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Beyma 6NMFW

6.5" · 8 Ω · 200 W · 87 dB · datasheet ↗

Thiele-Small parameters

Nominal size6.5"
Impedance8 Ω
Fs40 Hz
Qts0.34
Qes0.35
Qms7.5
Vas11 L
Sd154 cm²
Xmax9 mm
Re5.8 Ω
Bl14 T·m
Mms45 g
Pe200 W
Sensitivity87 dB

Alignment hint

EBP114 · 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

DriverFs (Hz)QtsVas (L)Xmax (mm)Sens (dB)FitNotesCompare
Beyma 6"P200/ND56 +160.29 -0.0511.9 +0.95.5 -3.592 +5riskyXmax 5.5 mm < 9 mm: lower excursion-limited SPL+
Sica 6.5 H 1.5 CP45.4 +5.40.42 +0.0820.2 +9.26 -389.4 +2.4risky120 W vs 200 W: lower power handling · Xmax 6 mm < 9 mm: lower excursion-limited SPL+
Oberton 6B15055.04 +15.040.292 -0.0514.61 +3.615.5 -3.592 +5risky150 W vs 200 W: lower power handling · Xmax 5.5 mm < 9 mm: lower excursion-limited SPL+
Beyma 6P200Fe58 +180.26 -0.0811.1 +0.15 -493 +6riskyXmax 5 mm < 9 mm: lower excursion-limited SPL+
Oberton 6NB15062.32 +22.320.28 -0.069.3 -1.75.5 -3.592 +5risky150 W vs 200 W: lower power handling · Xmax 5.5 mm < 9 mm: lower excursion-limited SPL+
18 Sound 6ND43061 +210.27 -0.0712.6 +1.65 -492.5 +5.5riskyXmax 5 mm < 9 mm: lower excursion-limited SPL+
18 Sound 6ND43066 +260.3 -0.0412.6 +1.65 -494 +7risky16 Ω vs 8 Ω: amp load changes · Xmax 5 mm < 9 mm: lower excursion-limited SPL+
Beyma 6P200Fe66 +260.35 +0.018.8 -2.24 -593 +6risky16 Ω vs 8 Ω: amp load changes · Xmax 4 mm < 9 mm: lower excursion-limited SPL+
B&C 6NDL3869 +290.39 +0.057.1 -3.96 -391 +4risky4 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/P56 +160.5 +0.1615.6 +4.65.5 -3.590 +3risky50 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.