Tang Band W8-740P
Best box: 7.8 L bass reflex tuned to 41.6 Hz · F3 44.4 Hz
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Comparable 8.0" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the Tang Band W8-740P 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 (7.8 L at 39.6 Hz) would need a 102.9 cm port; the recommendation is retuned to 7.8 L at 41.6 Hz so the port can be built.
- Port length (92.7 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) | 7.8 Liters |
| Tuning Frequency (Fb) | 41.6 Hz |
| F3 (-3 dB Cutoff) | 44.4 Hz |
| F6 / F10 Extension | 38.6 Hz / 33.4 Hz |
| Port Inner Diameter | Ø 7.5 cm |
| Port Physical Length | 92.7 cm |
| First Pipe Resonance | 185.0 Hz |
| Estimated MOL @ F3 | 102.0 dB SPL |
Recommended Sealed (Acoustic Suspension)
MAX TRANSIENT DAMPING| Net Box Volume (Vb) | 3.7 Liters |
| System Q (Qtc) | 0.707 (Butterworth) |
| System Resonance (Fc) | 75.1 Hz |
| F3 (-3 dB Cutoff) | 76.7 Hz |
| F6 / F10 Extension | 57.8 Hz / 43.6 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 30.0 Hz |
| Total Q (Qts) | 0.28 |
| Electrical Q (Qes) | 0.303 |
| Mechanical Q (Qms) | 3.69 |
| Equivalent Volume (Vas) | 20.0 Liters |
| Diaphragm Area (Sd) | 220.0 cm² |
| DC Resistance (Re) | 3.2 Ω |
| Efficiency Bandwidth Product (EBP) | 99.0 |
| Linear Excursion (Xmax) | 12.1 mm |
| Thermal Power (Pe) | 120.0 W |
| Nominal Diameter | 8.0" |
| 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 W8-740P?
Load Forge's calculated alignment puts Tang Band W8-740P in a 7.8 liter vented enclosure tuned to 41.6 Hz, reaching an F3 cutoff of approximately 44.4 Hz.
Can Tang Band W8-740P be used in a sealed box?
Yes. In a sealed (acoustic suspension) enclosure of 3.7 liters with a Qtc of 0.707 (Butterworth), the system exhibits an F3 of 76.7 Hz.
What port dimensions should be used for Tang Band W8-740P to avoid port chuffing?
Sized from cone displacement (Sd × Xmax), a minimum port diameter of 7.5 cm with a length of 92.7 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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