JBL S3-1224

12" · 8 Ω · 500 W · 88.4 dB

Thiele-Small parameters

Nominal size	12"
Impedance	8 Ω
Fs	29.1 Hz
Qts	0.473
Qes	0.58
Qms	2.56
Vas	52.6 L
Sd	530.9 cm²
Xmax	6 mm
Re	4.07 Ω
Bl	17 T·m
Mms	225.2 g
Pe	500 W
Sensitivity	88.4 dB

Alignment hint

EBP	50 · flexible
Sealed Vb (Qtc ≈ 0.71)	≈ 42.6 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 +0.6	0.473 =	52.6 =	6 =	88.7 +0.3	close		+
Monacor SONIC 12 vp	27 -2.1	0.469 =	51 -1.6	6.3 +0.3	88.1 -0.3	close	350 W vs 500 W: lower power handling	+
Infinity 120.3SE	28.4 -0.7	0.475 =	55.6 +3	6.8 +0.8	89.5 +1.1	close	4 Ω vs 8 Ω: amp load changes · 300 W vs 500 W: lower power handling	+
Fountek FW323 - 4 Ohms	30 +0.9	0.452 -0.02	51.4 -1.2	6.6 +0.6	89.7 +1.3	close	4 Ω vs 8 Ω: amp load changes · 350 W vs 500 W: lower power handling	+
JBL GTO 1214	28 -1.1	0.469 =	58.2 +5.6	7.3 +1.3	89.4 +1	close	4 Ω vs 8 Ω: amp load changes · 350 W vs 500 W: lower power handling	+
Pioneer TS-W306DVC	32.9 +3.8	0.478 +0.01	51.8 -0.8	8.3 +2.3	88.9 +0.5	close		+
Monacor BLACKBASS-12 8 Ohms	29 -0.1	0.482 +0.01	61 +8.4	7.5 +1.5	87.1 -1.3	close	300 W vs 500 W: lower power handling	+
Ground Zero GZRW 12XD-AL	29 -0.1	0.451 -0.02	52 -0.6	9.2 +3.2	86.1 -2.3	close		+
Infinity KAPPA 120.9W	27.2 -1.9	0.43 -0.04	54.4 +1.8	6.7 +0.7	87.9 -0.5	close	350 W vs 500 W: lower power handling	+
Focal E30KX	29 -0.1	0.454 -0.02	50 -2.6	10.7 +4.7	86.9 -1.5	close		+

Compare the closest 3 against the S3-1224 →

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.