JBL 2258H

18" · 8 Ω · 800 W · 100.2 dB

Thiele-Small parameters

Nominal size	18"
Impedance	8 Ω
Fs	31 Hz
Qts	0.265
Qes	0.28
Qms	4.82
Vas	407 L
Sd	1240 cm²
Xmax	8 mm
Re	5.2 Ω
Bl	22.5 T·m
Mms	139.6 g
Pe	800 W
Sensitivity	100.2 dB

Alignment hint

EBP	111 · ported
Sealed Vb (Qtc ≈ 0.71)	≈ 66.5 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
Beyma 18P80/ND	30 -1	0.283 +0.02	411 +4	7.5 -0.5	99.8 -0.4	close	Xmax 7.5 mm < 8 mm: lower excursion-limited SPL	+
18 Sound 18LW800	29 -2	0.272 +0.01	448 +41	8 =	99.8 -0.4	close	500 W vs 800 W: lower power handling	+
Faital PRO 18FH510	30 -1	0.26 -0.01	391.4 -15.6	9.45 +1.45	98 -2.2	close	4 Ω vs 8 Ω: amp load changes · 600 W vs 800 W: lower power handling	+
B&C 18 RXB	33 +2	0.282 +0.02	370 -37	10 +2	100.3 +0.1	close		+
Electro-Voice EVX-180A	29 -2	0.27 +0.01	416 +9	6.4 -1.6	99.5 -0.7	close	600 W vs 800 W: lower power handling · Xmax 6.4 mm < 8 mm: lower excursion-limited SPL	+
Electro-Voice EVX-180B	29 -2	0.27 +0.01	416 +9	6.4 -1.6	99.5 -0.7	close	600 W vs 800 W: lower power handling · Xmax 6.4 mm < 8 mm: lower excursion-limited SPL	+
Faital PRO 18FH510	30 -1	0.29 +0.02	411.9 +4.9	9.25 +1.25	98 -2.2	close	600 W vs 800 W: lower power handling	+
PD PD 182	28 -3	0.238 -0.03	391 -16	8.2 +0.2	98.7 -1.5	close	600 W vs 800 W: lower power handling	+
Precision Devices PD 182	28 -3	0.238 -0.03	391 -16	8.2 +0.2	98.7 -1.5	close	600 W vs 800 W: lower power handling	+
RCF LF 18X400	28 -3	0.255 -0.01	360 -47	9 +1	98.6 -1.6	close		+

Compare the closest 3 against the 2258H →

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.