Oberton OBN18XB1301
Best box: 83.5 L bass reflex tuned to 44.0 Hz · F3 47.6 Hz
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Comparable 18.0" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the Oberton OBN18XB1301 does not fit your target box volume or tuning. Each entry links to its full enclosure design and Thiele/Small parameters.
Recommended Bass Reflex (Vented)
PORT BUILDABLE| Net Box Volume (Vb) | 83.5 Liters |
| Tuning Frequency (Fb) | 44.0 Hz |
| F3 (-3 dB Cutoff) | 47.6 Hz |
| F6 / F10 Extension | 40.9 Hz / 35.2 Hz |
| Port Inner Diameter | Ø 20.0 cm |
| Port Physical Length | 44.0 cm |
| First Pipe Resonance | 391.0 Hz |
| Estimated MOL @ F3 | 123.6 dB SPL |
Recommended Sealed (Acoustic Suspension)
MAX TRANSIENT DAMPING| Net Box Volume (Vb) | 38.6 Liters |
| System Q (Qtc) | 0.707 (Butterworth) |
| System Resonance (Fc) | 79.6 Hz |
| F3 (-3 dB Cutoff) | 82.0 Hz |
| F6 / F10 Extension | 62.6 Hz / 47.6 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 35.7 Hz |
| Total Q (Qts) | 0.302 |
| Electrical Q (Qes) | 0.316 |
| Mechanical Q (Qms) | 6.79 |
| Equivalent Volume (Vas) | 172.9 Liters |
| Diaphragm Area (Sd) | 1158.0 cm² |
| DC Resistance (Re) | 5.13 Ω |
| Efficiency Bandwidth Product (EBP) | 113.0 |
| Linear Excursion (Xmax) | 12.0 mm |
| Thermal Power (Pe) | 1300.0 W |
| Nominal Diameter | 18.0" |
| Catalog Source | Load Forge catalog (manufacturer datasheets and retailer listings) |
Frequently Asked Questions
What is the recommended ported (bass reflex) box volume for Oberton OBN18XB1301?
Load Forge's calculated alignment puts Oberton OBN18XB1301 in a 83.5 liter vented enclosure tuned to 44.0 Hz, reaching an F3 cutoff of approximately 47.6 Hz.
Can Oberton OBN18XB1301 be used in a sealed box?
Yes. In a sealed (acoustic suspension) enclosure of 38.6 liters with a Qtc of 0.707 (Butterworth), the system exhibits an F3 of 82.0 Hz.
What port dimensions should be used for Oberton OBN18XB1301 to avoid port chuffing?
Sized from cone displacement (Sd × Xmax), a minimum port diameter of 20.0 cm with a length of 44.0 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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