Kicker 51CWQ104
Best box: 26.0 L bass reflex tuned to 30.5 Hz · F3 28.5 Hz
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Comparable 10.0" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the Kicker 51CWQ104 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
- The textbook alignment (22.6 L at 30.5 Hz) would need a 104.8 cm port; the recommendation is retuned to 26.0 L at 30.5 Hz so the port can be built.
- Port length (90.2 cm) exceeds a straight internal run; use an elbow bend, slotted vent or 3D folded duct to fit the enclosure.
Recommended Bass Reflex (Vented)
PORT NEEDS ELBOW / 3D| Net Box Volume (Vb) | 26.0 Liters |
| Tuning Frequency (Fb) | 30.5 Hz |
| F3 (-3 dB Cutoff) | 28.5 Hz |
| F6 / F10 Extension | 25.5 Hz / 22.9 Hz |
| Port Inner Diameter | Ø 10.0 cm |
| Port Physical Length | 90.2 cm |
| First Pipe Resonance | 191.0 Hz |
| Estimated MOL @ F3 | 113.0 dB SPL |
Recommended Sealed (Acoustic Suspension)
MAX TRANSIENT DAMPING| Net Box Volume (Vb) | 13.2 Liters |
| System Q (Qtc) | 0.707 (Butterworth) |
| System Resonance (Fc) | 54.7 Hz |
| F3 (-3 dB Cutoff) | 57.2 Hz |
| F6 / F10 Extension | 42.9 Hz / 32.2 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 37.7 Hz |
| Total Q (Qts) | 0.483 |
| Electrical Q (Qes) | 0.507 |
| Mechanical Q (Qms) | 10.37 |
| Equivalent Volume (Vas) | 15.1 Liters |
| Diaphragm Area (Sd) | 346.4 cm² |
| DC Resistance (Re) | 7.22 Ω |
| Efficiency Bandwidth Product (EBP) | 74.3 |
| Linear Excursion (Xmax) | 19.7 mm |
| Thermal Power (Pe) | 1600.0 W |
| Nominal Diameter | 10.0" |
| Catalog Source | Load Forge catalog (manufacturer datasheets and retailer listings) |
Frequently Asked Questions
What is the recommended ported (bass reflex) box volume for Kicker 51CWQ104?
Load Forge's calculated alignment puts Kicker 51CWQ104 in a 26.0 liter vented enclosure tuned to 30.5 Hz, reaching an F3 cutoff of approximately 28.5 Hz.
Can Kicker 51CWQ104 be used in a sealed box?
Yes. In a sealed (acoustic suspension) enclosure of 13.2 liters with a Qtc of 0.707 (Butterworth), the system exhibits an F3 of 57.2 Hz.
What port dimensions should be used for Kicker 51CWQ104 to avoid port chuffing?
Sized from cone displacement (Sd × Xmax), a minimum port diameter of 10.0 cm with a length of 90.2 cm is suggested; check the port air velocity at your drive level in the Load Forge Studio.
Shareable Acoustic Card for Forums & Social Media
Embed this design card on DIYAudio, AVSForum, Reddit, or Facebook. It shows the calculated F3, MOL (when the power rating is published) and box parameters.
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