JB Systems 153431 SW 15 250
Thiele-Small parameters
| Nominal size | 15" |
|---|---|
| Impedance | 8 Ω |
| Fs | 49 Hz |
| Qts | 0.309 |
| Qes | 0.334 |
| Qms | 4.218 |
| Vas | 115.3 L |
| Sd | 706 cm² |
| Xmax | 4.1 mm |
| Re | 6.47 Ω |
| Bl | 19.5 T·m |
| Mms | 63.9 g |
| Pe | 250 W |
| Sensitivity | 99 dB |
Alignment hint
| EBP | 147 · ported |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 27.2 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 |
|---|---|---|---|---|---|---|---|---|
| RCF L 15S800 | 48 -1 | 0.32 +0.01 | 113 -2.3 | 5.5 +1.4 | 98.9 -0.1 | close | + | |
| Ciare NDH 15-3 | 49.8 +0.8 | 0.296 -0.01 | 110.9 -4.4 | 4.3 +0.2 | 99.7 +0.7 | close | + | |
| RCF L 15S801 | 48 -1 | 0.32 +0.01 | 113 -2.3 | 6 +1.9 | 98.9 -0.1 | close | + | |
| RCF L 15S801-8 | 48 -1 | 0.32 +0.01 | 113 -2.3 | 6 +1.9 | 98.9 -0.1 | close | + | |
| RCF MB 15N351 v2012 | 46 -3 | 0.315 +0.01 | 114 -1.3 | 5.7 +1.6 | 99 = | close | + | |
| Audax PR380T10 | 49 = | 0.314 +0.01 | 107 -8.3 | 3.7 -0.4 | 99.2 +0.2 | close | Xmax 3.7 mm < 4.1 mm: lower excursion-limited SPL | + |
| RCF MB 15X351 | 46 -3 | 0.315 +0.01 | 114 -1.3 | 5.9 +1.8 | 99 = | close | + | |
| Audax PR380T4 | 49 = | 0.322 +0.01 | 107 -8.3 | 3.8 -0.3 | 99.1 +0.1 | close | Xmax 3.8 mm < 4.1 mm: lower excursion-limited SPL | + |
| RCF L15S830 | 52 +3 | 0.28 -0.03 | 115 -0.3 | 4 -0.1 | 99.2 +0.2 | close | Xmax 4 mm < 4.1 mm: lower excursion-limited SPL | + |
| Beyma 15MC700Nd | 49 = | 0.31 = | 105 -10.3 | 7 +2.9 | 100 +1 | close | + |
Compare the closest 3 against the 153431 SW 15 250 →
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.