Focal 15PR75-250
Thiele-Small parameters
| Nominal size | 15" |
|---|---|
| Impedance | 8 Ω |
| Fs | 50.8 Hz |
| Qts | 0.369 |
| Qes | 0.383 |
| Qms | 10.205 |
| Vas | 128.8 L |
| Sd | 855 cm² |
| Xmax | 4 mm |
| Re | 6 Ω |
| Bl | 19.8 T·m |
| Mms | 78.2 g |
| Pe | 250 W |
| Sensitivity | 99.7 dB |
Alignment hint
| EBP | 133 · ported |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 48.2 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 |
|---|---|---|---|---|---|---|---|---|
| LaVoce WXF15.350-8 | 50 -0.8 | 0.38 +0.01 | 118 -10.8 | 4.6 +0.6 | 99.3 -0.4 | close | + | |
| LaVoce WXF15.400 | 50 -0.8 | 0.38 +0.01 | 118 -10.8 | 4.9 +0.9 | 99.3 -0.4 | close | + | |
| RCF MB 15N301 | 48 -2.8 | 0.36 -0.01 | 134 +5.2 | 5.6 +1.6 | 99.2 -0.5 | close | + | |
| PD PD 156 | 50.2 -0.6 | 0.378 +0.01 | 120.2 -8.6 | 6.6 +2.6 | 99.2 -0.5 | close | + | |
| Precision Devices PD 156 | 50.2 -0.6 | 0.378 +0.01 | 120.2 -8.6 | 6.6 +2.6 | 99.2 -0.5 | close | + | |
| Audax PR38EX100VST | 47.7 -3.1 | 0.372 = | 117.9 -10.9 | 3.9 -0.1 | 98.6 -1.1 | close | Xmax 3.9 mm < 4 mm: lower excursion-limited SPL | + |
| 18 Sound 15W1301 | 48 -2.8 | 0.355 -0.01 | 123 -5.8 | 6 +2 | 99.3 -0.4 | close | + | |
| JB Systems WHAREFEDALE B-15-250 | 49.1 -1.7 | 0.409 +0.04 | 125 -3.8 | 4 = | 98.7 -1 | close | + | |
| Eighteen Sound 15NCX750 | 49 -1.8 | 0.37 = | 141 +12.2 | 5.5 +1.5 | 98 -1.7 | close | + | |
| Eminence KAPPA PRO 15 LF v1 | 46 -4.8 | 0.372 = | 127.5 -1.3 | 6.4 +2.4 | 98.6 -1.1 | close | + |
Compare the closest 3 against the 15PR75-250 →
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.