SICA C 15 K
Best box: 60.6 L bass reflex tuned to 60.4 Hz · F3 82.3 Hz
Open and tweak this box live ↗
Will it fit your requirements?
Check the SICA C 15 K against your space and targets — instant, no sign-up.
Estimated retail 157.50 EUR · Check price & availability ↗
Free, no sign-up to simulate · a free account saves your design
Comparable 14.0" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the SICA C 15 K 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
- Xmax is not published, so the port size is an empirical estimate (area ≥ 12 in² per ft³ of net volume, minimum by driver size), not a displacement calculation. Check air velocity in Load Forge Studio.
Recommended Bass Reflex (Vented)
PORT BUILDABLE| Net Box Volume (Vb) | 60.6 Liters |
| Tuning Frequency (Fb) | 60.4 Hz |
| F3 (-3 dB Cutoff) | 82.3 Hz |
| F6 / F10 Extension | 69.0 Hz / 53.7 Hz |
| Port Inner Diameter ESTIMATED | Ø 15.0 cm |
| Port Physical Length | 13.2 cm |
| First Pipe Resonance | 1300.0 Hz |
| Estimated MOL @ F3 | 117.0 dB SPL |
Sealed (Acoustic Suspension) — compromise
SUITS INFINITE / OPEN BAFFLEWith Qts 0.75 a Butterworth (Qtc 0.707) box would be many times Vas. A box equal to Vas reaches Qtc 1.061; for a flat response this driver is better used on an infinite (IB) or open baffle.
| Net Box Volume (Vb) | 75.8 Liters |
| System Q (Qtc) | 1.061 (above Butterworth: Qtc cannot fall below Qts (0.75)) |
| System Resonance (Fc) | 100.4 Hz |
| F3 (-3 dB Cutoff) | 78.1 Hz |
| F6 / F10 Extension | 64.7 Hz / 52.1 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 71.0 Hz |
| Total Q (Qts) | 0.75 |
| Electrical Q (Qes) | 0.808 |
| Mechanical Q (Qms) | 10.4 |
| Equivalent Volume (Vas) | 75.8 Liters |
| Diaphragm Area (Sd) | 754.8 cm² |
| DC Resistance (Re) | 6.85 Ω |
| Efficiency Bandwidth Product (EBP) | 87.8 |
| Linear Excursion (Xmax) | N/A mm |
| Thermal Power (Pe) | 100.0 W |
| Nominal Diameter | 14.0" |
| Catalog Source | Load Forge catalog (manufacturer datasheets and retailer listings) |
Frequently Asked Questions
What is the recommended ported (bass reflex) box volume for SICA C 15 K?
Load Forge's calculated alignment puts SICA C 15 K in a 60.6 liter vented enclosure tuned to 60.4 Hz, reaching an F3 cutoff of approximately 82.3 Hz.
Can SICA C 15 K be used in a sealed box?
Yes. In a sealed (acoustic suspension) enclosure of 75.8 liters with a Qtc of 1.061 (above Butterworth: Qtc cannot fall below Qts (0.75)), the system exhibits an F3 of 78.1 Hz.
What port dimensions should be used for SICA C 15 K to avoid port chuffing?
Xmax is not published for SICA C 15 K, so the port is an empirical estimate: a 15.0 cm diameter with a length of 13.2 cm (area at least 12 in² per ft³ of net volume). Check the air velocity at your power level in 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.
Not sure if C 15 K fits your physical space?
Don't force a driver into the wrong box. Use Bass Match to calculate which of 8,000+ catalog drivers delivers the highest SPL, lowest F3, and cleanest port air velocity for your exact trunk or room dimensions.
Run Bass Match for Your Space