RCF LF18N401
Thiele-Small parameters
| Nominal size | 18" |
|---|---|
| Impedance | 8 Ω |
| Fs | 32 Hz |
| Qts | 0.26 |
| Qes | 0.27 |
| Qms | 6.5 |
| Vas | 257 L |
| Sd | 1200 cm² |
| Xmax | 9 mm |
| Re | 5.1 Ω |
| Bl | 27.8 T·m |
| Mms | 201 g |
| Pe | 1200 W |
| Sensitivity | 98 dB |
Alignment hint
| EBP | 119 · ported |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 40.2 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 |
|---|---|---|---|---|---|---|---|---|
| B&C 18NW100 | 31 -1 | 0.26 = | 252 -5 | 9 = | 98 = | close | + | |
| RCF LF 18N401 | 32 = | 0.259 = | 257 = | 8.8 -0.2 | 98.9 +0.9 | close | Xmax 8.8 mm < 9 mm: lower excursion-limited SPL | + |
| 18 Sound 18NLW9400 | 33 +1 | 0.26 = | 268 +11 | 9.5 +0.5 | 98 = | close | + | |
| B&C 18 NW 100 | 31 -1 | 0.254 -0.01 | 252 -5 | 8.7 -0.3 | 98.4 +0.4 | close | Xmax 8.7 mm < 9 mm: lower excursion-limited SPL | + |
| Beyma 18PW1400FE /S | 32 = | 0.27 +0.01 | 228.9 -28.1 | 10 +1 | 98 = | close | + | |
| B&C 18 TBX 46 | 31 -1 | 0.277 +0.02 | 270 +13 | 9 = | 98.2 +0.2 | close | + | |
| Beyma 18PW1400/FE | 32 = | 0.273 +0.01 | 228.9 -28.1 | 9.1 +0.1 | 98.3 +0.3 | close | + | |
| 18 Sound 18LW1251 | 35 +3 | 0.27 +0.01 | 268 +11 | 9 = | 98 = | close | + | |
| RCF LF18N451 | 31 -1 | 0.24 -0.02 | 245 -12 | 9 = | 97.5 -0.5 | close | + | |
| RCF LF18G401 | 33 +1 | 0.29 +0.03 | 268 +11 | 9 = | 98 = | close | 900 W vs 1200 W: lower power handling | + |
Compare the closest 3 against the LF18N401 →
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)
- MHB-46subfolded horn