American Bass SL 124

12" · 4 Ω · 250 W · 88.3 dB · datasheet ↗

Thiele-Small parameters

Nominal size	12"
Impedance	4 Ω
Fs	31.5 Hz
Qts	0.543
Qes	0.61
Qms	5.295
Vas	85.7 L
Sd	491 cm²
Xmax	8.5 mm
Re	3.44 Ω
Bl	10.65 T·m
Mms	101.7 g
Pe	250 W
Sensitivity	88.3 dB

Alignment hint

EBP	52 · flexible
Sealed Vb (Qtc ≈ 0.71)	≈ 123.2 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
Hertz Audio DS 30.3	29 -2.5	0.51 -0.03	94 +8.3	9 +0.5	87.7 -0.6	close		+
Alpine SWE-1244E	31 -0.5	0.53 -0.01	102.5 +16.8	7.5 -1	88.7 +0.4	close	Xmax 7.5 mm < 8.5 mm: lower excursion-limited SPL	+
Oxygen SPIRAL 300	32 +0.5	0.56 +0.02	81 -4.7	7.6 -0.9	92 +3.7	close	Xmax 7.6 mm < 8.5 mm: lower excursion-limited SPL	+
Sound Storm Labs CR12D	30.7 -0.8	0.522 -0.02	66.9 -18.8	10.3 +1.8	87.5 -0.8	close	8 Ω vs 4 Ω: amp load changes	+
Pyle Audio PLPW12D	32.9 +1.4	0.534 -0.01	84.1 -1.6	6 -2.5	89.4 +1.1	close	8 Ω vs 4 Ω: amp load changes · Xmax 6 mm < 8.5 mm: lower excursion-limited SPL	+
Infinity PRIMUS 1270	29.7 -1.8	0.49 -0.05	75.7 -10	11.3 +2.8	87.3 -1	close		+
JL Audio 12WX-4	27 -4.5	0.562 +0.02	94.5 +8.8	8.5 =	90.5 +2.2	close		+
Morel PRIMO 124	28 -3.5	0.47 -0.07	85 -0.7	8 -0.5	87.1 -1.2	close	Xmax 8 mm < 8.5 mm: lower excursion-limited SPL	+
Powerbass S-1204D	31 -0.5	0.5 -0.04	65 -20.7	9.5 +1	87.2 -1.1	close		+
Phoenix Gold RYVAL V12D	30 -1.5	0.552 +0.01	81.9 -3.8	6.4 -2.1	91.4 +3.1	usable	150 W vs 250 W: lower power handling · Xmax 6.4 mm < 8.5 mm: lower excursion-limited SPL	+

Compare the closest 3 against the SL 124 →

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.