RCF L 18P751
Thiele-Small parameters
| Nominal size | 18" |
|---|---|
| Impedance | 8 Ω |
| Fs | 30 Hz |
| Qts | 0.238 |
| Qes | 0.25 |
| Qms | 5 |
| Vas | 400 L |
| Sd | 1041 cm² |
| Xmax | 5 mm |
| Re | 5.1 Ω |
| Bl | 20.3 T·m |
| Mms | 106.9 g |
| Pe | 450 W |
| Sensitivity | 100.3 dB |
Alignment hint
| EBP | 120 · ported |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 51.1 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 |
|---|---|---|---|---|---|---|---|---|
| McCauley B1840 | 28 -2 | 0.231 -0.01 | 405 +5 | 4.8 -0.2 | 99.1 -1.2 | close | Xmax 4.8 mm < 5 mm: lower excursion-limited SPL | + |
| AE Speakers TD18H+ | 29 -1 | 0.221 -0.02 | 390 -10 | 7 +2 | 99.7 -0.6 | close | + | |
| JBL 2240H | 30 = | 0.224 -0.01 | 481.4 +81.4 | 5.1 +0.1 | 100.4 +0.1 | close | 300 W vs 450 W: lower power handling | + |
| PD PD 182 | 28 -2 | 0.238 = | 391 -9 | 8.2 +3.2 | 98.7 -1.6 | close | + | |
| Precision Devices PD 182 | 28 -2 | 0.238 = | 391 -9 | 8.2 +3.2 | 98.7 -1.6 | close | + | |
| Eminence PS18-6008 vp | 28.1 -1.9 | 0.239 = | 354.1 -45.9 | 5.5 +0.5 | 98.9 -1.4 | close | 300 W vs 450 W: lower power handling | + |
| JBL 2258H | 31 +1 | 0.265 +0.03 | 407 +7 | 8 +3 | 100.2 -0.1 | close | + | |
| AE Speakers TD18H+ 8 Ohms | 29 -1 | 0.221 -0.02 | 390 -10 | 7 +2 | 99 -1.3 | close | + | |
| Eminence OMEGA PRO 18 | 28 -2 | 0.239 = | 354 -46 | 4.8 -0.2 | 98.9 -1.4 | close | Xmax 4.8 mm < 5 mm: lower excursion-limited SPL | + |
| JBL 2240H/G | 30 = | 0.23 -0.01 | 480 +80 | 5.5 +0.5 | 99 -1.3 | close | 300 W vs 450 W: lower power handling | + |
Compare the closest 3 against the L 18P751 →
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.