is suggested; check the port air velocity at your drive level in the Load Forge Studio.
Shareable Acoustic Card for Forums & Social Media
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