Fountek FW323 - 4 Ohms

12" · 4 Ω · 350 W · 89.7 dB · datasheet ↗

Thiele-Small parameters

Nominal size	12"
Impedance	4 Ω
Fs	30 Hz
Qts	0.452
Qes	0.558
Qms	2.369
Vas	51.4 L
Sd	491 cm²
Xmax	6.6 mm
Re	3.4 Ω
Bl	14.6 T·m
Mms	185 g
Pe	350 W
Sensitivity	89.7 dB

Alignment hint

EBP	54 · flexible
Sealed Vb (Qtc ≈ 0.71)	≈ 35.5 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
JBL STADIUM 1224	29.7 -0.3	0.473 +0.02	52.6 +1.2	6 -0.6	88.7 -1	close	8 Ω vs 4 Ω: amp load changes · Xmax 6 mm < 6.6 mm: lower excursion-limited SPL	+
Infinity 120.3SE	28.4 -1.6	0.475 +0.02	55.6 +4.2	6.8 +0.2	89.5 -0.2	close		+
JBL S3-1224	29.1 -0.9	0.473 +0.02	52.6 +1.2	6 -0.6	88.4 -1.3	close	8 Ω vs 4 Ω: amp load changes · Xmax 6 mm < 6.6 mm: lower excursion-limited SPL	+
Pioneer TS-W306DVC	32.9 +2.9	0.478 +0.03	51.8 +0.4	8.3 +1.7	88.9 -0.8	close	8 Ω vs 4 Ω: amp load changes	+
JBL GTO 1214	28 -2	0.469 +0.02	58.2 +6.8	7.3 +0.7	89.4 -0.3	close		+
JBL P1220	28.7 -1.3	0.448 =	47.4 -4	7.8 +1.2	91.8 +2.1	close	2 Ω vs 4 Ω: amp load changes	+
Ground Zero GZRW 12XS-AL	30 =	0.395 -0.06	52 +0.6	8.9 +2.3	90.4 +0.7	close		+
Monacor SONIC 12 vp	27 -3	0.469 +0.02	51 -0.4	6.3 -0.3	88.1 -1.6	close	8 Ω vs 4 Ω: amp load changes · Xmax 6.3 mm < 6.6 mm: lower excursion-limited SPL	+
Ground Zero GZRW 12XD-AL	29 -1	0.451 =	52 +0.6	9.2 +2.6	86.1 -3.6	close	8 Ω vs 4 Ω: amp load changes	+
Focal E30KX	29 -1	0.454 =	50 -1.4	10.7 +4.1	86.9 -2.8	close	8 Ω vs 4 Ω: amp load changes	+

Compare the closest 3 against the FW323 - 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.