Dayton Audio HARB252-8 Full-range Woofer
Best box: 1.5 L bass reflex tuned to 146.3 Hz · F3 130.1 Hz
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Comparable 8.0" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the Dayton Audio HARB252-8 Full-range Woofer 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
- Limited linear excursion (Xmax: 1.3 mm); set a high-pass subsonic filter at 25–30 Hz when driven with high power.
Recommended Bass Reflex (Vented)
PORT BUILDABLE| Net Box Volume (Vb) | 1.5 Liters |
| Tuning Frequency (Fb) | 146.3 Hz |
| F3 (-3 dB Cutoff) | 130.1 Hz |
| F6 / F10 Extension | 122.7 Hz / 115.3 Hz |
| Port Inner Diameter | Ø 5.0 cm |
| Port Physical Length | 14.8 cm |
| First Pipe Resonance | 1166.0 Hz |
| Estimated MOL @ F3 | 96.4 dB SPL |
Sealed (Acoustic Suspension) — compromise
SUITS INFINITE / OPEN BAFFLEWith Qts 1.74 a Butterworth (Qtc 0.707) box would be many times Vas. A box equal to Vas reaches Qtc 2.461; for a flat response this driver is better used on an infinite (IB) or open baffle.
| Net Box Volume (Vb) | 0.2 Liters |
| System Q (Qtc) | 2.461 (above Butterworth: Qtc cannot fall below Qts (1.74)) |
| System Resonance (Fc) | 243.4 Hz |
| F3 (-3 dB Cutoff) | 210.2 Hz |
| F6 / F10 Extension | 189.1 Hz / 163.8 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 172.1 Hz |
| Total Q (Qts) | 1.74 |
| Electrical Q (Qes) | 2.956 |
| Mechanical Q (Qms) | 4.23 |
| Equivalent Volume (Vas) | 0.2 Liters |
| Diaphragm Area (Sd) | 220.0 cm² |
| DC Resistance (Re) | 7.2 Ω |
| Efficiency Bandwidth Product (EBP) | 58.2 |
| Linear Excursion (Xmax) | 1.3 mm |
| Thermal Power (Pe) | 10.0 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 HARB252-8 Full-range Woofer?
Load Forge's calculated alignment puts Dayton Audio HARB252-8 Full-range Woofer in a 1.5 liter vented enclosure tuned to 146.3 Hz, reaching an F3 cutoff of approximately 130.1 Hz.
Can Dayton Audio HARB252-8 Full-range Woofer be used in a sealed box?
Yes. In a sealed (acoustic suspension) enclosure of 0.2 liters with a Qtc of 2.461 (above Butterworth: Qtc cannot fall below Qts (1.74)), the system exhibits an F3 of 210.2 Hz.
What port dimensions should be used for Dayton Audio HARB252-8 Full-range Woofer to avoid port chuffing?
Sized from cone displacement (Sd × Xmax), a minimum port diameter of 5.0 cm with a length of 14.8 cm is suggested; check the port air velocity at your drive level in the Load Forge Studio.
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