18 Sound 8MB500
Thiele-Small parameters
| Nominal size | 8" |
|---|---|
| Impedance | 4 Ω |
| Fs | 73 Hz |
| Qts | 0.36 |
| Qes | 0.42 |
| Qms | 2.56 |
| Vas | 18.4 L |
| Sd | 230 cm² |
| Xmax | 6 mm |
| Re | 2.6 Ω |
| Bl | 7.2 T·m |
| Mms | 18 g |
| Pe | 280 W |
| Sensitivity | 95 dB |
Alignment hint
| EBP | 174 · ported |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 6.4 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 |
|---|---|---|---|---|---|---|---|---|
| Beyma 8"G40 | 70 -3 | 0.36 = | 17 -1.4 | 6.5 +0.5 | 95 = | close | 8 Ω vs 4 Ω: amp load changes | + |
| 18 Sound 8MB500 | 74 +1 | 0.43 +0.07 | 21.5 +3.1 | 6 = | 95 = | close | 8 Ω vs 4 Ω: amp load changes | + |
| B&C 8FMB51 | 68 -5 | 0.39 +0.03 | 20.5 +2.1 | 5.5 -0.5 | 96 +1 | close | 16 Ω vs 4 Ω: amp load changes · Xmax 5.5 mm < 6 mm: lower excursion-limited SPL | + |
| B&C 8MBX51 | 68 -5 | 0.38 +0.02 | 22 +3.6 | 6 = | 97 +2 | close | 16 Ω vs 4 Ω: amp load changes · 200 W vs 280 W: lower power handling | + |
| Faital PRO 8PR200 | 58 -15 | 0.37 +0.01 | 16.9 -1.5 | 8.15 +2.15 | 95 = | close | 8 Ω vs 4 Ω: amp load changes · 200 W vs 280 W: lower power handling | + |
| Faital PRO 8PR210 | 65 -8 | 0.34 -0.02 | 15.7 -2.7 | 7.17 +1.17 | 94 -1 | close | 16 Ω vs 4 Ω: amp load changes · 200 W vs 280 W: lower power handling | + |
| B&C 8NDL51 | 66 -7 | 0.37 +0.01 | 14 -4.4 | 7 +1 | 94 -1 | usable | 8 Ω vs 4 Ω: amp load changes · 200 W vs 280 W: lower power handling | + |
| 18 Sound 8MB400 | 64 -9 | 0.38 +0.02 | 23.9 +5.5 | 5.8 -0.2 | 95 = | usable | 8 Ω vs 4 Ω: amp load changes · Xmax 5.8 mm < 6 mm: lower excursion-limited SPL | + |
| LaVoce WAF082.00 | 78 +5 | 0.37 +0.01 | 11.92 -6.48 | 6.3 +0.3 | 95 = | usable | 8 Ω vs 4 Ω: amp load changes · 200 W vs 280 W: lower power handling | + |
| Faital PRO 8FE300 | 70 -3 | 0.44 +0.08 | 15.7 -2.7 | 5.52 -0.48 | 95 = | usable | 8 Ω vs 4 Ω: amp load changes · Xmax 5.52 mm < 6 mm: lower excursion-limited SPL | + |
Compare the closest 3 against the 8MB500 →
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.