Infinity 1240W
Thiele-Small parameters
| Nominal size | 12" |
|---|---|
| Impedance | 4 Ω |
| Fs | 25.4 Hz |
| Qts | 0.469 |
| Qes | 0.5 |
| Qms | 7.62 |
| Vas | 84.4 L |
| Sd | 532 cm² |
| Xmax | 5.8 mm |
| Re | 3.4 Ω |
| Bl | 14.2 T·m |
| Mms | 184.6 g |
| Pe | 300 W |
| Sensitivity | 90.1 dB |
Alignment hint
| EBP | 51 · flexible |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 66.3 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 |
|---|---|---|---|---|---|---|---|---|
| Dayton Audio RSS315HF-4 | 25 -0.4 | 0.489 +0.02 | 85.1 +0.7 | 10.1 +4.3 | 89.4 -0.7 | close | + | |
| JBL CS1204 | 24.8 -0.6 | 0.429 -0.04 | 91.1 +6.7 | 6.3 +0.5 | 90.3 +0.2 | close | + | |
| Infinity 1262W DVC | 25 -0.4 | 0.457 -0.01 | 80.1 -4.3 | 6.5 +0.7 | 92.5 +2.4 | close | 2 Ω vs 4 Ω: amp load changes | + |
| JBL GTO 1264 | 26.7 +1.3 | 0.428 -0.04 | 83.1 -1.3 | 6.3 +0.5 | 91 +0.9 | close | + | |
| Morel PRIMO 12 | 28 +2.6 | 0.474 +0.01 | 85 +0.6 | 8 +2.2 | 91.5 +1.4 | close | + | |
| Nakamichi SP-W30S | 27.8 +2.4 | 0.464 = | 92.3 +7.9 | 6.6 +0.8 | 91.3 +1.2 | close | 200 W vs 300 W: lower power handling | + |
| JBL GT 120 | 24.8 -0.6 | 0.429 -0.04 | 91.1 +6.7 | 8.1 +2.3 | 90.3 +0.2 | close | + | |
| JBL GT 120MKII | 24.8 -0.6 | 0.429 -0.04 | 91.1 +6.7 | 8.1 +2.3 | 90.3 +0.2 | close | + | |
| JBL GT4-12 | 24.8 -0.6 | 0.429 -0.04 | 91.1 +6.7 | 8.1 +2.3 | 90.3 +0.2 | close | + | |
| Tymphany LAT 500-04 | 28 +2.6 | 0.474 +0.01 | 81 -3.4 | 7.7 +1.9 | 91.6 +1.5 | close | + |
Compare the closest 3 against the 1240W →
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.