FI Audio HT-3
Thiele-Small parameters
| Nominal size | 18" |
|---|---|
| Impedance | 4 Ω |
| Fs | 21.3 Hz |
| Qts | 0.423 |
| Qes | 0.45 |
| Qms | 6.94 |
| Vas | 235.9 L |
| Sd | 1210 cm² |
| Xmax | 17 mm |
| Re | 3.3 Ω |
| Bl | 21.8 T·m |
| Mms | 485.8 g |
| Pe | 2000 W |
| Sensitivity | 92.9 dB |
Alignment hint
| EBP | 47 · 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
| Driver | Fs (Hz) | Qts | Vas (L) | Xmax (mm) | Sens (dB) | Fit | Notes | Compare |
|---|---|---|---|---|---|---|---|---|
| TC Sounds LMS-ULTRA 5400 | 20.5 -0.8 | 0.325 -0.1 | 240.7 +4.8 | 16 -1 | 93.1 +0.2 | usable | Xmax 16 mm < 17 mm: lower excursion-limited SPL | + |
| Dayton Audio SS18-22 | 21 -0.3 | 0.374 -0.05 | 224 -11.9 | 12.8 -4.2 | 90.6 -2.3 | usable | 8 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-4 | 19.6 -1.7 | 0.387 -0.04 | 298 +62.1 | 12.8 -4.2 | 92.9 = | usable | 900 W vs 2000 W: lower power handling · Xmax 12.8 mm < 17 mm: lower excursion-limited SPL | + |
| Aura Sound NS18-992-4A | 20 -1.3 | 0.47 +0.05 | 322 +86.1 | 14.5 -2.5 | 93.2 +0.3 | usable | 800 W vs 2000 W: lower power handling · Xmax 14.5 mm < 17 mm: lower excursion-limited SPL | + |
| Dayton Audio UMII18-22 ULTIMAX II DVC | 22 +0.7 | 0.53 +0.11 | 248.2 +12.3 | 13.8 -3.2 | 90.7 -2.2 | usable | 8 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 18XL1800 | 29 +7.7 | 0.4 -0.02 | 215.5 -20.4 | 20.17 +3.17 | 95 +2.1 | usable | 8 Ω vs 4 Ω: amp load changes | + |
| BMS 18N860 | 24 +2.7 | 0.372 -0.05 | 304 +68.1 | 15 -2 | 93.7 +0.8 | usable | 8 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 Ohms | 16.4 -4.9 | 0.388 -0.03 | 267 +31.1 | 19 +2 | 89.7 -3.2 | usable | + | |
| BMS 18N862 vp | 24.8 +3.5 | 0.383 -0.04 | 345.6 +109.7 | 16.2 -0.8 | 94.8 +1.9 | usable | 8 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 18 | 19.5 -1.8 | 0.487 +0.06 | 216.8 -19.1 | 12.2 -4.8 | 89 -3.9 | usable | 8 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.