SICA N 12/65 TR STEALTH
Best box: 34.8 L bass reflex tuned to 70.7 Hz · F3 101.2 Hz
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Comparable 12.0" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the SICA N 12/65 TR STEALTH 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) | 34.8 Liters |
| Tuning Frequency (Fb) | 70.7 Hz |
| F3 (-3 dB Cutoff) | 101.2 Hz |
| F6 / F10 Extension | 87.1 Hz / 69.5 Hz |
| Port Inner Diameter ESTIMATED | Ø 12.5 cm |
| Port Physical Length | 12.2 cm |
| First Pipe Resonance | 1409.0 Hz |
| Estimated MOL @ F3 | 115.4 dB SPL |
Sealed (Acoustic Suspension) — compromise
SUITS INFINITE / OPEN BAFFLEWith Qts 0.95 a Butterworth (Qtc 0.707) box would be many times Vas. A box equal to Vas reaches Qtc 1.344; for a flat response this driver is better used on an infinite (IB) or open baffle.
| Net Box Volume (Vb) | 43.5 Liters |
| System Q (Qtc) | 1.344 (above Butterworth: Qtc cannot fall below Qts (0.95)) |
| System Resonance (Fc) | 117.7 Hz |
| F3 (-3 dB Cutoff) | 90.3 Hz |
| F6 / F10 Extension | 77.1 Hz / 63.5 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 83.2 Hz |
| Total Q (Qts) | 0.95 |
| Electrical Q (Qes) | 1.038 |
| Mechanical Q (Qms) | 11.18 |
| Equivalent Volume (Vas) | 43.5 Liters |
| Diaphragm Area (Sd) | 490.9 cm² |
| DC Resistance (Re) | 6.16 Ω |
| Efficiency Bandwidth Product (EBP) | 80.1 |
| Linear Excursion (Xmax) | N/A mm |
| Thermal Power (Pe) | 65.0 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 N 12/65 TR STEALTH?
Load Forge's calculated alignment puts SICA N 12/65 TR STEALTH in a 34.8 liter vented enclosure tuned to 70.7 Hz, reaching an F3 cutoff of approximately 101.2 Hz.
Can SICA N 12/65 TR STEALTH be used in a sealed box?
Yes. In a sealed (acoustic suspension) enclosure of 43.5 liters with a Qtc of 1.344 (above Butterworth: Qtc cannot fall below Qts (0.95)), the system exhibits an F3 of 90.3 Hz.
What port dimensions should be used for SICA N 12/65 TR STEALTH to avoid port chuffing?
Xmax is not published for SICA N 12/65 TR STEALTH, so the port is an empirical estimate: a 12.5 cm diameter with a length of 12.2 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
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