Dayton Audio RS225P-4A 8" Reference Paper Woofer 4 Ohm
Best box: 42.6 L bass reflex tuned to 37.8 Hz · F3 36.7 Hz
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Comparable 8.0" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the Dayton Audio RS225P-4A 8" Reference Paper Woofer 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) | 42.6 Liters |
| Tuning Frequency (Fb) | 37.8 Hz |
| F3 (-3 dB Cutoff) | 36.7 Hz |
| F6 / F10 Extension | 32.6 Hz / 28.7 Hz |
| Port Inner Diameter | Ø 5.0 cm |
| Port Physical Length | 6.1 cm |
| First Pipe Resonance | 2822.0 Hz |
| Estimated MOL @ F3 | 104.6 dB SPL |
Recommended Sealed (Acoustic Suspension)
MAX TRANSIENT DAMPING| Net Box Volume (Vb) | 18.5 Liters |
| System Q (Qtc) | 0.707 (Butterworth) |
| System Resonance (Fc) | 68.0 Hz |
| F3 (-3 dB Cutoff) | 69.5 Hz |
| F6 / F10 Extension | 52.3 Hz / 39.4 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 37.7 Hz |
| Total Q (Qts) | 0.38 |
| Electrical Q (Qes) | 0.478 |
| Mechanical Q (Qms) | 1.85 |
| Equivalent Volume (Vas) | 45.6 Liters |
| Diaphragm Area (Sd) | 213.8 cm² |
| DC Resistance (Re) | 3.3 Ω |
| Efficiency Bandwidth Product (EBP) | 78.8 |
| Linear Excursion (Xmax) | 6.0 mm |
| Thermal Power (Pe) | 80.0 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 Dayton Audio RS225P-4A 8" Reference Paper Woofer 4 Ohm?
Load Forge's calculated alignment puts Dayton Audio RS225P-4A 8" Reference Paper Woofer 4 Ohm in a 42.6 liter vented enclosure tuned to 37.8 Hz, reaching an F3 cutoff of approximately 36.7 Hz.
Can Dayton Audio RS225P-4A 8" Reference Paper Woofer 4 Ohm be used in a sealed box?
Yes. In a sealed (acoustic suspension) enclosure of 18.5 liters with a Qtc of 0.707 (Butterworth), the system exhibits an F3 of 69.5 Hz.
What port dimensions should be used for Dayton Audio RS225P-4A 8" Reference Paper Woofer 4 Ohm to avoid port chuffing?
Sized from cone displacement (Sd × Xmax), a minimum port diameter of 5.0 cm with a length of 6.1 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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