Altec 604-8K
Thiele-Small parameters
| Nominal size | 15" |
|---|---|
| Impedance | 8 Ω |
| Fs | 28.5 Hz |
| Qts | 0.204 |
| Qes | 0.21 |
| Qms | 7.5 |
| Vas | 412.9 L |
| Sd | 825.8 cm² |
| Xmax | 3.8 mm |
| Re | 6.4 Ω |
| Bl | 19.9 T·m |
| Mms | 72.2 g |
| Pe | 100 W |
| Sensitivity | 99.5 dB |
Alignment hint
| EBP | 136 · ported |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 37.5 L |
EBP > 100: favours a ported (bass-reflex) 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 |
|---|---|---|---|---|---|---|---|---|
| Altec 604-2 | 27.1 -1.4 | 0.213 +0.01 | 446 +33.1 | 3.8 = | 98.6 -0.9 | close | + | |
| Altec 604-E | 27.1 -1.4 | 0.213 +0.01 | 446 +33.1 | 3.8 = | 98.6 -0.9 | close | + | |
| Great Plains Audio 604-D | 27.1 -1.4 | 0.213 +0.01 | 446 +33.1 | 3.8 = | 98.6 -0.9 | close | + | |
| Fostex L 470 | 25 -3.5 | 0.203 = | 457 +44.1 | 4.2 +0.4 | 98 -1.5 | close | + | |
| Davis 40RCA15 vp3 | 26.2 -2.3 | 0.218 +0.01 | 380.7 -32.2 | 5 +1.2 | 98.6 -0.9 | close | + | |
| Supravox 400-2000EXC_15V | 25 -3.5 | 0.196 -0.01 | 429 +16.1 | 4.9 +1.1 | 98.1 -1.4 | close | + | |
| Supravox 400-2000EXC_14V | 25 -3.5 | 0.214 +0.01 | 439 +26.1 | 5 +1.2 | 97.8 -1.7 | close | + | |
| Altec 515-8LFE | 25.7 -2.8 | 0.203 = | 547.7 +134.8 | 4.3 +0.5 | 99.9 +0.4 | close | + | |
| JBL K140 | 30 +1.5 | 0.211 +0.01 | 297.3 -115.6 | 4.1 +0.3 | 99.2 -0.3 | close | + | |
| Audax PR380M2 v2009 | 25 -3.5 | 0.191 -0.01 | 380 -32.9 | 5.5 +1.7 | 98.2 -1.3 | close | + |
Compare the closest 3 against the 604-8K →
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.