Reflex Optimized
Dayton Audio CE67PR-4
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: 2.2 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) | 185.3 Hz |
| F3 (-3 dB Cutoff) | 171.4 Hz |
| F6 / F10 Extension | 163.3 Hz / 153.4 Hz |
| Port Inner Diameter | Ø 5.0 cm |
| Port Physical Length | 7.9 cm |
| First Pipe Resonance | 2190.0 Hz |
| Estimated MOL @ F3 | 101.9 dB SPL |
Recommended Sealed (Acoustic Suspension)
MAX TRANSIENT DAMPING| Net Box Volume (Vb) | 0.4 Liters |
| System Q (Qtc) | 1.029 (Butterworth Q=0.707) |
| System Resonance (Fc) | 241.4 Hz |
| F3 (-3 dB Cutoff) | 166.4 Hz |
| F6 / F10 Extension | 141.1 Hz / 113.9 Hz |
| Air Spring Linearity | High (Zero port compression) |
Verified Thiele/Small Parameters
| Resonance (Fs) | 218.0 Hz |
| Total Q (Qts) | 0.92 |
| Electrical Q (Qes) | 1.104 |
| Mechanical Q (Qms) | 5.52 |
| Equivalent Volume (Vas) | 0.1 Liters |
| Diaphragm Area (Sd) | 16.6 cm² |
| DC Resistance (Re) | 4.54 Ω |
| Efficiency Bandwidth Product (EBP) | 197.5 |
| Linear Excursion (Xmax) | 2.2 mm |
| Thermal Power (Pe) | 15.0 W |
| Nominal Diameter | 2.0" |
| 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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