SICA 15 N 3 PL
Best box: 53.0 L sealed · Fc 83.6 Hz · F3 84.2 Hz
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Comparable 15.0" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the SICA 15 N 3 PL 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
- Straight vent would be 560.0 cm long: not physically buildable as a simple tube. Use a passive radiator, a folded slot port or model a 3D folded duct in Load Forge Studio.
- Large enclosure volume (121.4 L) requires extensive internal matrix bracing to prevent panel resonance.
Textbook Bass Reflex — not recommended
PORT NOT BUILDABLE| Net Box Volume (Vb) | 121.4 Liters |
| Tuning Frequency (Fb) | 48.2 Hz |
| F3 (-3 dB Cutoff) | 46.1 Hz |
| F6 / F10 Extension | 41.3 Hz / 36.5 Hz |
| Port Inner Diameter | Ø 86.3 cm |
| Port Physical Length | 560.0 cm |
| First Pipe Resonance | 31.0 Hz |
| Estimated MOL @ F3 | 119.8 dB SPL |
Recommended Sealed (Acoustic Suspension)
MAX TRANSIENT DAMPING| Net Box Volume (Vb) | 53.0 Liters |
| System Q (Qtc) | 0.707 (Butterworth) |
| System Resonance (Fc) | 83.6 Hz |
| F3 (-3 dB Cutoff) | 84.2 Hz |
| F6 / F10 Extension | 63.6 Hz / 47.9 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 46.9 Hz |
| Total Q (Qts) | 0.37 |
| Electrical Q (Qes) | 0.382 |
| Mechanical Q (Qms) | 11.89 |
| Equivalent Volume (Vas) | 140.4 Liters |
| Diaphragm Area (Sd) | 855.3 cm² |
| DC Resistance (Re) | 5.1 Ω |
| Efficiency Bandwidth Product (EBP) | 122.8 |
| Linear Excursion (Xmax) | 388.0 mm |
| Thermal Power (Pe) | 400.0 W |
| Nominal Diameter | 15.0" |
| Catalog Source | Load Forge catalog (manufacturer datasheets and retailer listings) |
Frequently Asked Questions
What is the recommended ported (bass reflex) box volume for SICA 15 N 3 PL?
A simple ported box is not recommended for SICA 15 N 3 PL: the textbook alignment (121.4 liters tuned to 48.2 Hz) needs a 560.0 cm port, and no nearby retune stays buildable without a bass hump. A sealed box, a passive radiator or a folded duct is the practical choice.
Can SICA 15 N 3 PL be used in a sealed box?
Yes. In a sealed (acoustic suspension) enclosure of 53.0 liters with a Qtc of 0.707 (Butterworth), the system exhibits an F3 of 84.2 Hz.
What port dimensions should be used for SICA 15 N 3 PL to avoid port chuffing?
A straight 86.3 cm port would need 560.0 cm of length, which does not fit a practical cabinet. Use a passive radiator or a folded/3D duct instead of a straight tube.
Shareable Acoustic Card for Forums & Social Media
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