18 Sound 8NW650
Thiele-Small parameters
| Nominal size | 8" |
|---|---|
| Impedance | 8 Ω |
| Fs | 63 Hz |
| Qts | 0.25 |
| Qes | 0.27 |
| Qms | 3.7 |
| Vas | 17.8 L |
| Sd | 230 cm² |
| Xmax | 5.5 mm |
| Re | 6.1 Ω |
| Bl | 15.2 T·m |
| Mms | 26 g |
| Pe | 300 W |
| Sensitivity | 96 dB |
Alignment hint
| EBP | 233 · ported |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 2.5 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 8NW650 | 62 -1 | 0.25 = | 18.99 +1.19 | 5.5 = | 95 -1 | close | 16 Ω vs 8 Ω: amp load changes | + |
| Beyma 8"MC300Nd | 62 -1 | 0.22 -0.03 | 18 +0.2 | 6 +0.5 | 96 = | close | + | |
| B&C 8MDN51 | 68 +5 | 0.27 +0.02 | 17.5 -0.3 | 6 +0.5 | 97 +1 | close | 16 Ω vs 8 Ω: amp load changes · 200 W vs 300 W: lower power handling | + |
| Beyma 8WR300 | 65 +2 | 0.27 +0.02 | 15 -2.8 | 6 +0.5 | 95 -1 | close | + | |
| B&C 8FMB51 | 67 +4 | 0.28 +0.03 | 20.7 +2.9 | 5.5 = | 96.5 +0.5 | close | + | |
| Beyma 8WRS300 | 65 +2 | 0.28 +0.03 | 15 -2.8 | 6 +0.5 | 95 -1 | close | + | |
| Faital PRO 8PR210 | 65 +2 | 0.29 +0.04 | 15.4 -2.4 | 6.92 +1.42 | 95 -1 | close | 200 W vs 300 W: lower power handling | + |
| B&C 8MBX51 | 60 -3 | 0.29 +0.04 | 23 +5.2 | 6 +0.5 | 96.5 +0.5 | usable | 200 W vs 300 W: lower power handling | + |
| B&C 8CLA64 | 71 +8 | 0.24 -0.01 | 12.5 -5.3 | 5.3 -0.2 | 96 = | usable | Xmax 5.3 mm < 5.5 mm: lower excursion-limited SPL | + |
| Sica 8 K 3 PL | 68.1 +5.1 | 0.25 = | 12.2 -5.6 | 5 -0.5 | 95.1 -0.9 | usable | Xmax 5 mm < 5.5 mm: lower excursion-limited SPL | + |
Compare the closest 3 against the 8NW650 →
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.