Great Plains Audio 604E-II v2012
Thiele-Small parameters
| Nominal size | 15" |
|---|---|
| Impedance | 8 Ω |
| Fs | 26.2 Hz |
| Qts | 0.301 |
| Qes | 0.315 |
| Qms | 6.654 |
| Vas | 415.2 L |
| Sd | 823.7 cm² |
| Xmax | 3.8 mm |
| Re | 7.31 Ω |
| Bl | 18 T·m |
| Mms | 84.3 g |
| Pe | 100 W |
| Sensitivity | 96.1 dB |
Alignment hint
| EBP | 83 · flexible |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 91.9 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 |
|---|---|---|---|---|---|---|---|---|
| Supravox 400-2000EXC_11V | 25 -1.2 | 0.308 +0.01 | 433 +17.8 | 5 +1.2 | 96.2 +0.1 | close | + | |
| Great Plains Audio 515-8C GPA | 27.8 +1.6 | 0.299 = | 422.5 +7.3 | 4.7 +0.9 | 97.6 +1.5 | close | 75 W vs 100 W: lower power handling | + |
| Davis 40RCA15 vp2 | 26.6 +0.4 | 0.309 +0.01 | 410 -5.2 | 5 +1.2 | 98.6 +2.5 | close | + | |
| Supravox 400 GMF | 26 -0.2 | 0.319 +0.02 | 489 +73.8 | 5 +1.2 | 97 +0.9 | close | + | |
| Beyma 15B100/R | 25 -1.2 | 0.317 +0.02 | 400 -15.2 | 3 -0.8 | 96.4 +0.3 | close | Xmax 3 mm < 3.8 mm: lower excursion-limited SPL | + |
| Altec 3154 | 25 -1.2 | 0.322 +0.02 | 393.6 -21.6 | 6.4 +2.6 | 95 -1.1 | close | + | |
| Great Plains Audio 3154 GPA | 25 -1.2 | 0.322 +0.02 | 393.6 -21.6 | 6.4 +2.6 | 95 -1.1 | close | + | |
| Focal 15VX | 24 -2.2 | 0.286 -0.02 | 380 -35.2 | 6 +2.2 | 95.3 -0.8 | close | + | |
| Usher Audio 15HM Studio | 27 +0.8 | 0.28 -0.02 | 385 -30.2 | 5.9 +2.1 | 98 +1.9 | close | + | |
| Davis 39GPA15 | 26.2 = | 0.338 +0.04 | 384 -31.2 | 7.5 +3.7 | 97 +0.9 | close | + |
Compare the closest 3 against the 604E-II v2012 →
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.