SB Acoustics MW13PNW-4
Best box: 5.1 L bass reflex tuned to 56.0 Hz · F3 61.5 Hz
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Comparable 5.0" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the SB Acoustics MW13PNW-4 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) | 5.1 Liters |
| Tuning Frequency (Fb) | 56.0 Hz |
| F3 (-3 dB Cutoff) | 61.5 Hz |
| F6 / F10 Extension | 52.9 Hz / 45.4 Hz |
| Port Inner Diameter | Ø 5.0 cm |
| Port Physical Length | 33.2 cm |
| First Pipe Resonance | 518.0 Hz |
| Estimated MOL @ F3 | 99.6 dB SPL |
Recommended Sealed (Acoustic Suspension)
MAX TRANSIENT DAMPING| Net Box Volume (Vb) | 2.5 Liters |
| System Q (Qtc) | 0.707 (Butterworth) |
| System Resonance (Fc) | 105.2 Hz |
| F3 (-3 dB Cutoff) | 102.8 Hz |
| F6 / F10 Extension | 78.3 Hz / 59.2 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 41.0 Hz |
| Total Q (Qts) | 0.27 |
| Electrical Q (Qes) | 0.291 |
| Mechanical Q (Qms) | 3.71 |
| Equivalent Volume (Vas) | 14.6 Liters |
| Diaphragm Area (Sd) | 70.0 cm² |
| DC Resistance (Re) | 3.8 Ω |
| Efficiency Bandwidth Product (EBP) | 140.8 |
| Linear Excursion (Xmax) | 5.0 mm |
| Thermal Power (Pe) | 40.0 W |
| Nominal Diameter | 5.0" |
| Catalog Source | Load Forge catalog (manufacturer datasheets and retailer listings) |
Frequently Asked Questions
What is the recommended ported (bass reflex) box volume for SB Acoustics MW13PNW-4?
Load Forge's calculated alignment puts SB Acoustics MW13PNW-4 in a 5.1 liter vented enclosure tuned to 56.0 Hz, reaching an F3 cutoff of approximately 61.5 Hz.
Can SB Acoustics MW13PNW-4 be used in a sealed box?
Yes. In a sealed (acoustic suspension) enclosure of 2.5 liters with a Qtc of 0.707 (Butterworth), the system exhibits an F3 of 102.8 Hz.
What port dimensions should be used for SB Acoustics MW13PNW-4 to avoid port chuffing?
Sized from cone displacement (Sd × Xmax), a minimum port diameter of 5.0 cm with a length of 33.2 cm is suggested; check the port air velocity at your drive level in the Load Forge Studio.
Shareable Acoustic Card for Forums & Social Media
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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