TC Sounds LMS-ULTRA 5400
Thiele-Small parameters
| Nominal size | 18" |
|---|---|
| Impedance | 4 Ω |
| Fs | 20.5 Hz |
| Qts | 0.325 |
| Qes | 0.34 |
| Qms | 7.6 |
| Vas | 240.7 L |
| Sd | 1194.6 cm² |
| Xmax | 16 mm |
| Re | 3.78 Ω |
| Bl | 26.8 T·m |
| Mms | 500.9 g |
| Pe | 2000 W |
| Sensitivity | 93.1 dB |
Alignment hint
| EBP | 60 · 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
| Driver | Fs (Hz) | Qts | Vas (L) | Xmax (mm) | Sens (dB) | Fit | Notes | Compare |
|---|---|---|---|---|---|---|---|---|
| Dayton Audio RSS460HO-4 v2015 | 18.8 -1.7 | 0.322 = | 272 +31.3 | 11.9 -4.1 | 93.1 = | close | 900 W vs 2000 W: lower power handling · Xmax 11.9 mm < 16 mm: lower excursion-limited SPL | + |
| FI Audio HT-3 | 21.3 +0.8 | 0.423 +0.1 | 235.9 -4.8 | 17 +1 | 92.9 -0.2 | close | + | |
| Dayton Audio SS18-22 | 21 +0.5 | 0.374 +0.05 | 224 -16.7 | 12.8 -3.2 | 90.6 -2.5 | usable | 8 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-4 | 19.6 -0.9 | 0.387 +0.06 | 298 +57.3 | 12.8 -3.2 | 92.9 -0.2 | usable | 900 W vs 2000 W: lower power handling · Xmax 12.8 mm < 16 mm: lower excursion-limited SPL | + |
| BMS 18N860 | 24 +3.5 | 0.372 +0.05 | 304 +63.3 | 15 -1 | 93.7 +0.6 | usable | 8 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 18N862 | 25.1 +4.6 | 0.34 +0.02 | 312 +71.3 | 19 +3 | 95 +1.9 | usable | 8 Ω vs 4 Ω: amp load changes · 1500 W vs 2000 W: lower power handling | + |
| Stereo Integrity HST-18 MKII | 15.6 -4.9 | 0.327 = | 307 +66.3 | 19 +3 | 90.4 -2.7 | usable | + | |
| Volt RV4564 | 26 +5.5 | 0.313 -0.01 | 238 -2.7 | 9.6 -6.4 | 94.3 +1.2 | usable | 8 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 18N850vv2 | 29.8 +9.3 | 0.33 +0.01 | 243 +2.3 | 12 -4 | 95 +1.9 | usable | 8 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 SAF184.03 | 30 +9.5 | 0.32 -0.01 | 260 +19.3 | 13 -3 | 94.9 +1.8 | usable | 8 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.