Dayton Audio CFC150-4
Best box: 3.3 L bass reflex tuned to 65.5 Hz · F3 93.4 Hz
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Comparable 5.25" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the Dayton Audio CFC150-4 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: 3.5 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) | 3.3 Liters |
| Tuning Frequency (Fb) | 65.5 Hz |
| F3 (-3 dB Cutoff) | 93.4 Hz |
| F6 / F10 Extension | 77.0 Hz / 59.1 Hz |
| Port Inner Diameter | Ø 5.0 cm |
| Port Physical Length | 38.0 cm |
| First Pipe Resonance | 453.0 Hz |
| Estimated MOL @ F3 | 101.3 dB SPL |
Sealed (Acoustic Suspension) — compromise
SUITS INFINITE / OPEN BAFFLEWith Qts 0.7 a Butterworth (Qtc 0.707) box would be many times Vas. A box equal to Vas reaches Qtc 0.99; for a flat response this driver is better used on an infinite (IB) or open baffle.
| Net Box Volume (Vb) | 4.2 Liters |
| System Q (Qtc) | 0.99 (above Butterworth) |
| System Resonance (Fc) | 108.9 Hz |
| F3 (-3 dB Cutoff) | 91.9 Hz |
| F6 / F10 Extension | 75.2 Hz / 59.9 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 77.0 Hz |
| Total Q (Qts) | 0.7 |
| Electrical Q (Qes) | 0.843 |
| Mechanical Q (Qms) | 4.13 |
| Equivalent Volume (Vas) | 4.2 Liters |
| Diaphragm Area (Sd) | 85.1 cm² |
| DC Resistance (Re) | 3.6 Ω |
| Efficiency Bandwidth Product (EBP) | 91.4 |
| Linear Excursion (Xmax) | 3.5 mm |
| Thermal Power (Pe) | 40.0 W |
| Nominal Diameter | 5.25" |
| 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 CFC150-4?
Load Forge's calculated alignment puts Dayton Audio CFC150-4 in a 3.3 liter vented enclosure tuned to 65.5 Hz, reaching an F3 cutoff of approximately 93.4 Hz.
Can Dayton Audio CFC150-4 be used in a sealed box?
Yes. In a sealed (acoustic suspension) enclosure of 4.2 liters with a Qtc of 0.99 (above Butterworth), the system exhibits an F3 of 91.9 Hz.
What port dimensions should be used for Dayton Audio CFC150-4 to avoid port chuffing?
Sized from cone displacement (Sd × Xmax), a minimum port diameter of 5.0 cm with a length of 38.0 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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