18 Sound 18LW800

18" · 8 Ω · 500 W · 99.8 dB · datasheet ↗

Thiele-Small parameters

Nominal size	18"
Impedance	8 Ω
Fs	29 Hz
Qts	0.272
Qes	0.29
Qms	4.5
Vas	448 L
Sd	1133 cm²
Xmax	8 mm
Re	5 Ω
Bl	19.5 T·m
Mms	121 g
Pe	500 W
Sensitivity	99.8 dB

Alignment hint

EBP	100 · flexible
Sealed Vb (Qtc ≈ 0.71)	≈ 77.8 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
Beyma 18P80/ND	30 +1	0.283 +0.01	411 -37	7.5 -0.5	99.8 =	close	Xmax 7.5 mm < 8 mm: lower excursion-limited SPL	+
JBL 2258H	31 +2	0.265 -0.01	407 -41	8 =	100.2 +0.4	close		+
Electro-Voice EVX-180A	29 =	0.27 =	416 -32	6.4 -1.6	99.5 -0.3	close	Xmax 6.4 mm < 8 mm: lower excursion-limited SPL	+
Electro-Voice EVX-180B	29 =	0.27 =	416 -32	6.4 -1.6	99.5 -0.3	close	Xmax 6.4 mm < 8 mm: lower excursion-limited SPL	+
Faital PRO 18FH500	28 -1	0.29 +0.02	456.7 +8.7	9.45 +1.45	98 -1.8	close	4 Ω vs 8 Ω: amp load changes	+
Faital PRO 18FH510	30 +1	0.29 +0.02	411.9 -36.1	9.25 +1.25	98 -1.8	close		+
RCF LF 18G400	28 -1	0.273 =	360 -88	9 +1	98.3 -1.5	close		+
Faital PRO 18FH510	30 +1	0.26 -0.01	391.4 -56.6	9.45 +1.45	98 -1.8	close	4 Ω vs 8 Ω: amp load changes	+
Celestion FTR18-4080HD	26 -3	0.272 =	395.6 -52.4	8 =	97.5 -2.3	close		+
Eminence SIGMA PRO-18A	28 -1	0.29 +0.02	441.2 -6.8	6.1 -1.9	99 -0.8	close	Xmax 6.1 mm < 8 mm: lower excursion-limited SPL	+

Compare the closest 3 against the 18LW800 →

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.