Tang Band W5-1138SMF
Best box: 7.3 L bass reflex tuned to 41.3 Hz · F3 39.0 Hz
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Comparable 5.0" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the Tang Band W5-1138SMF 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 (7.3 L at 35.9 Hz) would need a 59.0 cm port; the recommendation is retuned to 7.3 L at 41.3 Hz so the port can be built.
Recommended Bass Reflex (Vented)
PORT BUILDABLE| Net Box Volume (Vb) | 7.3 Liters |
| Tuning Frequency (Fb) | 41.3 Hz |
| F3 (-3 dB Cutoff) | 39.0 Hz |
| F6 / F10 Extension | 34.5 Hz / 30.7 Hz |
| Port Inner Diameter | Ø 5.0 cm |
| Port Physical Length | 43.7 cm |
| First Pipe Resonance | 394.0 Hz |
| Estimated MOL @ F3 | 95.1 dB SPL |
Recommended Sealed (Acoustic Suspension)
MAX TRANSIENT DAMPING| Net Box Volume (Vb) | 4.5 Liters |
| System Q (Qtc) | 0.707 (Butterworth) |
| System Resonance (Fc) | 64.4 Hz |
| F3 (-3 dB Cutoff) | 66.2 Hz |
| F6 / F10 Extension | 50.8 Hz / 38.8 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 45.0 Hz |
| Total Q (Qts) | 0.49 |
| Electrical Q (Qes) | 0.568 |
| Mechanical Q (Qms) | 3.56 |
| Equivalent Volume (Vas) | 4.8 Liters |
| Diaphragm Area (Sd) | 94.0 cm² |
| DC Resistance (Re) | 3.4 Ω |
| Efficiency Bandwidth Product (EBP) | 79.2 |
| Linear Excursion (Xmax) | 9.2 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 Tang Band W5-1138SMF?
Load Forge's calculated alignment puts Tang Band W5-1138SMF in a 7.3 liter vented enclosure tuned to 41.3 Hz, reaching an F3 cutoff of approximately 39.0 Hz.
Can Tang Band W5-1138SMF be used in a sealed box?
Yes. In a sealed (acoustic suspension) enclosure of 4.5 liters with a Qtc of 0.707 (Butterworth), the system exhibits an F3 of 66.2 Hz.
What port dimensions should be used for Tang Band W5-1138SMF to avoid port chuffing?
Sized from cone displacement (Sd × Xmax), a minimum port diameter of 5.0 cm with a length of 43.7 cm is suggested; check the port air velocity at your drive level in the Load Forge Studio.
Shareable Acoustic Card for Forums & Social Media
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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