Altec 418-8LF
Thiele-Small parameters
| Nominal size | 15" |
|---|---|
| Impedance | 8 Ω |
| Fs | 39.5 Hz |
| Qts | 0.322 |
| Qes | 0.37 |
| Qms | 2.51 |
| Vas | 279.8 L |
| Sd | 825.8 cm² |
| Xmax | 1.3 mm |
| Re | 5.5 Ω |
| Bl | 14.3 T·m |
| Mms | 55.5 g |
| Pe | 150 W |
| Sensitivity | 100.3 dB |
Alignment hint
| EBP | 107 · ported |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 73.2 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 |
|---|---|---|---|---|---|---|---|---|
| Monacor SP-38/200PA | 38 -1.5 | 0.294 -0.03 | 287 +7.2 | 2 +0.7 | 100.3 = | close | + | |
| B&C 15 PH 40 | 38 -1.5 | 0.334 +0.01 | 244 -35.8 | 3.5 +2.2 | 99.6 -0.7 | close | + | |
| Eminence KAPPA 15 | 36 -3.5 | 0.301 -0.02 | 278 -1.8 | 5.5 +4.2 | 100.1 -0.2 | close | + | |
| Fostex L 467 B | 40 +0.5 | 0.339 +0.02 | 245 -34.8 | 4.4 +3.1 | 99.2 -1.1 | close | + | |
| Fostex L 467 | 40 +0.5 | 0.339 +0.02 | 243.5 -36.3 | 4.4 +3.1 | 99.2 -1.1 | usable | + | |
| Visaton BGS 40 v1 | 38 -1.5 | 0.306 -0.02 | 263 -16.8 | 4.6 +3.3 | 98.5 -1.8 | usable | + | |
| Altec 418-8H | 44.8 +5.3 | 0.293 -0.03 | 242.4 -37.4 | 1.3 = | 101.8 +1.5 | usable | + | |
| JBL 2135 | 40 +0.5 | 0.253 -0.07 | 297.3 +17.5 | 1.5 +0.2 | 101.5 +1.2 | usable | + | |
| Eminence VORTEX 15 | 39.3 -0.2 | 0.321 = | 219.7 -60.1 | 5.5 +4.2 | 100 -0.3 | usable | + | |
| Altec 418-8LF vp CF1 | 39 -0.5 | 0.275 -0.05 | 211 -68.8 | 1.3 = | 99.9 -0.4 | usable | + |
Compare the closest 3 against the 418-8LF →
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.