18 Sound 8MB720
Thiele-Small parameters
| Nominal size | 8" |
|---|---|
| Impedance | 8 Ω |
| Fs | 108 Hz |
| Qts | 0.32 |
| Qes | 0.35 |
| Qms | 4.6 |
| Vas | 9 L |
| Sd | 227 cm² |
| Xmax | 2.25 mm |
| Re | 5.2 Ω |
| Bl | 13.4 T·m |
| Mms | 18 g |
| Pe | 250 W |
| Sensitivity | 99.5 dB |
Alignment hint
| EBP | 309 · ported |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 2.3 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 |
|---|---|---|---|---|---|---|---|---|
| 18 Sound 8MB710 | 108 = | 0.32 = | 9 = | 2.25 = | 99.5 = | close | + | |
| Oberton 8NM201 | 102.81 -5.19 | 0.286 -0.03 | 8.07 -0.93 | 2.75 +0.5 | 98 -1.5 | close | + | |
| LaVoce WAN082.01 | 85 -23 | 0.32 = | 9 = | 5.8 +3.55 | 96 -3.5 | usable | + | |
| Faital PRO 8PR155 | 85 -23 | 0.37 +0.05 | 9.4 +0.4 | 3.57 +1.32 | 97 -2.5 | usable | + | |
| BMS 8S215 | 87.7 -20.3 | 0.31 -0.01 | 11.04 +2.04 | 4.25 +2 | 96 -3.5 | usable | + | |
| BMS 8N515 | 87.7 -20.3 | 0.3 -0.02 | 11.04 +2.04 | 4 +1.75 | 96 -3.5 | usable | + | |
| LaVoce MAF082.00-16 | 88 -20 | 0.24 -0.08 | 10.89 +1.89 | 2.3 +0.05 | 98.5 -1 | usable | 16 Ω vs 8 Ω: amp load changes | + |
| B&C 8NDL64 | 80 -28 | 0.25 -0.07 | 9.6 +0.6 | 4.5 +2.25 | 97 -2.5 | usable | + | |
| 18 Sound 8M400F | 89 -19 | 0.26 -0.06 | 13.7 +4.7 | 3 +0.75 | 100.5 +1 | usable | + | |
| 18 Sound 8NMB750 | 91 -17 | 0.37 +0.05 | 7.3 -1.7 | 6.3 +4.05 | 95 -4.5 | usable | 16 Ω vs 8 Ω: amp load changes | + |
Compare the closest 3 against the 8MB720 →
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.