JBL P1220

12" · 2 Ω · 400 W · 91.8 dB

Thiele-Small parameters

Nominal size	12"
Impedance	2 Ω
Fs	28.7 Hz
Qts	0.448
Qes	0.48
Qms	6.71
Vas	47.4 L
Sd	482 cm²
Xmax	7.8 mm
Re	1.95 Ω
Bl	12.5 T·m
Mms	212 g
Pe	400 W
Sensitivity	91.8 dB

Alignment hint

EBP	60 · flexible
Sealed Vb (Qtc ≈ 0.71)	≈ 31.8 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
Alpine 1242D	29 +0.3	0.47 +0.02	45 -2.4	9.1 +1.3	91.4 -0.4	close	4 Ω vs 2 Ω: amp load changes	+
DD Audio REDLINE 700 SERIES	28.3 -0.4	0.434 -0.01	39.6 -7.8	7 -0.8	90.7 -1.1	close	4 Ω vs 2 Ω: amp load changes · Xmax 7 mm < 7.8 mm: lower excursion-limited SPL	+
Fountek FW323 - 4 Ohms	30 +1.3	0.452 =	51.4 +4	6.6 -1.2	89.7 -2.1	close	4 Ω vs 2 Ω: amp load changes · Xmax 6.6 mm < 7.8 mm: lower excursion-limited SPL	+
Focal P30DB	29.4 +0.7	0.427 -0.02	56.8 +9.4	7.7 -0.1	93.7 +1.9	close	Xmax 7.7 mm < 7.8 mm: lower excursion-limited SPL	+
Alpine SWR-12D2 vp	27 -1.7	0.441 -0.01	46 -1.4	10 +2.2	87.8 -4	close	8 Ω vs 2 Ω: amp load changes	+
Focal E30KX	29 +0.3	0.454 +0.01	50 +2.6	10.7 +2.9	86.9 -4.9	close	8 Ω vs 2 Ω: amp load changes	+
Focal SUB30KXE	29 +0.3	0.454 +0.01	50 +2.6	10.8 +3	86.9 -4.9	close	8 Ω vs 2 Ω: amp load changes	+
Dayton Audio TS320D-4 TITANIC MK 4	28.3 -0.4	0.453 +0.01	64.1 +16.7	9.8 +2	90.7 -1.1	close	4 Ω vs 2 Ω: amp load changes	+
Ground Zero GZRW 12XS-AL	30 +1.3	0.395 -0.05	52 +4.6	8.9 +1.1	90.4 -1.4	close	4 Ω vs 2 Ω: amp load changes	+
Celestion FTR12-4080DL/4	35.3 +6.6	0.428 -0.02	51.4 +4	8 +0.2	92.5 +0.7	close	4 Ω vs 2 Ω: amp load changes	+

Compare the closest 3 against the P1220 →

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.