Oberton 15NMB35
Best box: 115.4 L bass reflex tuned to 43.8 Hz · F3 43.3 Hz
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Comparable 15.0" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the Oberton 15NMB35 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) | 115.4 Liters |
| Tuning Frequency (Fb) | 43.8 Hz |
| F3 (-3 dB Cutoff) | 43.3 Hz |
| F6 / F10 Extension | 38.5 Hz / 33.7 Hz |
| Port Inner Diameter | Ø 12.5 cm |
| Port Physical Length | 7.7 cm |
| First Pipe Resonance | 2240.0 Hz |
| Estimated MOL @ F3 | 120.5 dB SPL |
Recommended Sealed (Acoustic Suspension)
MAX TRANSIENT DAMPING| Net Box Volume (Vb) | 51.4 Liters |
| System Q (Qtc) | 0.707 (Butterworth) |
| System Resonance (Fc) | 77.1 Hz |
| F3 (-3 dB Cutoff) | 78.4 Hz |
| F6 / F10 Extension | 59.1 Hz / 44.6 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 38.9 Hz |
| Total Q (Qts) | 0.335 |
| Electrical Q (Qes) | 0.348 |
| Mechanical Q (Qms) | 8.88 |
| Equivalent Volume (Vas) | 177.5 Liters |
| Diaphragm Area (Sd) | 829.6 cm² |
| DC Resistance (Re) | 5.4 Ω |
| Efficiency Bandwidth Product (EBP) | 111.8 |
| Linear Excursion (Xmax) | 6.8 mm |
| Thermal Power (Pe) | 600.0 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 Oberton 15NMB35?
Load Forge's calculated alignment puts Oberton 15NMB35 in a 115.4 liter vented enclosure tuned to 43.8 Hz, reaching an F3 cutoff of approximately 43.3 Hz.
Can Oberton 15NMB35 be used in a sealed box?
Yes. In a sealed (acoustic suspension) enclosure of 51.4 liters with a Qtc of 0.707 (Butterworth), the system exhibits an F3 of 78.4 Hz.
What port dimensions should be used for Oberton 15NMB35 to avoid port chuffing?
Sized from cone displacement (Sd × Xmax), a minimum port diameter of 12.5 cm with a length of 7.7 cm is suggested; check the port air velocity at your drive level in the Load Forge Studio.
Shareable Acoustic Card for Forums & Social Media
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