RCF LF18G401
Thiele-Small parameters
| Nominal size | 18" |
|---|---|
| Impedance | 8 Ω |
| Fs | 33 Hz |
| Qts | 0.29 |
| Qes | 0.3 |
| Qms | 7.6 |
| Vas | 268 L |
| Sd | 1200 cm² |
| Xmax | 9 mm |
| Re | 4.8 Ω |
| Bl | 24.6 T·m |
| Mms | 182 g |
| Pe | 900 W |
| Sensitivity | 98 dB |
Alignment hint
| EBP | 110 · ported |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 54.2 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 |
|---|---|---|---|---|---|---|---|---|
| RCF LF18G908 | 33 = | 0.29 = | 268 = | 9 = | 98 = | close | + | |
| RCF LF 18G401 | 33 = | 0.289 = | 268 = | 8.2 -0.8 | 99.3 +1.3 | close | Xmax 8.2 mm < 9 mm: lower excursion-limited SPL | + |
| B&C 18 TBX 46 | 31 -2 | 0.277 -0.01 | 270 +2 | 9 = | 98.2 +0.2 | close | + | |
| 18 Sound 18NLW9400 | 33 = | 0.26 -0.03 | 268 = | 9.5 +0.5 | 98 = | close | + | |
| 18 Sound 18LW1251 | 35 +2 | 0.27 -0.02 | 268 = | 9 = | 98 = | close | + | |
| 18 Sound 18LW1400 | 31 -2 | 0.29 = | 297 +29 | 9 = | 98 = | close | + | |
| Faital PRO 18FX600 | 32 -1 | 0.3 +0.01 | 257.3 -10.7 | 11.25 +2.25 | 99 +1 | close | 700 W vs 900 W: lower power handling | + |
| B&C 18 PZB 100 (prodance) | 33.7 +0.7 | 0.289 = | 263 -5 | 7.6 -1.4 | 99 +1 | close | 700 W vs 900 W: lower power handling · Xmax 7.6 mm < 9 mm: lower excursion-limited SPL | + |
| PHL Audio 7090 v2012 | 34 +1 | 0.297 +0.01 | 260 -8 | 7.9 -1.1 | 98.6 +0.6 | close | Xmax 7.9 mm < 9 mm: lower excursion-limited SPL | + |
| RCF LF18N401 | 32 -1 | 0.26 -0.03 | 257 -11 | 9 = | 98 = | close | + |
Compare the closest 3 against the LF18G401 →
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 (1)
- HSR CHSR146subscoop