FI Audio BTLN2
Thiele-Small parameters
| Nominal size | 18" |
|---|---|
| Impedance | 2 Ω |
| Fs | 33.6 Hz |
| Qts | 0.308 |
| Qes | 0.32 |
| Qms | 8.28 |
| Vas | 133.8 L |
| Sd | 1210 cm² |
| Xmax | 10 mm |
| Re | 1.4 Ω |
| Bl | 17.8 T·m |
| Mms | 344.2 g |
| Pe | 2500 W |
| Sensitivity | 101.6 dB |
Alignment hint
| EBP | 105 · ported |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 31.3 L |
EBP > 100: favours a ported (bass-reflex) 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 |
|---|---|---|---|---|---|---|---|---|
| Ascendant Audio 18 DUAL 1 Ohms | 29.7 -3.9 | 0.302 -0.01 | 114.3 -19.5 | 12.2 +2.2 | 102.3 +0.7 | close | 1 Ω vs 2 Ω: amp load changes | + |
| Ascendant Audio 18 DUAL 2 Ohms | 29.7 -3.9 | 0.302 -0.01 | 114.3 -19.5 | 12.1 +2.1 | 99.4 -2.2 | close | + | |
| 18 Sound 18LW2500 | 34 +0.4 | 0.335 +0.03 | 135 +1.2 | 9.1 -0.9 | 96 -5.6 | usable | 8 Ω vs 2 Ω: amp load changes · 1600 W vs 2500 W: lower power handling · Xmax 9.1 mm < 10 mm: lower excursion-limited SPL | + |
| B&C 18SW115 | 34 +0.4 | 0.3 -0.01 | 149.1 +15.3 | 14 +4 | 96 -5.6 | usable | 4 Ω vs 2 Ω: amp load changes · 1700 W vs 2500 W: lower power handling | + |
| 18 Sound 18NLW4500 | 37 +3.4 | 0.31 = | 127 -6.8 | 14.75 +4.75 | 96.5 -5.1 | usable | 4 Ω vs 2 Ω: amp load changes · 1800 W vs 2500 W: lower power handling | + |
| Oberton 18NXB700 | 36.24 +2.64 | 0.312 = | 155.46 +21.66 | 9 -1 | 98 -3.6 | usable | 8 Ω vs 2 Ω: amp load changes · 1000 W vs 2500 W: lower power handling · Xmax 9 mm < 10 mm: lower excursion-limited SPL | + |
| B&C 18DS100 | 34 +0.4 | 0.29 -0.02 | 155 +21.2 | 14.5 +4.5 | 97.5 -4.1 | usable | 8 Ω vs 2 Ω: amp load changes · 1500 W vs 2500 W: lower power handling | + |
| Oberton 18XB1201 | 38.05 +4.45 | 0.317 +0.01 | 159.37 +25.57 | 10.5 +0.5 | 98.5 -3.1 | usable | 8 Ω vs 2 Ω: amp load changes · 1200 W vs 2500 W: lower power handling | + |
| 18 Sound 18NLW9600 | 34 +0.4 | 0.281 -0.03 | 149 +15.2 | 9 -1 | 97.3 -4.3 | usable | 8 Ω vs 2 Ω: amp load changes · 1800 W vs 2500 W: lower power handling · Xmax 9 mm < 10 mm: lower excursion-limited SPL | + |
| Faital PRO 18HP1030 | 35 +1.4 | 0.32 +0.01 | 172.2 +38.4 | 12.45 +2.45 | 98 -3.6 | usable | 4 Ω vs 2 Ω: amp load changes · 1200 W vs 2500 W: lower power handling | + |
Compare the closest 3 against the BTLN2 →
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.