B&C 8FG51
Thiele-Small parameters
| Nominal size | 8" |
|---|---|
| Impedance | 8 Ω |
| Fs | 49 Hz |
| Qts | 0.32 |
| Qes | 0.34 |
| Qms | 9 |
| Vas | 20 L |
| Sd | 220 cm² |
| Xmax | 6.5 mm |
| Re | 5.1 Ω |
| Bl | 12.9 T·m |
| Mms | 35 g |
| Pe | 250 W |
| Sensitivity | 93 dB |
Alignment hint
| EBP | 144 · ported |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 5.2 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 |
|---|---|---|---|---|---|---|---|---|
| Faital PRO 8RS250 | 56 +7 | 0.32 = | 18.3 -1.7 | 6.92 +0.42 | 93 = | close | + | |
| Sica 8 S 2.5 CP | 54 +5 | 0.33 +0.01 | 18.6 -1.4 | 5 -1.5 | 93 = | close | Xmax 5 mm < 6.5 mm: lower excursion-limited SPL | + |
| B&C 8FG64 | 51 +2 | 0.31 -0.01 | 15 -5 | 7 +0.5 | 92 -1 | close | + | |
| Beyma 8"P300Fe/N | 53 +4 | 0.31 -0.01 | 24.8 +4.8 | 6 -0.5 | 94 +1 | close | Xmax 6 mm < 6.5 mm: lower excursion-limited SPL | + |
| B&C 8FG64 | 53 +4 | 0.35 +0.03 | 16.9 -3.1 | 7.5 +1 | 92 -1 | close | 16 Ω vs 8 Ω: amp load changes | + |
| B&C 8BG51 | 52 +3 | 0.4 +0.08 | 18 -2 | 6.5 = | 92 -1 | usable | + | |
| Faital PRO 8RS350 | 42 -7 | 0.3 -0.02 | 23.7 +3.7 | 7.37 +0.87 | 90 -3 | usable | + | |
| Faital PRO 8RS340 | 42 -7 | 0.34 +0.02 | 25.5 +5.5 | 7.33 +0.83 | 91 -2 | usable | + | |
| Oberton 8MB201 | 67.7 +18.7 | 0.314 -0.01 | 14.74 -5.26 | 7 +0.5 | 93 = | usable | + | |
| Faital PRO 8PR200 | 58 +9 | 0.37 +0.05 | 16.9 -3.1 | 8.15 +1.65 | 95 +2 | usable | + |
Compare the closest 3 against the 8FG51 →
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.