Hertz DS30 3
Best box: 56.0 L bass reflex tuned to 28.6 Hz · F3 38.7 Hz
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Comparable 12.0" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the Hertz DS30 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 (56.0 L at 27.2 Hz) would need a 49.7 cm port; the recommendation is retuned to 56.0 L at 28.6 Hz so the port can be built.
Recommended Bass Reflex (Vented)
PORT BUILDABLE| Net Box Volume (Vb) | 56.0 Liters |
| Tuning Frequency (Fb) | 28.6 Hz |
| F3 (-3 dB Cutoff) | 38.7 Hz |
| F6 / F10 Extension | 31.6 Hz / 24.4 Hz |
| Port Inner Diameter | Ø 10.0 cm |
| Port Physical Length | 44.2 cm |
| First Pipe Resonance | 389.0 Hz |
| Estimated MOL @ F3 | 115.1 dB SPL |
Sealed (Acoustic Suspension) — compromise
SUITS INFINITE / OPEN BAFFLEWith Qts 0.62 a Butterworth (Qtc 0.707) box would be many times Vas. A box equal to Vas reaches Qtc 0.877; for a flat response this driver is better used on an infinite (IB) or open baffle.
| Net Box Volume (Vb) | 70.0 Liters |
| System Q (Qtc) | 0.877 (above Butterworth) |
| System Resonance (Fc) | 45.3 Hz |
| F3 (-3 dB Cutoff) | 39.9 Hz |
| F6 / F10 Extension | 32.1 Hz / 25.3 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 32.0 Hz |
| Total Q (Qts) | 0.62 |
| Electrical Q (Qes) | 0.705 |
| Mechanical Q (Qms) | 5.14 |
| Equivalent Volume (Vas) | 70.0 Liters |
| Diaphragm Area (Sd) | 527.7 cm² |
| DC Resistance (Re) | 3.3 Ω |
| Efficiency Bandwidth Product (EBP) | 45.4 |
| Linear Excursion (Xmax) | 9.0 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 DS30 3?
Load Forge's calculated alignment puts Hertz DS30 3 in a 56.0 liter vented enclosure tuned to 28.6 Hz, reaching an F3 cutoff of approximately 38.7 Hz.
Can Hertz DS30 3 be used in a sealed box?
Yes. In a sealed (acoustic suspension) enclosure of 70.0 liters with a Qtc of 0.877 (above Butterworth), the system exhibits an F3 of 39.9 Hz.
What port dimensions should be used for Hertz DS30 3 to avoid port chuffing?
Sized from cone displacement (Sd × Xmax), a minimum port diameter of 10.0 cm with a length of 44.2 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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