Usher Audio 1503HM
Thiele-Small parameters
| Nominal size | 15" |
|---|---|
| Impedance | 8 Ω |
| Fs | 21 Hz |
| Qts | 0.222 |
| Qes | 0.231 |
| Qms | 5.906 |
| Vas | 528.8 L |
| Sd | 881 cm² |
| Xmax | 5.5 mm |
| Re | 5.1 Ω |
| Bl | 18.6 T·m |
| Mms | 118.2 g |
| Pe | 150 W |
| Sensitivity | 97.2 dB |
Alignment hint
| EBP | 91 · flexible |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 57.8 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 |
|---|---|---|---|---|---|---|---|---|
| TAD TL-1602 | 21 = | 0.212 -0.01 | 519 -9.8 | 5.5 = | 96.3 -0.9 | close | + | |
| TAD TL-1602 A | 21 = | 0.212 -0.01 | 519 -9.8 | 5.5 = | 96.3 -0.9 | close | + | |
| Davis 40RCA15 vp1 | 21 = | 0.231 +0.01 | 450 -78.8 | 5 -0.5 | 96.7 -0.5 | close | Xmax 5 mm < 5.5 mm: lower excursion-limited SPL | + |
| Monacor SP-400HT v2 | 22 +1 | 0.241 +0.02 | 510 -18.8 | 5 -0.5 | 96.3 -0.9 | close | Xmax 5 mm < 5.5 mm: lower excursion-limited SPL | + |
| JBL 2234H | 23 +2 | 0.222 = | 458.7 -70.1 | 5.1 -0.4 | 96.7 -0.5 | close | Xmax 5.1 mm < 5.5 mm: lower excursion-limited SPL | + |
| Fluxmag 1504B | 22.5 +1.5 | 0.224 = | 433.8 -95 | 7.3 +1.8 | 97 -0.2 | close | + | |
| AE Speakers TD15H-4 | 21 = | 0.254 +0.03 | 467 -61.8 | 7 +1.5 | 97.6 +0.4 | close | 4 Ω vs 8 Ω: amp load changes | + |
| Supravox 400 GMF MK2 | 22 +1 | 0.206 -0.02 | 633 +104.2 | 7 +1.5 | 97.9 +0.7 | close | + | |
| Gauss 4583F | 22 +1 | 0.197 -0.02 | 432 -96.8 | 6.3 +0.8 | 97.1 -0.1 | close | + | |
| Monacor SPH-390TC 8 Ohms | 22 +1 | 0.272 +0.05 | 531 +2.2 | 7 +1.5 | 96.1 -1.1 | close | + |
Compare the closest 3 against the 1503HM →
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.