Sica 12 SR 4 CP

12" · 8 Ω · 1000 W · 92.6 dB · datasheet ↗

Thiele-Small parameters

Nominal size	12"
Impedance	8 Ω
Fs	38 Hz
Qts	0.3
Qes	0.31
Qms	4.78
Vas	41.7 L
Sd	490.9 cm²
Xmax	9 mm
Re	5.2 Ω
Bl	24 T·m
Mms	144.6 g
Pe	1000 W
Sensitivity	92.6 dB

Alignment hint

EBP	123 · ported
Sealed Vb (Qtc ≈ 0.71)	≈ 9.2 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
B&C 12BG100	39 +1	0.33 +0.03	41 -0.7	10.5 +1.5	93 +0.4	close		+
B&C 12 BG 100	39 +1	0.333 +0.03	41 -0.7	7.8 -1.2	92.4 -0.2	close	Xmax 7.8 mm < 9 mm: lower excursion-limited SPL	+
Soundstream SPLX-122	35 -3	0.322 +0.02	40.2 -1.5	8 -1	92 -0.6	close	750 W vs 1000 W: lower power handling · Xmax 8 mm < 9 mm: lower excursion-limited SPL	+
Eminence DEFINIMAX 4012ULF-8	40 +2	0.31 +0.01	41.342 -0.36	6.7 -2.3	91 -1.6	close	Xmax 6.7 mm < 9 mm: lower excursion-limited SPL	+
Sica 12 PNS 4	41.7 +3.7	0.31 +0.01	50.2 +8.5	9.5 +0.5	94.5 +1.9	close		+
Faital PRO 12RS550	42 +4	0.37 +0.07	45.4 +3.7	9.25 +0.25	93 +0.4	usable	500 W vs 1000 W: lower power handling	+
B&C 12SW115	38 =	0.25 -0.05	34 -7.7	13.5 +4.5	92.5 -0.1	usable		+
Faital PRO 12HP1030	45 +7	0.3 =	35.9 -5.8	12.45 +3.45	95 +2.4	usable		+
B&C 12PS100	44 +6	0.27 -0.03	47 +5.3	8 -1	93 +0.4	usable	700 W vs 1000 W: lower power handling · Xmax 8 mm < 9 mm: lower excursion-limited SPL	+
Beyma 12LEX1000Fe	49 +11	0.3 =	38.4 -3.3	11 +2	95 +2.4	usable		+

Compare the closest 3 against the 12 SR 4 CP →

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.