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TC Sounds LMS-ULTRA 5400

18" · 4 Ω · 2000 W · 93.1 dB · datasheet ↗

Thiele-Small parameters

Nominal size18"
Impedance4 Ω
Fs20.5 Hz
Qts0.325
Qes0.34
Qms7.6
Vas240.7 L
Sd1194.6 cm²
Xmax16 mm
Re3.78 Ω
Bl26.8 T·m
Mms500.9 g
Pe2000 W
Sensitivity93.1 dB

Alignment hint

EBP60 · flexible
Sealed Vb (Qtc ≈ 0.71)≈ 64.5 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
Dayton Audio RSS460HO-4 v201518.8 -1.70.322 =272 +31.311.9 -4.193.1 =close900 W vs 2000 W: lower power handling · Xmax 11.9 mm < 16 mm: lower excursion-limited SPL+
FI Audio HT-321.3 +0.80.423 +0.1235.9 -4.817 +192.9 -0.2close+
Dayton Audio SS18-2221 +0.50.374 +0.05224 -16.712.8 -3.290.6 -2.5usable8 Ω vs 4 Ω: amp load changes · 1300 W vs 2000 W: lower power handling · Xmax 12.8 mm < 16 mm: lower excursion-limited SPL+
Dayton Audio RSS460HO-419.6 -0.90.387 +0.06298 +57.312.8 -3.292.9 -0.2usable900 W vs 2000 W: lower power handling · Xmax 12.8 mm < 16 mm: lower excursion-limited SPL+
BMS 18N86024 +3.50.372 +0.05304 +63.315 -193.7 +0.6usable8 Ω vs 4 Ω: amp load changes · 1500 W vs 2000 W: lower power handling · Xmax 15 mm < 16 mm: lower excursion-limited SPL+
BMS 18N86225.1 +4.60.34 +0.02312 +71.319 +395 +1.9usable8 Ω vs 4 Ω: amp load changes · 1500 W vs 2000 W: lower power handling+
Stereo Integrity HST-18 MKII15.6 -4.90.327 =307 +66.319 +390.4 -2.7usable+
Volt RV456426 +5.50.313 -0.01238 -2.79.6 -6.494.3 +1.2usable8 Ω vs 4 Ω: amp load changes · 750 W vs 2000 W: lower power handling · Xmax 9.6 mm < 16 mm: lower excursion-limited SPL+
BMS 18N850vv229.8 +9.30.33 +0.01243 +2.312 -495 +1.9usable8 Ω vs 4 Ω: amp load changes · 1200 W vs 2000 W: lower power handling · Xmax 12 mm < 16 mm: lower excursion-limited SPL+
Lavoce SAF184.0330 +9.50.32 -0.01260 +19.313 -394.9 +1.8usable8 Ω vs 4 Ω: amp load changes · 1500 W vs 2000 W: lower power handling · Xmax 13 mm < 16 mm: lower excursion-limited SPL+

Compare the closest 3 against the LMS-ULTRA 5400 →

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.