Celestion FTR18-4080HD
Thiele-Small parameters
| Nominal size | 18" |
|---|---|
| Impedance | 8 Ω |
| Fs | 26 Hz |
| Qts | 0.272 |
| Qes | 0.29 |
| Qms | 4.33 |
| Vas | 395.6 L |
| Sd | 1130 cm² |
| Xmax | 8 mm |
| Re | 5.39 Ω |
| Bl | 22.7 T·m |
| Mms | 169.6 g |
| Pe | 1000 W |
| Sensitivity | 97.5 dB |
Alignment hint
| EBP | 90 · flexible |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 68.7 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 |
|---|---|---|---|---|---|---|---|---|
| RCF LF18G400 | 28 +2 | 0.27 = | 360 -35.6 | 9 +1 | 97.5 = | close | + | |
| Celestion FTR18-4080FD | 26 = | 0.27 = | 395.56 -0.04 | 6 -2 | 97 -0.5 | close | Xmax 6 mm < 8 mm: lower excursion-limited SPL | + |
| RCF LF 18G400 | 28 +2 | 0.273 = | 360 -35.6 | 9 +1 | 98.3 +0.8 | close | + | |
| RCF LF18X400 | 28 +2 | 0.27 = | 340 -55.6 | 9 +1 | 97.5 = | close | + | |
| Faital PRO 18FH510 | 30 +4 | 0.26 -0.01 | 391.4 -4.2 | 9.45 +1.45 | 98 +0.5 | close | 4 Ω vs 8 Ω: amp load changes · 600 W vs 1000 W: lower power handling | + |
| RCF LF 18X400 v2 | 28 +2 | 0.278 +0.01 | 340 -55.6 | 9 +1 | 98 +0.5 | close | + | |
| DAS Audio S1846 vp2 | 29.6 +3.6 | 0.298 +0.03 | 384 -11.6 | 8 = | 97.7 +0.2 | close | 550 W vs 1000 W: lower power handling | + |
| RCF L 18P200N vp tlhp | 28 +2 | 0.306 +0.03 | 380 -15.6 | 9.8 +1.8 | 97.2 -0.3 | close | + | |
| RCF LF 18X400 | 28 +2 | 0.255 -0.02 | 360 -35.6 | 9 +1 | 98.6 +1.1 | close | + | |
| Faital PRO 18FH510 | 30 +4 | 0.29 +0.02 | 411.9 +16.3 | 9.25 +1.25 | 98 +0.5 | close | 600 W vs 1000 W: lower power handling | + |
Compare the closest 3 against the FTR18-4080HD →
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.