JBL 2145A
Thiele-Small parameters
| Nominal size | 12" |
|---|---|
| Impedance | 8 Ω |
| Fs | 30 Hz |
| Qts | 0.508 |
| Qes | 0.53 |
| Qms | 12 |
| Vas | 155.7 L |
| Sd | 438.1 cm² |
| Xmax | 3.6 mm |
| Re | 5 Ω |
| Bl | 9.3 T·m |
| Mms | 48.6 g |
| Pe | 50 W |
| Sensitivity | 93 dB |
Alignment hint
| EBP | 57 · flexible |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 166.1 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 |
|---|---|---|---|---|---|---|---|---|
| JBL LE12C | 30 = | 0.508 = | 155.7 = | 3.6 = | 93 = | close | + | |
| Eminence ACOUSTINATOR N2012 | 31 +1 | 0.518 +0.01 | 177 +21.3 | 3.9 +0.3 | 92.4 -0.6 | close | + | |
| Selenium STREET BASS 12W2A | 30 = | 0.46 -0.05 | 164 +8.3 | 3.75 +0.15 | 91.5 -1.5 | close | 4 Ω vs 8 Ω: amp load changes | + |
| Beyma 12BR70 v2014 | 31 +1 | 0.497 -0.01 | 142 -13.7 | 6 +2.4 | 92.3 -0.7 | close | + | |
| Beyma 12BR70 v2015 | 31 +1 | 0.497 -0.01 | 142 -13.7 | 6 +2.4 | 92.3 -0.7 | close | + | |
| Beyma 12"BR70 | 31 +1 | 0.5 -0.01 | 142 -13.7 | 8 +4.4 | 93 = | close | + | |
| Infinity KAPPA CS 120 LB | 29 -1 | 0.485 -0.02 | 161.4 +5.7 | 6.7 +3.1 | 94.3 +1.3 | close | 4 Ω vs 8 Ω: amp load changes | + |
| Peerless SLS12 830669 v2012 | 31 +1 | 0.536 +0.03 | 132.4 -23.3 | 6.1 +2.5 | 91.9 -1.1 | close | + | |
| Davis 31TCA12 vp rc1 d | 35 +5 | 0.53 +0.02 | 169.8 +14.1 | 6 +2.4 | 93.2 +0.2 | close | + | |
| Celestion PULSE XL 12.20 | 35.1 +5.1 | 0.503 -0.01 | 153.3 -2.4 | 8.3 +4.7 | 94.2 +1.2 | close | + |
Compare the closest 3 against the 2145A →
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.