Beyma 6NMFW
Thiele-Small parameters
| Nominal size | 6.5" |
|---|---|
| Impedance | 8 Ω |
| Fs | 40 Hz |
| Qts | 0.34 |
| Qes | 0.35 |
| Qms | 7.5 |
| Vas | 11 L |
| Sd | 154 cm² |
| Xmax | 9 mm |
| Re | 5.8 Ω |
| Bl | 14 T·m |
| Mms | 45 g |
| Pe | 200 W |
| Sensitivity | 87 dB |
Alignment hint
| EBP | 114 · ported |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 3.3 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 |
|---|---|---|---|---|---|---|---|---|
| Beyma 6"P200/ND | 56 +16 | 0.29 -0.05 | 11.9 +0.9 | 5.5 -3.5 | 92 +5 | risky | Xmax 5.5 mm < 9 mm: lower excursion-limited SPL | + |
| Sica 6.5 H 1.5 CP | 45.4 +5.4 | 0.42 +0.08 | 20.2 +9.2 | 6 -3 | 89.4 +2.4 | risky | 120 W vs 200 W: lower power handling · Xmax 6 mm < 9 mm: lower excursion-limited SPL | + |
| Oberton 6B150 | 55.04 +15.04 | 0.292 -0.05 | 14.61 +3.61 | 5.5 -3.5 | 92 +5 | risky | 150 W vs 200 W: lower power handling · Xmax 5.5 mm < 9 mm: lower excursion-limited SPL | + |
| Beyma 6P200Fe | 58 +18 | 0.26 -0.08 | 11.1 +0.1 | 5 -4 | 93 +6 | risky | Xmax 5 mm < 9 mm: lower excursion-limited SPL | + |
| Oberton 6NB150 | 62.32 +22.32 | 0.28 -0.06 | 9.3 -1.7 | 5.5 -3.5 | 92 +5 | risky | 150 W vs 200 W: lower power handling · Xmax 5.5 mm < 9 mm: lower excursion-limited SPL | + |
| 18 Sound 6ND430 | 61 +21 | 0.27 -0.07 | 12.6 +1.6 | 5 -4 | 92.5 +5.5 | risky | Xmax 5 mm < 9 mm: lower excursion-limited SPL | + |
| 18 Sound 6ND430 | 66 +26 | 0.3 -0.04 | 12.6 +1.6 | 5 -4 | 94 +7 | risky | 16 Ω vs 8 Ω: amp load changes · Xmax 5 mm < 9 mm: lower excursion-limited SPL | + |
| Beyma 6P200Fe | 66 +26 | 0.35 +0.01 | 8.8 -2.2 | 4 -5 | 93 +6 | risky | 16 Ω vs 8 Ω: amp load changes · Xmax 4 mm < 9 mm: lower excursion-limited SPL | + |
| B&C 6NDL38 | 69 +29 | 0.39 +0.05 | 7.1 -3.9 | 6 -3 | 91 +4 | risky | 4 Ω vs 8 Ω: amp load changes · 150 W vs 200 W: lower power handling · Xmax 6 mm < 9 mm: lower excursion-limited SPL | + |
| Beyma 6"B30/P | 56 +16 | 0.5 +0.16 | 15.6 +4.6 | 5.5 -3.5 | 90 +3 | risky | 50 W vs 200 W: lower power handling · Xmax 5.5 mm < 9 mm: lower excursion-limited SPL | + |
Compare the closest 3 against the 6NMFW →
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.