Davis 40XXXL
Thiele-Small parameters
| Nominal size | 15" |
|---|---|
| Impedance | 8 Ω |
| Fs | 35.6 Hz |
| Qts | 0.287 |
| Qes | 0.298 |
| Qms | 7.896 |
| Vas | 211.1 L |
| Sd | 804.4 cm² |
| Xmax | 5.5 mm |
| Re | 4.84 Ω |
| Bl | 17.7 T·m |
| Mms | 85.8 g |
| Pe | 250 W |
| Sensitivity | 99.2 dB |
Alignment hint
| EBP | 119 · ported |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 41.6 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 |
|---|---|---|---|---|---|---|---|---|
| DAS Audio 15H | 35 -0.6 | 0.287 = | 203 -8.1 | 6 +0.5 | 97.8 -1.4 | close | + | |
| Audax LFP504 | 36 +0.4 | 0.282 -0.01 | 193 -18.1 | 5.5 = | 98.2 -1 | close | + | |
| Audax PR38ST350 | 36 +0.4 | 0.28 -0.01 | 193 -18.1 | 5.5 = | 98.3 -0.9 | close | + | |
| Audax PR38XT350 | 36 +0.4 | 0.28 -0.01 | 193 -18.1 | 5.5 = | 98.3 -0.9 | close | + | |
| Ciare 15.75 NdW vp | 37.7 +2.1 | 0.286 = | 215 +3.9 | 5 -0.5 | 99.7 +0.5 | close | Xmax 5 mm < 5.5 mm: lower excursion-limited SPL | + |
| 18 Sound 15W700 | 38 +2.4 | 0.3 +0.01 | 217 +5.9 | 6.5 +1 | 99 -0.2 | close | + | |
| Fane 15-400 | 37 +1.4 | 0.305 +0.02 | 210 -1.1 | 5 -0.5 | 99.1 -0.1 | close | Xmax 5 mm < 5.5 mm: lower excursion-limited SPL | + |
| Fane SOVEREIGN 15-400 | 37 +1.4 | 0.305 +0.02 | 210 -1.1 | 5 -0.5 | 99.1 -0.1 | close | Xmax 5 mm < 5.5 mm: lower excursion-limited SPL | + |
| Beyma 15WR400 v2020 | 36 +0.4 | 0.299 +0.01 | 236 +24.9 | 6.3 +0.8 | 99 -0.2 | close | + | |
| Beyma 15"WR400 | 36 +0.4 | 0.3 +0.01 | 236 +24.9 | 6.3 +0.8 | 99 -0.2 | close | + |
Compare the closest 3 against the 40XXXL →
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.