Radian 5215B
Thiele-Small parameters
| Nominal size | 15" |
|---|---|
| Impedance | 8 Ω |
| Fs | 39 Hz |
| Qts | 0.313 |
| Qes | 0.346 |
| Qms | 3.243 |
| Vas | 192.4 L |
| Sd | 883.9 cm² |
| Xmax | 5.5 mm |
| Re | 5.9 Ω |
| Bl | 19.9 T·m |
| Mms | 94.8 g |
| Pe | 625 W |
| Sensitivity | 98.5 dB |
Alignment hint
| EBP | 113 · ported |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 46.9 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 |
|---|---|---|---|---|---|---|---|---|
| Radian 5215 B-8 | 38.7 -0.3 | 0.316 = | 189.7 -2.7 | 5.5 = | 98.2 -0.3 | close | + | |
| Fane SOVEREIGN PRO 15-500 | 40 +1 | 0.319 +0.01 | 192 -0.4 | 6 +0.5 | 99.4 +0.9 | close | + | |
| Audax PR38ST250 | 38 -1 | 0.311 = | 193 +0.6 | 4.9 -0.6 | 98.4 -0.1 | close | 250 W vs 625 W: lower power handling · Xmax 4.9 mm < 5.5 mm: lower excursion-limited SPL | + |
| PHL Audio 5100 | 39 = | 0.297 -0.02 | 180 -12.4 | 5.6 +0.1 | 98.8 +0.3 | close | 400 W vs 625 W: lower power handling | + |
| RCF L 15L601 | 38 -1 | 0.305 -0.01 | 190 -2.4 | 5 -0.5 | 97.9 -0.6 | close | Xmax 5 mm < 5.5 mm: lower excursion-limited SPL | + |
| 18 Sound 15ND830 | 39 = | 0.32 +0.01 | 213 +20.6 | 6.5 +1 | 98 -0.5 | close | 450 W vs 625 W: lower power handling | + |
| PHL Audio 5102 | 36 -3 | 0.306 -0.01 | 190 -2.4 | 6.1 +0.6 | 97.8 -0.7 | close | 400 W vs 625 W: lower power handling | + |
| B&C 15CLA76 | 40 +1 | 0.3 -0.01 | 176 -16.4 | 5.5 = | 99 +0.5 | close | 350 W vs 625 W: lower power handling | + |
| LaVoce WAF154.03 | 38 -1 | 0.29 -0.02 | 188 -4.4 | 5.2 -0.3 | 98.6 +0.1 | close | Xmax 5.2 mm < 5.5 mm: lower excursion-limited SPL | + |
| RCF MB 15X301 | 38 -1 | 0.345 +0.03 | 195 +2.6 | 6 +0.5 | 98.3 -0.2 | close | + |
Compare the closest 3 against the 5215B →
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.