SICA 12D1.5CS-4

12" · 4 Ω · 100 W · 97.7 dB · datasheet ↗

Thiele-Small parameters

Nominal size	12"
Impedance	4 Ω
Fs	58.1 Hz
Qts	0.47
Qes	0.48
Qms	17.8
Vas	94.8 L
Sd	488 cm²
Xmax	0.5 mm
Re	3.6 Ω
Bl	8.6 T·m
Mms	26.7 g
Pe	100 W
Sensitivity	97.7 dB

Alignment hint

EBP	121 · ported
Sealed Vb (Qtc ≈ 0.71)	≈ 75 L

EBP > 100: favours a ported (bass-reflex) alignment.

Rules of thumb from T/S parameters only. Verify against a real simulation before cutting wood.

Substitute candidates

Driver	Fs (Hz)	Qts	Vas (L)	Xmax (mm)	Sens (dB)	Fit	Notes	Compare
SICA 12 D 1.5 CS 4 Ohms	58.1 =	0.467 =	94.8 =	0.5 =	101.3 +3.6	close		+
Eminence DELTA 12B	58 -0.1	0.48 +0.01	87 -7.8	2.7 +2.2	98.3 +0.6	close	16 Ω vs 4 Ω: amp load changes	+
Eminence DELTA 12B	58 -0.1	0.48 +0.01	87 -7.8	2.7 +2.2	97 -0.7	close	16 Ω vs 4 Ω: amp load changes	+
Samy Speaker CX-12AW200G	55 -3.1	0.438 -0.03	95.6 +0.8	2.5 +2	98.9 +1.2	usable	8 Ω vs 4 Ω: amp load changes	+
B&C 12 HPL 51	51 -7.1	0.479 +0.01	96 +1.2	4 +3.5	97.3 -0.4	usable	8 Ω vs 4 Ω: amp load changes	+
Audax PR300T2	51 -7.1	0.497 +0.03	97 +2.2	2 +1.5	99.4 +1.7	usable		+
Celestion TF 1220	55 -3.1	0.416 -0.05	84.7 -10.1	2 +1.5	98.4 +0.7	usable	8 Ω vs 4 Ω: amp load changes	+
Philips AD12100 vp N°1	55.7 -2.4	0.475 +0.01	80.1 -14.7	3 +2.5	99.3 +1.6	usable		+
Great Plains Audio 212-8A GPA	51.2 -6.9	0.459 -0.01	106.4 +11.6	3 +2.5	98.1 +0.4	usable	8 Ω vs 4 Ω: amp load changes	+
Celestion TF 1218TC	56 -2.1	0.408 -0.06	80.2 -14.6	1.5 +1	98.4 +0.7	usable	8 Ω vs 4 Ω: amp load changes	+

Compare the closest 3 against the 12D1.5CS-4 →

Ranked on parameter similarity only (Qts, Fs, Vas, Xmax, sensitivity). Same nominal size required. A hint, not a simulation, model the swap before cutting or buying.

Used in enclosures (0)

No enclosure in the catalog uses this driver yet.