SICA 12 S 4 PL - 8
Best box: 16.0 L bass reflex tuned to 68.0 Hz · F3 69.7 Hz
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Comparable 12.0" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the SICA 12 S 4 PL - 8 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 (16.0 L at 59.1 Hz) would need a 56.9 cm port; the recommendation is retuned to 16.0 L at 68.0 Hz so the port can be built.
Recommended Bass Reflex (Vented)
PORT BUILDABLE| Net Box Volume (Vb) | 16.0 Liters |
| Tuning Frequency (Fb) | 68.0 Hz |
| F3 (-3 dB Cutoff) | 69.7 Hz |
| F6 / F10 Extension | 61.8 Hz / 54.0 Hz |
| Port Inner Diameter | Ø 12.5 cm |
| Port Physical Length | 40.8 cm |
| First Pipe Resonance | 422.0 Hz |
| Estimated MOL @ F3 | 120.3 dB SPL |
Recommended Sealed (Acoustic Suspension)
MAX TRANSIENT DAMPING| Net Box Volume (Vb) | 8.1 Liters |
| System Q (Qtc) | 0.707 (Butterworth) |
| System Resonance (Fc) | 111.1 Hz |
| F3 (-3 dB Cutoff) | 108.5 Hz |
| F6 / F10 Extension | 82.5 Hz / 62.2 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 40.4 Hz |
| Total Q (Qts) | 0.25 |
| Electrical Q (Qes) | 0.265 |
| Mechanical Q (Qms) | 4.5 |
| Equivalent Volume (Vas) | 57.0 Liters |
| Diaphragm Area (Sd) | 530.9 cm² |
| DC Resistance (Re) | 5.2 Ω |
| Efficiency Bandwidth Product (EBP) | 152.6 |
| Linear Excursion (Xmax) | 7.5 mm |
| Thermal Power (Pe) | 1000.0 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 12 S 4 PL - 8?
Load Forge's calculated alignment puts SICA 12 S 4 PL - 8 in a 16.0 liter vented enclosure tuned to 68.0 Hz, reaching an F3 cutoff of approximately 69.7 Hz.
Can SICA 12 S 4 PL - 8 be used in a sealed box?
Yes. In a sealed (acoustic suspension) enclosure of 8.1 liters with a Qtc of 0.707 (Butterworth), the system exhibits an F3 of 108.5 Hz.
What port dimensions should be used for SICA 12 S 4 PL - 8 to avoid port chuffing?
Sized from cone displacement (Sd × Xmax), a minimum port diameter of 12.5 cm with a length of 40.8 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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