JBL 2042H

18" · 8 Ω · 500 W · 101.3 dB

Thiele-Small parameters

Nominal size	18"
Impedance	8 Ω
Fs	39 Hz
Qts	0.404
Qes	0.44
Qms	5
Vas	337 L
Sd	1270 cm²
Xmax	7.1 mm
Re	4.3 Ω
Bl	16.4 T·m
Mms	111.7 g
Pe	500 W
Sensitivity	101.3 dB

Alignment hint

EBP	89 · flexible
Sealed Vb (Qtc ≈ 0.71)	≈ 163.3 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 2241G	35 -4	0.4 =	310 -27	7.5 +0.4	101.9 +0.6	close	4 Ω vs 8 Ω: amp load changes	+
JBL 2241H	35 -4	0.4 =	310 -27	7.6 +0.5	98.9 -2.4	close		+
DAS Audio S1846 vp1	36.3 -2.7	0.403 =	389.4 +52.4	8 +0.9	98.7 -2.6	close		+
Peavey 1801-4	37.3 -1.7	0.448 +0.04	335.6 -1.4	5 -2.1	101 -0.3	close	4 Ω vs 8 Ω: amp load changes · 350 W vs 500 W: lower power handling · Xmax 5 mm < 7.1 mm: lower excursion-limited SPL	+
18 Sound 18W1300	35 -4	0.33 -0.07	336 -1	8.5 +1.4	99.5 -1.8	usable		+
Beyma 18G400	36 -3	0.374 -0.03	300 -37	6 -1.1	99.2 -2.1	usable	Xmax 6 mm < 7.1 mm: lower excursion-limited SPL	+
Peavey 1801-4 v1993	40.6 +1.6	0.464 +0.06	330 -7	5 -2.1	102.1 +0.8	usable	4 Ω vs 8 Ω: amp load changes · 350 W vs 500 W: lower power handling · Xmax 5 mm < 7.1 mm: lower excursion-limited SPL	+
PD 184C002	40 +1	0.339 -0.06	268 -69	8.5 +1.4	100.6 -0.7	usable		+
Precision Devices 184C002	40 +1	0.339 -0.06	268 -69	8.5 +1.4	100.6 -0.7	usable		+
Beyma 18G40	31 -8	0.407 =	323 -14	7 -0.1	96.9 -4.4	usable	Xmax 7 mm < 7.1 mm: lower excursion-limited SPL	+

Compare the closest 3 against the 2042H →

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.