Eminence SIGMA PRO 18

18" · 8 Ω · 650 W · 98.1 dB · datasheet ↗

Thiele-Small parameters

Nominal size	18"
Impedance	8 Ω
Fs	28 Hz
Qts	0.29
Qes	0.3
Qms	8.28
Vas	441.2 L
Sd	1140.1 cm²
Xmax	6.1 mm
Re	6.29 Ω
Bl	22.2 T·m
Mms	133.4 g
Pe	650 W
Sensitivity	98.1 dB

Alignment hint

EBP	93 · flexible
Sealed Vb (Qtc ≈ 0.71)	≈ 89.2 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 SIGMA PRO-18A	28 =	0.29 =	441.2 =	6.1 =	99 +0.9	close		+
Faital PRO 18FH500	28 =	0.29 =	456.7 +15.5	9.45 +3.35	98 -0.1	close	4 Ω vs 8 Ω: amp load changes	+
Faital PRO 18FH510	30 +2	0.29 =	411.9 -29.3	9.25 +3.15	98 -0.1	close		+
B&C 18 PS 46	28 =	0.316 +0.03	386 -55.2	6 -0.1	97.9 -0.2	close	Xmax 6 mm < 6.1 mm: lower excursion-limited SPL	+
Electro-Voice EVX-180A	29 +1	0.27 -0.02	416 -25.2	6.4 +0.3	99.5 +1.4	close		+
Electro-Voice EVX-180B	29 +1	0.27 -0.02	416 -25.2	6.4 +0.3	99.5 +1.4	close		+
18 Sound 18LW800	29 +1	0.272 -0.02	448 +6.8	8 +1.9	99.8 +1.7	close	500 W vs 650 W: lower power handling	+
Dayton Audio PA460-8 18	26.2 -1.8	0.269 -0.02	473.5 +32.3	6 -0.1	98.6 +0.5	close	500 W vs 650 W: lower power handling · Xmax 6 mm < 6.1 mm: lower excursion-limited SPL	+
Dayton Audio PA460-8 18 PRO WOOFER	26.2 -1.8	0.269 -0.02	473.5 +32.3	6 -0.1	98.6 +0.5	close	500 W vs 650 W: lower power handling · Xmax 6 mm < 6.1 mm: lower excursion-limited SPL	+
Celestion FTR18-4080F	28 =	0.265 -0.02	383.3 -57.9	6 -0.1	98.6 +0.5	close	Xmax 6 mm < 6.1 mm: lower excursion-limited SPL	+

Compare the closest 3 against the SIGMA PRO 18 →

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.