Versatile Load
Dayton Audio HARB252-8
Complete Thiele/Small parameters, optimized ported (bass reflex) and sealed enclosure designs, F3/F6/F10 cutoffs, and vent turbulence analysis calculated by Load Forge.
⚠️ 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)
OPTIMIZED EXTENSION| Net Box Volume (Vb) | 1.5 Liters |
| Tuning Frequency (Fb) | 146.3 Hz |
| F3 (-3 dB Cutoff) | 130.1 Hz |
| F6 / F10 Extension | 123.5 Hz / 116.3 Hz |
| Port Inner Diameter | Ø 5.0 cm |
| Port Physical Length | 14.8 cm |
| First Pipe Resonance | 1166.0 Hz |
| Estimated MOL @ F3 | 94.9 dB SPL |
Recommended Sealed (Acoustic Suspension)
MAX TRANSIENT DAMPING| Net Box Volume (Vb) | 0.8 Liters |
| System Q (Qtc) | 1.945 (Butterworth Q=0.707) |
| System Resonance (Fc) | 190.9 Hz |
| F3 (-3 dB Cutoff) | 160.4 Hz |
| F6 / F10 Extension | 141.5 Hz / 120.1 Hz |
| Air Spring Linearity | High (Zero port compression) |
Verified 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) | 21.2 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 | 2.5" |
| Catalog Source | Manufacturer Official Datasheet |
Shareable Acoustic Card for Forums & Social Media
Embed this verified design card on DIYAudio, AVSForum, Reddit, or Facebook. Includes verified F3, MOL, and box parameters.
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