Wavecor SW215WA01 8-1/2" Balanced Drive Paper Cone Subwoofer 4 Ohm
Best box: 39.1 L bass reflex tuned to 26.3 Hz · F3 25.7 Hz
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Comparable 8.5" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the Wavecor SW215WA01 8-1/2" Balanced Drive Paper Cone Subwoofer 4 Ohm 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) | 39.1 Liters |
| Tuning Frequency (Fb) | 26.3 Hz |
| F3 (-3 dB Cutoff) | 25.7 Hz |
| F6 / F10 Extension | 22.6 Hz / 19.9 Hz |
| Port Inner Diameter | Ø 6.8 cm |
| Port Physical Length | 35.4 cm |
| First Pipe Resonance | 486.0 Hz |
| Estimated MOL @ F3 | 107.5 dB SPL |
Recommended Sealed (Acoustic Suspension)
MAX TRANSIENT DAMPING| Net Box Volume (Vb) | 24.1 Liters |
| System Q (Qtc) | 0.707 (Butterworth) |
| System Resonance (Fc) | 47.0 Hz |
| F3 (-3 dB Cutoff) | 48.4 Hz |
| F6 / F10 Extension | 35.6 Hz / 26.5 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 33.0 Hz |
| Total Q (Qts) | 0.49 |
| Electrical Q (Qes) | 0.513 |
| Mechanical Q (Qms) | 11.0 |
| Equivalent Volume (Vas) | 26.1 Liters |
| Diaphragm Area (Sd) | 206.0 cm² |
| DC Resistance (Re) | 3.3 Ω |
| Efficiency Bandwidth Product (EBP) | 64.3 |
| Linear Excursion (Xmax) | 10.0 mm |
| Thermal Power (Pe) | 400.0 W |
| Nominal Diameter | 8.5" |
| Catalog Source | Load Forge catalog (manufacturer datasheets and retailer listings) |
Frequently Asked Questions
What is the recommended ported (bass reflex) box volume for Wavecor SW215WA01 8-1/2" Balanced Drive Paper Cone Subwoofer 4 Ohm?
Load Forge's calculated alignment puts Wavecor SW215WA01 8-1/2" Balanced Drive Paper Cone Subwoofer 4 Ohm in a 39.1 liter vented enclosure tuned to 26.3 Hz, reaching an F3 cutoff of approximately 25.7 Hz.
Can Wavecor SW215WA01 8-1/2" Balanced Drive Paper Cone Subwoofer 4 Ohm be used in a sealed box?
Yes. In a sealed (acoustic suspension) enclosure of 24.1 liters with a Qtc of 0.707 (Butterworth), the system exhibits an F3 of 48.4 Hz.
What port dimensions should be used for Wavecor SW215WA01 8-1/2" Balanced Drive Paper Cone Subwoofer 4 Ohm to avoid port chuffing?
Sized from cone displacement (Sd × Xmax), a minimum port diameter of 6.8 cm with a length of 35.4 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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