EMS LB12 MKII vp JTR1
Thiele-Small parameters
| Nominal size | 12" |
|---|---|
| Impedance | 8 Ω |
| Fs | 39 Hz |
| Qts | 0.543 |
| Qes | 0.606 |
| Qms | 5.262 |
| Vas | 162 L |
| Sd | 500 cm² |
| Xmax | 3 mm |
| Re | 7.89 Ω |
| Bl | 10.7 T·m |
| Mms | 36 g |
| Pe | 40 W |
| Sensitivity | 94.1 dB |
Alignment hint
| EBP | 64 · flexible |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 232.8 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 |
|---|---|---|---|---|---|---|---|---|
| EMS LB12 MKII vp JTR2 | 37.7 -1.3 | 0.548 +0.01 | 173.7 +11.7 | 3 = | 93.9 -0.2 | close | + | |
| Eminence LEGEND BP122 8 Ohms | 35 -4 | 0.537 -0.01 | 157.4 -4.6 | 6.2 +3.2 | 94.2 +0.1 | close | + | |
| Audax LFP501 | 40 +1 | 0.521 -0.02 | 138 -24 | 4.5 +1.5 | 94.6 +0.5 | close | + | |
| Audax PR30ST100 | 40 +1 | 0.521 -0.02 | 138 -24 | 4.5 +1.5 | 94.6 +0.5 | close | + | |
| LaVoce LBASS12-15 | 38 -1 | 0.48 -0.06 | 160.93 -1.07 | 4.7 +1.7 | 95.5 +1.4 | close | + | |
| Davis 31TCA12 vp rc1 d | 35 -4 | 0.53 -0.01 | 169.8 +7.8 | 6 +3 | 93.2 -0.9 | close | + | |
| MCM Electronics 55-1255 | 35 -4 | 0.554 +0.01 | 197.6 +35.6 | 3.5 +0.5 | 93 -1.1 | close | + | |
| Cabasse 30BZ24 vp oriu2 | 37 -2 | 0.543 = | 223 +61 | 4 +1 | 93.6 -0.5 | close | 16 Ω vs 8 Ω: amp load changes | + |
| Pioneer TS-A2503i vp | 41 +2 | 0.579 +0.04 | 162 = | 5 +2 | 98.2 +4.1 | close | 4 Ω vs 8 Ω: amp load changes | + |
| Celestion PULSE XL 12.20 | 35.1 -3.9 | 0.503 -0.04 | 153.3 -8.7 | 8.3 +5.3 | 94.2 +0.1 | close | + |
Compare the closest 3 against the LB12 MKII vp JTR1 →
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.