Davis 38RPA
Thiele-Small parameters
| Nominal size | 15" |
|---|---|
| Impedance | 8 Ω |
| Fs | 20.7 Hz |
| Qts | 0.28 |
| Qes | 0.304 |
| Qms | 3.47 |
| Vas | 459 L |
| Sd | 804.2 cm² |
| Xmax | 4 mm |
| Re | 7.4 Ω |
| Bl | 19.2 T·m |
| Mms | 116.8 g |
| Pe | 200 W |
| Sensitivity | 93.6 dB |
Alignment hint
| EBP | 68 · flexible |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 85.4 L |
EBP 50-100: works in either a sealed or ported 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 |
|---|---|---|---|---|---|---|---|---|
| AE Speakers TD15H | 21 +0.3 | 0.254 -0.03 | 467 +8 | 7 +3 | 94.9 +1.3 | close | + | |
| AE Speakers TD15H-8 | 21 +0.3 | 0.254 -0.03 | 467 +8 | 7 +3 | 94.9 +1.3 | close | + | |
| Supravox 400-2000 | 23 +2.3 | 0.272 -0.01 | 450 -9 | 5 +1 | 95.8 +2.2 | close | 120 W vs 200 W: lower power handling | + |
| JBL 2235H | 20 -0.7 | 0.252 -0.03 | 458.7 -0.3 | 8.4 +4.4 | 94.4 +0.8 | close | + | |
| Audiotechnology FLEXUNIT 15 F 102 25 10 KAP | 22 +1.3 | 0.29 +0.01 | 410 -49 | 8.6 +4.6 | 93.5 -0.1 | close | + | |
| Monacor SP-400HT | 21 +0.3 | 0.241 -0.04 | 410 -49 | 4 = | 94.8 +1.2 | close | 150 W vs 200 W: lower power handling | + |
| Altec 927-8A | 22.9 +2.2 | 0.278 = | 496.1 +37.1 | 8.3 +4.3 | 95.1 +1.5 | close | + | |
| Monacor SP-380P | 23 +2.3 | 0.27 -0.01 | 505 +46 | 4 = | 96.4 +2.8 | close | + | |
| Audiotechnology 15F1022510KAP | 22 +1.3 | 0.288 +0.01 | 410 -49 | 8.5 +4.5 | 94.9 +1.3 | close | + | |
| AE Speakers TD15X 8 Ohms | 23.2 +2.5 | 0.287 +0.01 | 467 +8 | 7 +3 | 96.3 +2.7 | close | + |
Compare the closest 3 against the 38RPA →
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.