SICA 15 S 3 PL 4 Ohms

15" · 4 Ω · 400 W · 99.9 dB · datasheet ↗

Thiele-Small parameters

Nominal size	15"
Impedance	4 Ω
Fs	38.4 Hz
Qts	0.373
Qes	0.39
Qms	8.32
Vas	163.5 L
Sd	855.3 cm²
Xmax	6.5 mm
Re	3.09 Ω
Bl	14.4 T·m
Mms	107.7 g
Pe	400 W
Sensitivity	99.9 dB

Alignment hint

EBP	98 · flexible
Sealed Vb (Qtc ≈ 0.71)	≈ 63 L

EBP 50-100: works in either a sealed or ported 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
Oberton 15CX	38.2 -0.2	0.349 -0.02	163.8 +0.3	6.8 +0.3	97.8 -2.1	close	8 Ω vs 4 Ω: amp load changes	+
Eminence KAPPA-15LFA	39 +0.6	0.38 +0.01	159 -4.5	5.5 -1	99 -0.9	close	8 Ω vs 4 Ω: amp load changes · Xmax 5.5 mm < 6.5 mm: lower excursion-limited SPL	+
Beyma 15MW/ND v2019	42 +3.6	0.38 +0.01	176 +12.5	6.3 -0.2	99.2 -0.7	close	8 Ω vs 4 Ω: amp load changes · Xmax 6.3 mm < 6.5 mm: lower excursion-limited SPL	+
18 Sound 15ND840	43 +4.6	0.37 =	163 -0.5	9.5 +3	99 -0.9	close	8 Ω vs 4 Ω: amp load changes	+
Faital PRO 15FH520-4	38 -0.4	0.337 -0.04	156.6 -6.9	7.8 +1.3	100.6 +0.7	close		+
P.Audio S15-100LF	38 -0.4	0.35 -0.02	169.1 +5.6	7.8 +1.3	98 -1.9	close	8 Ω vs 4 Ω: amp load changes	+
Oberton 15NMB35	38.93 +0.53	0.335 -0.04	177.47 +13.97	6.75 +0.25	99.5 -0.4	close	8 Ω vs 4 Ω: amp load changes	+
Oberton 15MB500	41.5 +3.1	0.339 -0.03	161.54 -1.96	7.75 +1.25	100 +0.1	close	8 Ω vs 4 Ω: amp load changes	+
Eminence KAPPALITE 3015 LF	42 +3.6	0.387 +0.01	158.8 -4.7	6.4 -0.1	98.3 -1.6	close	8 Ω vs 4 Ω: amp load changes · Xmax 6.4 mm < 6.5 mm: lower excursion-limited SPL	+
18 Sound 15ND940	41 +2.6	0.36 -0.01	166 +2.5	9.5 +3	98.5 -1.4	close	16 Ω vs 4 Ω: amp load changes	+

Compare the closest 3 against the 15 S 3 PL 4 Ohms →

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.