JBL LCS1250W
Thiele-Small parameters
| Nominal size | 12" |
|---|---|
| Impedance | 4 Ω |
| Fs | 27.4 Hz |
| Qts | 0.331 |
| Qes | 0.37 |
| Qms | 3.18 |
| Vas | 109 L |
| Sd | 499.4 cm² |
| Xmax | 5.3 mm |
| Re | 3.45 Ω |
| Bl | 13.2 T·m |
| Mms | 108.2 g |
| Pe | 120 W |
| Sensitivity | 93.5 dB |
Alignment hint
| EBP | 74 · flexible |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 30.6 L |
EBP 50-100: works in either a sealed or ported 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 |
|---|---|---|---|---|---|---|---|---|
| Atohm D300P04 | 26.5 -0.9 | 0.33 = | 104 -5 | 7 +1.7 | 93 -0.5 | close | + | |
| Helix HXS 1206 | 25 -2.4 | 0.337 +0.01 | 107 -2 | 7 +1.7 | 93.6 +0.1 | close | + | |
| Dayton Audio SD315-88 | 26.9 -0.5 | 0.342 +0.01 | 122.8 +13.8 | 5.5 +0.2 | 94.2 +0.7 | close | + | |
| Dali A-12WD vp | 27 -0.4 | 0.328 = | 121 +12 | 8.8 +3.5 | 93.3 -0.2 | close | 8 Ω vs 4 Ω: amp load changes | + |
| Mivoc AW 3000 | 27 -0.4 | 0.305 -0.03 | 97 -12 | 5.9 +0.6 | 93.9 +0.4 | close | + | |
| SICA 12 SR 3 PL vp | 28.7 +1.3 | 0.317 -0.01 | 101.2 -7.8 | 7 +1.7 | 92.4 -1.1 | close | 8 Ω vs 4 Ω: amp load changes | + |
| Oxygen IN12 300 | 27 -0.4 | 0.362 +0.03 | 114.8 +5.8 | 8.7 +3.4 | 93.2 -0.3 | close | + | |
| Focal AUDIOM 13KX | 28.8 +1.4 | 0.328 = | 127 +18 | 6 +0.7 | 92.3 -1.2 | close | 8 Ω vs 4 Ω: amp load changes | + |
| Focal 13 VX | 30 +2.6 | 0.323 -0.01 | 117 +8 | 6.8 +1.5 | 92.5 -1 | close | 8 Ω vs 4 Ω: amp load changes | + |
| Dayton Audio QU4TRO 12" | 27 -0.4 | 0.357 +0.03 | 120.1 +11.1 | 8.7 +3.4 | 93.6 +0.1 | close | + |
Compare the closest 3 against the LCS1250W →
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.