SICA 12S2.5PL
Best box: 23.7 L bass reflex tuned to 55.9 Hz · F3 58.8 Hz
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Comparable 12.0" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the SICA 12S2.5PL does not fit your target box volume or tuning. Each entry links to its full enclosure design and Thiele/Small parameters.
Recommended Bass Reflex (Vented)
PORT BUILDABLE| Net Box Volume (Vb) | 23.7 Liters |
| Tuning Frequency (Fb) | 55.9 Hz |
| F3 (-3 dB Cutoff) | 58.8 Hz |
| F6 / F10 Extension | 51.1 Hz / 44.3 Hz |
| Port Inner Diameter | Ø 10.0 cm |
| Port Physical Length | 24.6 cm |
| First Pipe Resonance | 698.0 Hz |
| Estimated MOL @ F3 | 114.4 dB SPL |
Recommended Sealed (Acoustic Suspension)
MAX TRANSIENT DAMPING| Net Box Volume (Vb) | 11.0 Liters |
| System Q (Qtc) | 0.707 (Butterworth) |
| System Resonance (Fc) | 102.8 Hz |
| F3 (-3 dB Cutoff) | 101.6 Hz |
| F6 / F10 Extension | 77.4 Hz / 58.5 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 45.0 Hz |
| Total Q (Qts) | 0.3 |
| Electrical Q (Qes) | 0.324 |
| Mechanical Q (Qms) | 4.0 |
| Equivalent Volume (Vas) | 50.0 Liters |
| Diaphragm Area (Sd) | 530.0 cm² |
| DC Resistance (Re) | 5.6 Ω |
| Efficiency Bandwidth Product (EBP) | 138.8 |
| Linear Excursion (Xmax) | 6.5 mm |
| Thermal Power (Pe) | 300.0 W |
| Nominal Diameter | 12.0" |
| Catalog Source | Load Forge catalog (manufacturer datasheets and retailer listings) |
Frequently Asked Questions
What is the recommended ported (bass reflex) box volume for SICA 12S2.5PL?
Load Forge's calculated alignment puts SICA 12S2.5PL in a 23.7 liter vented enclosure tuned to 55.9 Hz, reaching an F3 cutoff of approximately 58.8 Hz.
Can SICA 12S2.5PL be used in a sealed box?
Yes. In a sealed (acoustic suspension) enclosure of 11.0 liters with a Qtc of 0.707 (Butterworth), the system exhibits an F3 of 101.6 Hz.
What port dimensions should be used for SICA 12S2.5PL to avoid port chuffing?
Sized from cone displacement (Sd × Xmax), a minimum port diameter of 10.0 cm with a length of 24.6 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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