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Selenium TORNADO 18SW3A

18" · 4 Ω · 1100 W · 93.7 dB

Thiele-Small parameters

Nominal size18"
Impedance4 Ω
Fs41 Hz
Qts0.55
Qes0.57
Qms17.8
Vas126.3 L
Sd1189 cm²
Xmax7.8 mm
Re3.2 Ω
Bl18.7 T·m
Mms239.4 g
Pe1100 W
Sensitivity93.7 dB

Alignment hint

EBP72 · flexible
Sealed Vb (Qtc ≈ 0.71)≈ 193.4 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

DriverFs (Hz)QtsVas (L)Xmax (mm)Sens (dB)FitNotesCompare
JBL 18SWT3000(TORNADO)41 =0.55 =126 -0.310.6 +2.893.7 =close+
LaVoce SAF184.0437 -40.474 -0.08143 +16.79.3 +1.595.2 +1.5usable8 Ω vs 4 Ω: amp load changes+
Faital PRO 18HP1030-8 vp non rod&eacute;46.3 +5.30.587 +0.04101 -25.37.3 -0.596.1 +2.4usable8 Ω vs 4 Ω: amp load changes · Xmax 7.3 mm < 7.8 mm: lower excursion-limited SPL+
Selenium VULCANO 3.8 18SWV3.847.4 +6.40.5 -0.05100.1 -26.211 +3.294.8 +1.1usable+
Celestion CF1840JD44.2 +3.20.444 -0.11113.9 -12.48.5 +0.796.8 +3.1usable8 Ω vs 4 Ω: amp load changes+
P.Audio R18/100B50.7 +9.70.546 =118.1 -8.25.9 -1.997.1 +3.4usable8 Ω vs 4 Ω: amp load changes · 800 W vs 1100 W: lower power handling · Xmax 5.9 mm < 7.8 mm: lower excursion-limited SPL+
Sica 18 PF 438 -30.43 -0.12147.3 +218 +0.296.3 +2.6usable8 Ω vs 4 Ω: amp load changes+
PD PD 186/234.2 -6.80.523 -0.03192.2 +65.98.7 +0.994.5 +0.8usable8 Ω vs 4 Ω: amp load changes · 700 W vs 1100 W: lower power handling+
Precision Devices PD 186/234.2 -6.80.523 -0.03192.2 +65.98.7 +0.994.5 +0.8usable8 Ω vs 4 Ω: amp load changes · 700 W vs 1100 W: lower power handling+
P.Audio SD18-1700EL42 +10.59 +0.0499.72 -26.584.8 -392.6 -1.1usable8 Ω vs 4 Ω: amp load changes · Xmax 4.8 mm < 7.8 mm: lower excursion-limited SPL+

Compare the closest 3 against the TORNADO 18SW3A →

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 (5)