JBL K140
Thiele-Small parameters
| Nominal size | 15" |
|---|---|
| Impedance | 8 Ω |
| Fs | 30 Hz |
| Qts | 0.211 |
| Qes | 0.22 |
| Qms | 5 |
| Vas | 297.3 L |
| Sd | 900 cm² |
| Xmax | 4.1 mm |
| Re | 5.5 Ω |
| Bl | 22.5 T·m |
| Mms | 107.5 g |
| Pe | 150 W |
| Sensitivity | 99.2 dB |
Alignment hint
| EBP | 136 · ported |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 29.1 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 |
|---|---|---|---|---|---|---|---|---|
| Beyma 15GT200 v2 | 31 +1 | 0.218 +0.01 | 270 -27.3 | 5.4 +1.3 | 98.8 -0.4 | close | + | |
| Beyma SM115/K vp2 | 29.8 -0.2 | 0.228 +0.02 | 291 -6.3 | 8 +3.9 | 99 -0.2 | close | + | |
| Beyma 15GT200 v1 | 30.4 +0.4 | 0.223 +0.01 | 270 -27.3 | 5.5 +1.4 | 98.4 -0.8 | close | + | |
| RCF L 15/541 | 30.9 +0.9 | 0.236 +0.02 | 300 +2.7 | 5.6 +1.5 | 98.1 -1.1 | close | + | |
| Beyma SM115/K vp1 | 27.6 -2.4 | 0.222 +0.01 | 296.7 -0.6 | 8 +3.9 | 98.3 -0.9 | close | + | |
| JBL 2205A | 30 = | 0.211 = | 297.3 = | 2.5 -1.6 | 99.2 = | close | 100 W vs 150 W: lower power handling · Xmax 2.5 mm < 4.1 mm: lower excursion-limited SPL | + |
| JBL 2205H | 30 = | 0.211 = | 297.3 = | 2.5 -1.6 | 99.2 = | close | Xmax 2.5 mm < 4.1 mm: lower excursion-limited SPL | + |
| Beyma 15BR400 | 30 = | 0.236 +0.02 | 274 -23.3 | 6 +1.9 | 98.3 -0.9 | close | + | |
| Fane SOVEREIGN PRO 15-600N | 33 +3 | 0.222 +0.01 | 310 +12.7 | 6.5 +2.4 | 100.5 +1.3 | close | + | |
| P.Audio BM15CX38 | 36 +6 | 0.221 +0.01 | 287 -10.3 | 4.5 +0.4 | 100.2 +1 | close | + |
Compare the closest 3 against the K140 →
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.