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FI Audio HT-3

18" · 4 Ω · 2000 W · 92.9 dB · datasheet ↗

Thiele-Small parameters

Nominal size18"
Impedance4 Ω
Fs21.3 Hz
Qts0.423
Qes0.45
Qms6.94
Vas235.9 L
Sd1210 cm²
Xmax17 mm
Re3.3 Ω
Bl21.8 T·m
Mms485.8 g
Pe2000 W
Sensitivity92.9 dB

Alignment hint

EBP47 · sealed
Sealed Vb (Qtc ≈ 0.71)≈ 131.5 L

EBP < 50: favours a sealed (closed) 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
TC Sounds LMS-ULTRA 540020.5 -0.80.325 -0.1240.7 +4.816 -193.1 +0.2usableXmax 16 mm < 17 mm: lower excursion-limited SPL+
Dayton Audio SS18-2221 -0.30.374 -0.05224 -11.912.8 -4.290.6 -2.3usable8 Ω vs 4 Ω: amp load changes · 1300 W vs 2000 W: lower power handling · Xmax 12.8 mm < 17 mm: lower excursion-limited SPL+
Dayton Audio RSS460HO-419.6 -1.70.387 -0.04298 +62.112.8 -4.292.9 =usable900 W vs 2000 W: lower power handling · Xmax 12.8 mm < 17 mm: lower excursion-limited SPL+
Aura Sound NS18-992-4A20 -1.30.47 +0.05322 +86.114.5 -2.593.2 +0.3usable800 W vs 2000 W: lower power handling · Xmax 14.5 mm < 17 mm: lower excursion-limited SPL+
Dayton Audio UMII18-22 ULTIMAX II DVC22 +0.70.53 +0.11248.2 +12.313.8 -3.290.7 -2.2usable8 Ω vs 4 Ω: amp load changes · 1200 W vs 2000 W: lower power handling · Xmax 13.8 mm < 17 mm: lower excursion-limited SPL+
Faital PRO 18XL180029 +7.70.4 -0.02215.5 -20.420.17 +3.1795 +2.1usable8 Ω vs 4 Ω: amp load changes+
BMS 18N86024 +2.70.372 -0.05304 +68.115 -293.7 +0.8usable8 Ω vs 4 Ω: amp load changes · 1500 W vs 2000 W: lower power handling · Xmax 15 mm < 17 mm: lower excursion-limited SPL+
Stereo Integrity HST-18 Dual 2 Ohms16.4 -4.90.388 -0.03267 +31.119 +289.7 -3.2usable+
BMS 18N862 vp24.8 +3.50.383 -0.04345.6 +109.716.2 -0.894.8 +1.9usable8 Ω vs 4 Ω: amp load changes · 1500 W vs 2000 W: lower power handling · Xmax 16.2 mm < 17 mm: lower excursion-limited SPL+
Dayton Audio UM18-22 1819.5 -1.80.487 +0.06216.8 -19.112.2 -4.889 -3.9usable8 Ω vs 4 Ω: amp load changes · 1000 W vs 2000 W: lower power handling · Xmax 12.2 mm < 17 mm: lower excursion-limited SPL+

Compare the closest 3 against the HT-3 →

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.