Eighteen Sound 15NCX750
Thiele-Small parameters
| Nominal size | 15" |
|---|---|
| Impedance | 8 Ω |
| Fs | 49 Hz |
| Qts | 0.37 |
| Qes | 0.39 |
| Qms | 6.32 |
| Vas | 141 L |
| Sd | 881 cm² |
| Xmax | 5.5 mm |
| Re | 5.4 Ω |
| Bl | 18.4 T·m |
| Mms | 81 g |
| Pe | 400 W |
| Sensitivity | 98 dB |
Alignment hint
| EBP | 126 · ported |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 53.2 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 |
|---|---|---|---|---|---|---|---|---|
| JBL 2226HPL vp prodance | 49 = | 0.396 +0.03 | 140.1 -0.9 | 5.8 +0.3 | 99.2 +1.2 | close | + | |
| Eminence KAPPA PRO 15 LF | 46 -3 | 0.373 = | 142.2 +1.2 | 6.7 +1.2 | 98.9 +0.9 | close | + | |
| RCF MB 15N301 | 48 -1 | 0.36 -0.01 | 134 -7 | 5.6 +0.1 | 99.2 +1.2 | close | + | |
| 18 Sound 15W1300 | 46 -3 | 0.361 -0.01 | 138 -3 | 6 +0.5 | 99 +1 | close | + | |
| RCF L 15P542K | 45 -4 | 0.355 -0.02 | 146 +5 | 6.2 +0.7 | 98 = | close | + | |
| Eminence KAPPA PRO 15 LF v1 | 46 -3 | 0.372 = | 127.5 -13.5 | 6.4 +0.9 | 98.6 +0.6 | close | + | |
| Celestion FTR15-3070E | 45.3 -3.7 | 0.4 +0.03 | 143.9 +2.9 | 5.5 = | 98.4 +0.4 | close | + | |
| Oberton 15NCX | 43.7 -5.3 | 0.361 -0.01 | 138.5 -2.5 | 6.1 +0.6 | 98.8 +0.8 | close | + | |
| Eminence 15-3008PS LF | 46.6 -2.4 | 0.396 +0.03 | 130 -11 | 5.5 = | 98.4 +0.4 | close | + | |
| Sica 15 N 3 PL | 46.9 -2.1 | 0.37 = | 140.4 -0.6 | 10 +4.5 | 99.8 +1.8 | close | + |
Compare the closest 3 against the 15NCX750 →
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.