JBL 2243H

18" · 8 Ω · 300 W · 100.4 dB

Thiele-Small parameters

Nominal size	18"
Impedance	8 Ω
Fs	30 Hz
Qts	0.192
Qes	0.2
Qms	5
Vas	338.1 L
Sd	1240 cm²
Xmax	4.3 mm
Re	5.2 Ω
Bl	29.7 T·m
Mms	179.4 g
Pe	300 W
Sensitivity	100.4 dB

Alignment hint

EBP	150 · ported
Sealed Vb (Qtc ≈ 0.71)	≈ 26.9 L

EBP > 100: favours a ported (bass-reflex) 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
Fane COLOSSUS 18B	30.5 +0.5	0.197 +0.01	320 -18.1	4 -0.3	99.4 -1	close	Xmax 4 mm < 4.3 mm: lower excursion-limited SPL	+
Celestion BX18-4085	30 =	0.2 +0.01	337 -1.1	3.4 -0.9	99.8 -0.6	close	150 W vs 300 W: lower power handling · Xmax 3.4 mm < 4.3 mm: lower excursion-limited SPL	+
JBL E155-8	30 =	0.2 +0.01	424.8 +86.7	5.1 +0.8	100.4 =	close		+
Fane COLOSSUS 18 BASS	28 -2	0.188 =	366 +27.9	3.8 -0.5	99.2 -1.2	close	200 W vs 300 W: lower power handling · Xmax 3.8 mm < 4.3 mm: lower excursion-limited SPL	+
PD PD 184C01	30 =	0.227 +0.04	337.1 -1	7.8 +3.5	100.2 -0.2	close		+
Precision Devices PD 184C01	30 =	0.227 +0.04	337.1 -1	7.8 +3.5	100.2 -0.2	close		+
Radian 2218 NEO SUBWOOFER	28.9 -1.1	0.219 +0.03	333 -5.1	6.3 +2	98.9 -1.5	close		+
RCF L 18P751	30 =	0.238 +0.05	400 +61.9	5 +0.7	100.3 -0.1	usable		+
B&C 18 PZB 46 vp	28.8 -1.2	0.227 +0.04	346.4 +8.3	8.1 +3.8	99 -1.4	usable		+
AE Speakers TD18H+	29 -1	0.221 +0.03	390 +51.9	7 +2.7	99.7 -0.7	usable		+

Compare the closest 3 against the 2243H →

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.