B&C 15 TBX 40
Thiele-Small parameters
| Nominal size | 15" |
|---|---|
| Impedance | 8 Ω |
| Fs | 38 Hz |
| Qts | 0.277 |
| Qes | 0.29 |
| Qms | 6.3 |
| Vas | 131 L |
| Sd | 855 cm² |
| Xmax | 7.8 mm |
| Re | 5.2 Ω |
| Bl | 24.2 T·m |
| Mms | 137.2 g |
| Pe | 1000 W |
| Sensitivity | 97.8 dB |
Alignment hint
| EBP | 131 · ported |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 23.7 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 |
|---|---|---|---|---|---|---|---|---|
| BMS 15S435 | 38 = | 0.28 = | 129 -2 | 8 +0.2 | 97 -0.8 | close | + | |
| Faital PRO 15FX600 | 38 = | 0.27 -0.01 | 128.3 -2.7 | 11.25 +3.45 | 98 +0.2 | close | 700 W vs 1000 W: lower power handling | + |
| PHL Audio 6030 | 38 = | 0.264 -0.01 | 130 -1 | 7.2 -0.6 | 97.6 -0.2 | close | Xmax 7.2 mm < 7.8 mm: lower excursion-limited SPL | + |
| Faital PRO 15HP1020 | 40 +2 | 0.27 -0.01 | 126.6 -4.4 | 9 +1.2 | 98 +0.2 | close | 700 W vs 1000 W: lower power handling | + |
| BMS 15N840V2-8 | 35.6 -2.4 | 0.268 -0.01 | 130 -1 | 8.7 +0.9 | 97.2 -0.6 | close | + | |
| 18 Sound 15LW1401 | 39 +1 | 0.26 -0.02 | 127 -4 | 9 +1.2 | 98 +0.2 | close | 4 Ω vs 8 Ω: amp load changes | + |
| 18 Sound 15LW1401 | 42 +4 | 0.27 -0.01 | 131 = | 9 +1.2 | 98 +0.2 | close | + | |
| 18 Sound 15NLW9401 | 39 +1 | 0.26 -0.02 | 134 +3 | 10 +2.2 | 97.5 -0.3 | close | + | |
| PHL Audio 6201MNd | 36 -2 | 0.266 -0.01 | 138.4 +7.4 | 7.9 +0.1 | 97.3 -0.5 | close | + | |
| 18 Sound 15LW1410 | 42 +4 | 0.27 -0.01 | 131 = | 8.5 +0.7 | 98.5 +0.7 | close | + |
Compare the closest 3 against the 15 TBX 40 →
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.