B&C 18 RXB
Thiele-Small parameters
| Nominal size | 18" |
|---|---|
| Impedance | 8 Ω |
| Fs | 33 Hz |
| Qts | 0.282 |
| Qes | 0.29 |
| Qms | 10.5 |
| Vas | 370 L |
| Sd | 1134 cm² |
| Xmax | 10 mm |
| Re | 5.4 Ω |
| Bl | 20.9 T·m |
| Mms | 113.3 g |
| Pe | 1000 W |
| Sensitivity | 100.3 dB |
Alignment hint
| EBP | 114 · ported |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 70 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 |
|---|---|---|---|---|---|---|---|---|
| 18 Sound 18ND9300 | 30 -3 | 0.28 = | 322 -48 | 9.5 -0.5 | 98.8 -1.5 | close | Xmax 9.5 mm < 10 mm: lower excursion-limited SPL | + |
| JBL 2258H | 31 -2 | 0.265 -0.02 | 407 +37 | 8 -2 | 100.2 -0.1 | close | Xmax 8 mm < 10 mm: lower excursion-limited SPL | + |
| Faital PRO 18FH510 | 30 -3 | 0.29 +0.01 | 411.9 +41.9 | 9.25 -0.75 | 98 -2.3 | close | 600 W vs 1000 W: lower power handling · Xmax 9.25 mm < 10 mm: lower excursion-limited SPL | + |
| RCF L 18P400 | 29 -4 | 0.279 = | 340 -30 | 8.8 -1.2 | 98.5 -1.8 | close | Xmax 8.8 mm < 10 mm: lower excursion-limited SPL | + |
| Faital PRO 18FH510 | 30 -3 | 0.26 -0.02 | 391.4 +21.4 | 9.45 -0.55 | 98 -2.3 | close | 4 Ω vs 8 Ω: amp load changes · 600 W vs 1000 W: lower power handling · Xmax 9.45 mm < 10 mm: lower excursion-limited SPL | + |
| Beyma 18P80/ND | 30 -3 | 0.283 = | 411 +41 | 7.5 -2.5 | 99.8 -0.5 | close | Xmax 7.5 mm < 10 mm: lower excursion-limited SPL | + |
| RCF LF 18G400 | 28 -5 | 0.273 -0.01 | 360 -10 | 9 -1 | 98.3 -2 | close | Xmax 9 mm < 10 mm: lower excursion-limited SPL | + |
| RCF LF 18X400 v2 | 28 -5 | 0.278 = | 340 -30 | 9 -1 | 98 -2.3 | usable | Xmax 9 mm < 10 mm: lower excursion-limited SPL | + |
| Peavey LO MAX 18 v2011 | 33.5 +0.5 | 0.321 +0.04 | 294.4 -75.6 | 10.2 +0.2 | 98.9 -1.4 | usable | + | |
| Eminence KAPPA PRO 18 LF-8 | 32 -1 | 0.329 +0.05 | 391 +21 | 8 -2 | 99.5 -0.8 | usable | Xmax 8 mm < 10 mm: lower excursion-limited SPL | + |
Compare the closest 3 against the 18 RXB →
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.