B&C 8PS21
Thiele-Small parameters
| Nominal size | 8" |
|---|---|
| Impedance | 8 Ω |
| Fs | 73 Hz |
| Qts | 0.33 |
| Qes | 0.36 |
| Qms | 4.2 |
| Vas | 14 L |
| Sd | 220 cm² |
| Xmax | 5 mm |
| Re | 5.4 Ω |
| Bl | 12.6 T·m |
| Mms | 23 g |
| Pe | 200 W |
| Sensitivity | 94 dB |
Alignment hint
| EBP | 203 · ported |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 3.9 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 |
|---|---|---|---|---|---|---|---|---|
| Oberton 8MB201 | 67.7 -5.3 | 0.314 -0.02 | 14.74 +0.74 | 7 +2 | 93 -1 | close | + | |
| B&C 8NDL51 | 66 -7 | 0.37 +0.04 | 14 = | 7 +2 | 94 = | close | + | |
| Faital PRO 8PR210 | 65 -8 | 0.34 +0.01 | 15.7 +1.7 | 7.17 +2.17 | 94 = | close | 16 Ω vs 8 Ω: amp load changes | + |
| Faital PRO 8FE300 | 70 -3 | 0.41 +0.08 | 14 = | 5.47 +0.47 | 93 -1 | close | 4 Ω vs 8 Ω: amp load changes | + |
| Sica 8 Fe 2 CP | 67 -6 | 0.32 -0.01 | 16.9 +2.9 | 4.5 -0.5 | 94.6 +0.6 | close | Xmax 4.5 mm < 5 mm: lower excursion-limited SPL | + |
| LaVoce WSF081.82 | 79 +6 | 0.38 +0.05 | 14.3 +0.3 | 4.6 -0.4 | 95.5 +1.5 | close | 150 W vs 200 W: lower power handling · Xmax 4.6 mm < 5 mm: lower excursion-limited SPL | + |
| Beyma 8"G40 | 70 -3 | 0.36 +0.03 | 17 +3 | 6.5 +1.5 | 95 +1 | close | + | |
| 18 Sound 8MB500 | 73 = | 0.36 +0.03 | 18.4 +4.4 | 6 +1 | 95 +1 | close | 4 Ω vs 8 Ω: amp load changes | + |
| BMS 8N519 | 74.9 +1.9 | 0.37 +0.04 | 10.9 -3.1 | 6.3 +1.3 | 94 = | close | + | |
| LaVoce WAF082.00 | 78 +5 | 0.37 +0.04 | 11.92 -2.08 | 6.3 +1.3 | 95 +1 | close | + |
Compare the closest 3 against the 8PS21 →
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.