Hertz S300S4
Best box: 123.3 L bass reflex tuned to 23.1 Hz · F3 29.1 Hz
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Comparable 12.0" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the Hertz S300S4 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 (123.3 L) requires extensive internal matrix bracing to prevent panel resonance.
Recommended Bass Reflex (Vented)
PORT BUILDABLE| Net Box Volume (Vb) | 123.3 Liters |
| Tuning Frequency (Fb) | 23.1 Hz |
| F3 (-3 dB Cutoff) | 29.1 Hz |
| F6 / F10 Extension | 21.0 Hz / 17.6 Hz |
| Port Inner Diameter | Ø 7.5 cm |
| Port Physical Length | 14.8 cm |
| First Pipe Resonance | 1165.0 Hz |
| Estimated MOL @ F3 | 111.9 dB SPL |
Recommended Sealed (Acoustic Suspension)
MAX TRANSIENT DAMPING| Net Box Volume (Vb) | 211.6 Liters |
| System Q (Qtc) | 0.707 (Butterworth) |
| System Resonance (Fc) | 37.9 Hz |
| F3 (-3 dB Cutoff) | 38.1 Hz |
| F6 / F10 Extension | 28.8 Hz / 21.8 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 33.0 Hz |
| Total Q (Qts) | 0.6 |
| Electrical Q (Qes) | 0.65 |
| Mechanical Q (Qms) | 7.8 |
| Equivalent Volume (Vas) | 82.2 Liters |
| Diaphragm Area (Sd) | 529.5 cm² |
| DC Resistance (Re) | 3.6 Ω |
| Efficiency Bandwidth Product (EBP) | 50.8 |
| Linear Excursion (Xmax) | 9.1 mm |
| Thermal Power (Pe) | N/A 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 Hertz S300S4?
Load Forge's calculated alignment puts Hertz S300S4 in a 123.3 liter vented enclosure tuned to 23.1 Hz, reaching an F3 cutoff of approximately 29.1 Hz.
Can Hertz S300S4 be used in a sealed box?
Yes. In a sealed (acoustic suspension) enclosure of 211.6 liters with a Qtc of 0.707 (Butterworth), the system exhibits an F3 of 38.1 Hz.
What port dimensions should be used for Hertz S300S4 to avoid port chuffing?
Sized from cone displacement (Sd × Xmax), a minimum port diameter of 7.5 cm with a length of 14.8 cm is suggested; check the port air velocity at your drive level in the Load Forge Studio.
Shareable Acoustic Card for Forums & Social Media
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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