Vented Specialist

SICA 3 L 0,8 SL - 8

Best box: 1.5 L bass reflex tuned to 123.2 Hz · F3 139.9 Hz

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Comparable 3.0" Drivers

Drivers with similar piston area, resonance and Qts — useful alternatives when the SICA 3 L 0,8 SL - 8 does not fit your target box volume or tuning. Each entry links to its full enclosure design and Thiele/Small parameters.

SICA

3 L 0.8 SL

3.0" · Fs 145.0 Hz · Qts 1.01 · Vas 0.8 L

FaitalPRO

3FE26 (16Ω)

3.0" · Fs 150.0 Hz · Qts 1.08 · Vas 0.9 L

Visaton

FR 8 - 8 Ohm

3.0" · Fs 150.0 Hz · Qts 1.09 · Vas 0.7 L

Visaton

FR 8 - 4 Ohm

3.0" · Fs 150.0 Hz · Qts 1.05 · Vas 0.6 L

GRS

3FR-4 Full-Range 3" Speaker 4 Ohm

3.0" · Fs 145.0 Hz · Qts 0.85 · Vas 0.6 L

HiVi

297-714

3.0" · Fs 130.0 Hz · Qts 0.96 · Vas 0.8 L

Compare them in the same box → Browse all 3.0" drivers → All SICA drivers →

⚠️ Engineering Notice for Builders

Limited linear excursion (Xmax: 1.5 mm); set a high-pass subsonic filter at 25–30 Hz when driven with high power.

Recommended Bass Reflex (Vented)

PORT BUILDABLE

Net Box Volume (Vb)	1.5 Liters
Tuning Frequency (Fb)	123.2 Hz
F3 (-3 dB Cutoff)	139.9 Hz
F6 / F10 Extension	109.9 Hz / 92.0 Hz
Port Inner Diameter	Ø 5.0 cm
Port Physical Length	22.3 cm
First Pipe Resonance	772.0 Hz
Estimated MOL @ F3	100.5 dB SPL

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Sealed (Acoustic Suspension) — compromise

SUITS INFINITE / OPEN BAFFLE

With Qts 1.01 a Butterworth (Qtc 0.707) box would be many times Vas. A box equal to Vas reaches Qtc 1.428; for a flat response this driver is better used on an infinite (IB) or open baffle.

Net Box Volume (Vb)	0.8 Liters
System Q (Qtc)	1.428 (above Butterworth: Qtc cannot fall below Qts (1.01))
System Resonance (Fc)	205.1 Hz
F3 (-3 dB Cutoff)	167.4 Hz
F6 / F10 Extension	143.8 Hz / 119.2 Hz
Air Spring Linearity	High (Zero port compression)

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Thiele/Small Parameters

Resonance (Fs)	145.0 Hz
Total Q (Qts)	1.01
Electrical Q (Qes)	1.271
Mechanical Q (Qms)	4.92

Equivalent Volume (Vas)	0.8 Liters
Diaphragm Area (Sd)	30.2 cm²
DC Resistance (Re)	5.5 Ω
Efficiency Bandwidth Product (EBP)	114.1

Linear Excursion (Xmax)	1.5 mm
Thermal Power (Pe)	20.0 W
Nominal Diameter	3.0"
Catalog Source	Load Forge catalog (manufacturer datasheets and retailer listings)

Frequently Asked Questions

What is the recommended ported (bass reflex) box volume for SICA 3 L 0,8 SL - 8?

Load Forge's calculated alignment puts SICA 3 L 0,8 SL - 8 in a 1.5 liter vented enclosure tuned to 123.2 Hz, reaching an F3 cutoff of approximately 139.9 Hz.

Can SICA 3 L 0,8 SL - 8 be used in a sealed box?

Yes. In a sealed (acoustic suspension) enclosure of 0.8 liters with a Qtc of 1.428 (above Butterworth: Qtc cannot fall below Qts (1.01)), the system exhibits an F3 of 167.4 Hz.

What port dimensions should be used for SICA 3 L 0,8 SL - 8 to avoid port chuffing?

Sized from cone displacement (Sd × Xmax), a minimum port diameter of 5.0 cm with a length of 22.3 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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