JBL 2043G

18" · 4 Ω · 350 W · 101.7 dB

Thiele-Small parameters

Nominal size	18"
Impedance	4 Ω
Fs	31 Hz
Qts	0.343
Qes	0.36
Qms	7.3
Vas	384 L
Sd	1270 cm²
Xmax	6.6 mm
Re	2.7 Ω
Bl	15.1 T·m
Mms	155.2 g
Pe	350 W
Sensitivity	101.7 dB

Alignment hint

EBP	86 · flexible
Sealed Vb (Qtc ≈ 0.71)	≈ 118.2 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
Eminence KAPPA PRO 18 LF-8	32 +1	0.329 -0.01	391 +7	8 +1.4	99.5 -2.2	close	8 Ω vs 4 Ω: amp load changes	+
Faital PRO 18FH500 v2016	30 -1	0.35 +0.01	374.8 -9.2	9.2 +2.6	98.4 -3.3	close	8 Ω vs 4 Ω: amp load changes	+
Eminence Kappa Pro 18LF2	32 +1	0.33 -0.01	391.61 +7.61	8 +1.4	98 -3.7	close	8 Ω vs 4 Ω: amp load changes	+
Faital PRO 18FH500	30 -1	0.35 +0.01	417.9 +33.9	9.25 +2.65	99 -2.7	close	8 Ω vs 4 Ω: amp load changes	+
Monacor SP-18/600FH	30 -1	0.327 -0.02	404 +20	9.3 +2.7	99 -2.7	close	8 Ω vs 4 Ω: amp load changes	+
JBL 2268H	33 +2	0.354 +0.01	328 -56	8 +1.4	98.6 -3.1	close	8 Ω vs 4 Ω: amp load changes	+
Beyma 18GT200 v2	30 -1	0.322 -0.02	355 -29	6 -0.6	97.9 -3.8	close	8 Ω vs 4 Ω: amp load changes · 250 W vs 350 W: lower power handling · Xmax 6 mm < 6.6 mm: lower excursion-limited SPL	+
Dayton Audio PA460-8 v2015	28.3 -2.7	0.33 -0.01	402 +18	6 -0.6	97.8 -3.9	close	8 Ω vs 4 Ω: amp load changes · Xmax 6 mm < 6.6 mm: lower excursion-limited SPL	+
18 Sound 18W1300	35 +4	0.33 -0.01	336 -48	8.5 +1.9	99.5 -2.2	close	8 Ω vs 4 Ω: amp load changes	+
PHL Audio 7080	33 +2	0.347 =	315 -69	8 +1.4	98.3 -3.4	usable	8 Ω vs 4 Ω: amp load changes	+

Compare the closest 3 against the 2043G →

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.