RCF CX15N251
Thiele-Small parameters
| Nominal size | 15" |
|---|---|
| Impedance | 8 Ω |
| Fs | 55 Hz |
| Qts | 0.354 |
| Qes | 0.37 |
| Qms | 8 |
| Vas | 136 L |
| Sd | 860 cm² |
| Xmax | 4.1 mm |
| Re | 5.2 Ω |
| Bl | 17.6 T·m |
| Mms | 63.8 g |
| Pe | 300 W |
| Sensitivity | 101.7 dB |
Alignment hint
| EBP | 149 · ported |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 45.5 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 |
|---|---|---|---|---|---|---|---|---|
| Oberton 15XL400 | 48.78 -6.22 | 0.337 -0.02 | 140 +4 | 5.25 +1.15 | 102 +0.3 | close | + | |
| JBL 2035H | 48 -7 | 0.336 -0.02 | 140.5 +4.5 | 4.9 +0.8 | 101.5 -0.2 | close | 4 Ω vs 8 Ω: amp load changes | + |
| Focal 15PR75-250 | 50.8 -4.2 | 0.369 +0.02 | 128.8 -7.2 | 4 -0.1 | 99.7 -2 | close | Xmax 4 mm < 4.1 mm: lower excursion-limited SPL | + |
| Oberton 15LX400 | 48.8 -6.2 | 0.337 -0.02 | 140 +4 | 5.2 +1.1 | 100.2 -1.5 | close | + | |
| Focal 15PR75-275 | 52.2 -2.8 | 0.32 -0.03 | 127.9 -8.1 | 3.8 -0.3 | 100.6 -1.1 | close | Xmax 3.8 mm < 4.1 mm: lower excursion-limited SPL | + |
| Electro-Voice DL15X | 47.3 -7.7 | 0.337 -0.02 | 136 = | 4.1 = | 99.1 -2.6 | close | + | |
| RCF MB 15N301 | 48 -7 | 0.36 +0.01 | 134 -2 | 5.6 +1.5 | 99.2 -2.5 | close | + | |
| P.Audio C15-600EL | 44.9 -10.1 | 0.352 = | 137.4 +1.4 | 5 +0.9 | 99 -2.7 | close | + | |
| RCF L 15/864K | 50 -5 | 0.329 -0.02 | 170 +34 | 4 -0.1 | 101.8 +0.1 | close | Xmax 4 mm < 4.1 mm: lower excursion-limited SPL | + |
| Peavey 1505-8 KA DT BW | 50.8 -4.2 | 0.35 = | 143.5 +7.5 | 9 +4.9 | 98.9 -2.8 | close | + |
Compare the closest 3 against the CX15N251 →
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.