Dayton Audio SIG180-4 6.5” Signature Series Woofer 80W Driver 4 Ohm
Best box: 21.7 L bass reflex tuned to 40.6 Hz · F3 39.5 Hz
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Comparable 7.0" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the Dayton Audio SIG180-4 6.5” Signature Series Woofer 80W Driver 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) | 21.7 Liters |
| Tuning Frequency (Fb) | 40.6 Hz |
| F3 (-3 dB Cutoff) | 39.5 Hz |
| F6 / F10 Extension | 35.0 Hz / 30.8 Hz |
| Port Inner Diameter | Ø 5.0 cm |
| Port Physical Length | 12.9 cm |
| First Pipe Resonance | 1335.0 Hz |
| Estimated MOL @ F3 | 103.2 dB SPL |
Recommended Sealed (Acoustic Suspension)
MAX TRANSIENT DAMPING| Net Box Volume (Vb) | 9.4 Liters |
| System Q (Qtc) | 0.707 (Butterworth) |
| System Resonance (Fc) | 73.7 Hz |
| F3 (-3 dB Cutoff) | 74.3 Hz |
| F6 / F10 Extension | 56.1 Hz / 42.4 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 40.5 Hz |
| Total Q (Qts) | 0.38 |
| Electrical Q (Qes) | 0.41 |
| Mechanical Q (Qms) | 5.19 |
| Equivalent Volume (Vas) | 23.2 Liters |
| Diaphragm Area (Sd) | 143.0 cm² |
| DC Resistance (Re) | 3.7 Ω |
| Efficiency Bandwidth Product (EBP) | 98.8 |
| Linear Excursion (Xmax) | 5.0 mm |
| Thermal Power (Pe) | 80.0 W |
| Nominal Diameter | 7.0" |
| Catalog Source | Load Forge catalog (manufacturer datasheets and retailer listings) |
Frequently Asked Questions
What is the recommended ported (bass reflex) box volume for Dayton Audio SIG180-4 6.5” Signature Series Woofer 80W Driver 4 Ohm?
Load Forge's calculated alignment puts Dayton Audio SIG180-4 6.5” Signature Series Woofer 80W Driver 4 Ohm in a 21.7 liter vented enclosure tuned to 40.6 Hz, reaching an F3 cutoff of approximately 39.5 Hz.
Can Dayton Audio SIG180-4 6.5” Signature Series Woofer 80W Driver 4 Ohm be used in a sealed box?
Yes. In a sealed (acoustic suspension) enclosure of 9.4 liters with a Qtc of 0.707 (Butterworth), the system exhibits an F3 of 74.3 Hz.
What port dimensions should be used for Dayton Audio SIG180-4 6.5” Signature Series Woofer 80W Driver 4 Ohm to avoid port chuffing?
Sized from cone displacement (Sd × Xmax), a minimum port diameter of 5.0 cm with a length of 12.9 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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