Focal 46 KX 4
Thiele-Small parameters
| Nominal size | 18" |
|---|---|
| Impedance | 8 Ω |
| Fs | 29.4 Hz |
| Qts | 0.345 |
| Qes | 0.37 |
| Qms | 5.05 |
| Vas | 206.3 L |
| Sd | 1320.3 cm² |
| Xmax | 8 mm |
| Re | 4.2 Ω |
| Bl | 27 T·m |
| Mms | 347.1 g |
| Pe | 1000 W |
| Sensitivity | 96.3 dB |
Alignment hint
| EBP | 79 · flexible |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 64.5 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 LF 18N408 | 30 +0.6 | 0.327 -0.02 | 193 -13.3 | 9.8 +1.8 | 96.3 = | close | + | |
| Beyma 18SW1600ND | 32 +2.6 | 0.33 -0.01 | 205.7 -0.6 | 10 +2 | 96.6 +0.3 | close | + | |
| Eminence DEFINIMAX 4018 LF | 32 +2.6 | 0.348 = | 237.9 +31.6 | 8.6 +0.6 | 96.4 +0.1 | close | + | |
| B&C 18TBX100 | 34 +4.6 | 0.35 +0.01 | 212 +5.7 | 9 +1 | 97 +0.7 | close | + | |
| RCF LF 18N405 | 30 +0.6 | 0.324 -0.02 | 227 +20.7 | 10.8 +2.8 | 96.7 +0.4 | close | + | |
| RCF LF18N408 | 30 +0.6 | 0.33 -0.01 | 193 -13.3 | 15 +7 | 97 +0.7 | close | + | |
| B&C 18 TBX 100 | 34 +4.6 | 0.352 +0.01 | 212 +5.7 | 9 +1 | 97.5 +1.2 | close | + | |
| 18 Sound 18LW1400 | 33 +3.6 | 0.32 -0.02 | 210 +3.7 | 9 +1 | 97 +0.7 | close | 4 Ω vs 8 Ω: amp load changes | + |
| BMS 18S430vv2 | 31 +1.6 | 0.34 = | 262 +55.7 | 8 = | 96 -0.3 | close | + | |
| 18 Sound 18NLW4100 | 31 +1.6 | 0.34 = | 180 -26.3 | 15 +7 | 96.5 +0.2 | close | + |
Compare the closest 3 against the 46 KX 4 →
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.