Altec 617-8A v2
Thiele-Small parameters
| Nominal size | 12" |
|---|---|
| Impedance | 8 Ω |
| Fs | 29 Hz |
| Qts | 0.162 |
| Qes | 0.17 |
| Qms | 3.38 |
| Vas | 220.9 L |
| Sd | 503.2 cm² |
| Xmax | 1.3 mm |
| Re | 6.4 Ω |
| Bl | 18.2 T·m |
| Mms | 48.4 g |
| Pe | 60 W |
| Sensitivity | 98 dB |
Alignment hint
| EBP | 171 · ported |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 12.2 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 617-8A v1 | 28.8 -0.2 | 0.165 = | 248.1 +27.2 | 1.3 = | 98.4 +0.4 | close | + | |
| Audax PR33S66 | 30 +1 | 0.169 +0.01 | 214.4 -6.5 | 3.8 +2.5 | 98.2 +0.2 | close | + | |
| Fluxmag 1201-LB | 28.9 -0.1 | 0.163 = | 196.2 -24.7 | 4 +2.7 | 98.4 +0.4 | close | + | |
| EMS B12 MKII | 30 +1 | 0.174 +0.01 | 227 +6.1 | 4.6 +3.3 | 98.3 +0.3 | close | + | |
| EMS B12 | 31 +2 | 0.168 +0.01 | 227 +6.1 | 4.4 +3.1 | 98.8 +0.8 | close | + | |
| RCF L 12P24 | 31 +2 | 0.145 -0.02 | 205 -15.9 | 2 +0.7 | 99 +1 | close | + | |
| Altec 414-8E | 30.3 +1.3 | 0.195 +0.03 | 224 +3.1 | 4 +2.7 | 97.9 -0.1 | usable | + | |
| Altec 414-8C | 30.2 +1.2 | 0.204 +0.04 | 230.2 +9.3 | 4 +2.7 | 97.5 -0.5 | usable | + | |
| Fertin Acoustics 30EXM8 | 23.7 -5.3 | 0.147 -0.02 | 250 +29.1 | 3 +1.7 | 96.5 -1.5 | usable | + | |
| Audax PR330M0 v2014 | 26 -3 | 0.203 +0.04 | 208 -12.9 | 4 +2.7 | 95.6 -2.4 | usable | + |
Compare the closest 3 against the 617-8A v2 →
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.