Altec 418-8LF vp CF2
Thiele-Small parameters
| Nominal size | 15" |
|---|---|
| Impedance | 8 Ω |
| Fs | 36.3 Hz |
| Qts | 0.254 |
| Qes | 0.288 |
| Qms | 2.139 |
| Vas | 230.3 L |
| Sd | 855.3 cm² |
| Xmax | 1.3 mm |
| Re | 5.19 Ω |
| Bl | 18.7 T·m |
| Mms | 85.4 g |
| Pe | 150 W |
| Sensitivity | 99.7 dB |
Alignment hint
| EBP | 126 · ported |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 34.1 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 |
|---|---|---|---|---|---|---|---|---|
| Tesla ARM 9408 | 35 -1.3 | 0.248 -0.01 | 260 +29.7 | 1.5 +0.2 | 99.6 -0.1 | close | 75 W vs 150 W: lower power handling | + |
| Altec 418-8LF vp CF1 | 39 +2.7 | 0.275 +0.02 | 211 -19.3 | 1.3 = | 99.9 +0.2 | close | + | |
| Altec 421-8H-II | 38.7 +2.4 | 0.242 -0.01 | 261.4 +31.1 | 1.3 = | 101.1 +1.4 | close | + | |
| Monacor SP-15/300PA | 38 +1.7 | 0.275 +0.02 | 232 +1.7 | 3 +1.7 | 99.1 -0.6 | close | + | |
| Audax PR38LEX100VST | 38.7 +2.4 | 0.258 = | 221.1 -9.2 | 4 +2.7 | 100.1 +0.4 | close | + | |
| LaVoce WAF153.02 | 35 -1.3 | 0.261 +0.01 | 244 +13.7 | 4.6 +3.3 | 99.7 = | close | + | |
| Celestion NTR15-3018E | 35 -1.3 | 0.261 +0.01 | 223.5 -6.8 | 5 +3.7 | 99.2 -0.5 | close | + | |
| Beyma 380 MSPA | 36 -0.3 | 0.246 -0.01 | 242.2 +11.9 | 3.6 +2.3 | 97.8 -1.9 | close | + | |
| Altec 3156 | 38 +1.7 | 0.24 -0.01 | 246.4 +16.1 | 3.8 +2.5 | 99.8 +0.1 | close | + | |
| Great Plains Audio 3156 GPA | 38 +1.7 | 0.24 -0.01 | 246.4 +16.1 | 3.8 +2.5 | 99.8 +0.1 | close | + |
Compare the closest 3 against the 418-8LF vp CF2 →
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.