Audax HM100G0
Best box: 1.7 L bass reflex tuned to 88.4 Hz · F3 93.3 Hz
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Comparable 3.9" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the Audax HM100G0 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 (1.7 L at 80.4 Hz) would need a 50.0 cm port; the recommendation is retuned to 1.7 L at 88.4 Hz so the port can be built.
- Limited linear excursion (Xmax: 2.1 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) | 1.7 Liters |
| Tuning Frequency (Fb) | 88.4 Hz |
| F3 (-3 dB Cutoff) | 93.3 Hz |
| F6 / F10 Extension | 81.9 Hz / 70.9 Hz |
| Port Inner Diameter | Ø 5.0 cm |
| Port Physical Length | 40.7 cm |
| First Pipe Resonance | 422.0 Hz |
| Estimated MOL @ F3 | 106.5 dB SPL |
Recommended Sealed (Acoustic Suspension)
MAX TRANSIENT DAMPING| Net Box Volume (Vb) | 0.89 Liters |
| System Q (Qtc) | 0.707 (Butterworth) |
| System Resonance (Fc) | 152.7 Hz |
| F3 (-3 dB Cutoff) | 139.3 Hz |
| F6 / F10 Extension | 108.2 Hz / 82.4 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 55.0 Hz |
| Total Q (Qts) | 0.25 |
| Electrical Q (Qes) | 0.27 |
| Mechanical Q (Qms) | 3.34 |
| Equivalent Volume (Vas) | 6.2 Liters |
| Diaphragm Area (Sd) | 51.0 cm² |
| DC Resistance (Re) | 6.4 Ω |
| Efficiency Bandwidth Product (EBP) | 203.5 |
| Linear Excursion (Xmax) | 2.1 mm |
| Thermal Power (Pe) | N/A W |
| Nominal Diameter | 3.9" |
| Catalog Source | Load Forge catalog (manufacturer datasheets and retailer listings) |
Frequently Asked Questions
What is the recommended ported (bass reflex) box volume for Audax HM100G0?
Load Forge's calculated alignment puts Audax HM100G0 in a 1.7 liter vented enclosure tuned to 88.4 Hz, reaching an F3 cutoff of approximately 93.3 Hz.
Can Audax HM100G0 be used in a sealed box?
Yes. In a sealed (acoustic suspension) enclosure of 0.89 liters with a Qtc of 0.707 (Butterworth), the system exhibits an F3 of 139.3 Hz.
What port dimensions should be used for Audax HM100G0 to avoid port chuffing?
Sized from cone displacement (Sd × Xmax), a minimum port diameter of 5.0 cm with a length of 40.7 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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