JL Audio 12W1-4

12" · 4 Ω · 125 W · 87.6 dB · datasheet ↗

Thiele-Small parameters

Nominal size	12"
Impedance	4 Ω
Fs	22.3 Hz
Qts	0.487
Qes	0.518
Qms	8.255
Vas	176.214 L
Sd	506 cm²
Xmax	7.874 mm
Re	3.65 Ω
Bl	10.19 T·m
Mms	105.2 g
Pe	125 W
Sensitivity	87.6 dB

Alignment hint

EBP	43 · sealed
Sealed Vb (Qtc ≈ 0.71)	≈ 159 L

EBP < 50: favours a sealed (closed) 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
JL Audio 12W1-8	24 +1.7	0.49 =	177.29 +1.08	7.874 =	88.6 +1	close	8 Ω vs 4 Ω: amp load changes	+
SB Acoustics SB34NRX75-6 vp fx	22.9 +0.6	0.496 +0.01	181.3 +5.09	11 +3.13	90.6 +3	close	8 Ω vs 4 Ω: amp load changes	+
Peerless XXLS-830845	21.5 -0.8	0.448 -0.04	162.5 -13.71	7.6 -0.27	88.7 +1.1	close	8 Ω vs 4 Ω: amp load changes · Xmax 7.6 mm < 7.874 mm: lower excursion-limited SPL	+
Peerless XXLS308 SWR 51	21.5 -0.8	0.448 -0.04	162.5 -13.71	11.5 +3.63	88.7 +1.1	close	8 Ω vs 4 Ω: amp load changes	+
JL Audio 12W0-8	23.2 +0.9	0.426 -0.06	159.989 -16.22	8.636 +0.76	88.3 +0.7	close	8 Ω vs 4 Ω: amp load changes	+
AE Speakers SBP12-8	23.6 +1.3	0.479 -0.01	160 -16.21	14 +6.13	89.5 +1.9	close	8 Ω vs 4 Ω: amp load changes	+
Ground Zero GZTW 12MK2 vp	22.5 +0.2	0.484 =	148.6 -27.61	14.7 +6.83	89.9 +2.3	close	8 Ω vs 4 Ω: amp load changes	+
Rockford Fosgate R1S4-12	22 -0.3	0.493 +0.01	197.2 +20.99	7 -0.87	91.5 +3.9	close	Xmax 7 mm < 7.874 mm: lower excursion-limited SPL	+
Siare 31SPCS	22 -0.3	0.494 +0.01	212 +35.79	6 -1.87	89 +1.4	close	8 Ω vs 4 Ω: amp load changes · Xmax 6 mm < 7.874 mm: lower excursion-limited SPL	+
NHT 1259	19 -3.3	0.461 -0.03	190 +13.79	12 +4.13	89.4 +1.8	usable		+

Compare the closest 3 against the 12W1-4 →

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.