Kartesian Sub150_vHE
Best box: 115.2 L bass reflex tuned to 23.9 Hz · F3 24.9 Hz
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Comparable 15.0" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the Kartesian Sub150_vHE 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
- Port length (69.8 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) | 115.2 Liters |
| Tuning Frequency (Fb) | 23.9 Hz |
| F3 (-3 dB Cutoff) | 24.9 Hz |
| F6 / F10 Extension | 21.6 Hz / 18.8 Hz |
| Port Inner Diameter | Ø 15.0 cm |
| Port Physical Length | 69.8 cm |
| First Pipe Resonance | 247.0 Hz |
| Estimated MOL @ F3 | 115.5 dB SPL |
Recommended Sealed (Acoustic Suspension)
MAX TRANSIENT DAMPING| Net Box Volume (Vb) | 51.5 Liters |
| System Q (Qtc) | 0.707 (Butterworth) |
| System Resonance (Fc) | 44.1 Hz |
| F3 (-3 dB Cutoff) | 45.7 Hz |
| F6 / F10 Extension | 34.3 Hz / 25.8 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 21.0 Hz |
| Total Q (Qts) | 0.33 |
| Electrical Q (Qes) | 0.351 |
| Mechanical Q (Qms) | 5.5 |
| Equivalent Volume (Vas) | 185.0 Liters |
| Diaphragm Area (Sd) | 855.0 cm² |
| DC Resistance (Re) | 5.9 Ω |
| Efficiency Bandwidth Product (EBP) | 59.8 |
| Linear Excursion (Xmax) | 20.0 mm |
| Thermal Power (Pe) | 1000.0 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 Kartesian Sub150_vHE?
Load Forge's calculated alignment puts Kartesian Sub150_vHE in a 115.2 liter vented enclosure tuned to 23.9 Hz, reaching an F3 cutoff of approximately 24.9 Hz.
Can Kartesian Sub150_vHE be used in a sealed box?
Yes. In a sealed (acoustic suspension) enclosure of 51.5 liters with a Qtc of 0.707 (Butterworth), the system exhibits an F3 of 45.7 Hz.
What port dimensions should be used for Kartesian Sub150_vHE to avoid port chuffing?
Sized from cone displacement (Sd × Xmax), a minimum port diameter of 15.0 cm with a length of 69.8 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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