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Eminence NSW6021-6

21.5" · 4 Ω · 2500 W · 97.7 dB · datasheet ↗

Thiele-Small parameters

Nominal size21.5"
Impedance4 Ω
Fs29 Hz
Qts0.304
Qes0.31
Qms15.35
Vas224.6 L
Sd1642 cm²
Xmax10.3 mm
Re3.8 Ω
Bl33.6 T·m
Mms506.9 g
Pe2500 W
Sensitivity97.7 dB

Alignment hint

EBP94 · flexible
Sealed Vb (Qtc ≈ 0.71)≈ 50.9 L

EBP 50-100: works in either a sealed or ported 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
Ciare NDK 21-428.5 -0.50.322 +0.02232.4 +7.88 -2.397.4 -0.3close1500 W vs 2500 W: lower power handling · Xmax 8 mm < 10.3 mm: lower excursion-limited SPL+
Dayton Audio PSS545HE-4 VORTEX28.8 -0.20.27 -0.03212.1 -12.58.6 -1.797.8 +0.1closeXmax 8.6 mm < 10.3 mm: lower excursion-limited SPL+
18 Sound 21NLW900029 =0.347 +0.04304 +79.410.7 +0.496.4 -1.3usable8 Ω vs 4 Ω: amp load changes · 1800 W vs 2500 W: lower power handling+
RCF 21LNW900029 =0.347 +0.04304 +79.410.7 +0.496.4 -1.3usable8 Ω vs 4 Ω: amp load changes · 1800 W vs 2500 W: lower power handling+
B&C 21 SW 15232 +30.297 -0.01198.2 -26.47.5 -2.898.9 +1.2usableXmax 7.5 mm < 10.3 mm: lower excursion-limited SPL+
B&C 21 SW 152 v201332 +30.297 -0.01200 -24.67.5 -2.899.5 +1.8usableXmax 7.5 mm < 10.3 mm: lower excursion-limited SPL+
Ciare NDC 21-532.2 +3.20.344 +0.04270.8 +46.28.8 -1.597.2 -0.5usable8 Ω vs 4 Ω: amp load changes · 1500 W vs 2500 W: lower power handling · Xmax 8.8 mm < 10.3 mm: lower excursion-limited SPL+
Beyma 21QLEX1600/Fe30 +10.281 -0.02309 +84.48.4 -1.998.1 +0.4usable8 Ω vs 4 Ω: amp load changes · 1600 W vs 2500 W: lower power handling · Xmax 8.4 mm < 10.3 mm: lower excursion-limited SPL+
B&C 21 SW 15029 =0.261 -0.04254 +29.47.5 -2.899.4 +1.7usable1500 W vs 2500 W: lower power handling · Xmax 7.5 mm < 10.3 mm: lower excursion-limited SPL+
RCF LF 21N55135 +60.331 +0.03200 -24.67.7 -2.697.7 =usable8 Ω vs 4 Ω: amp load changes · Xmax 7.7 mm < 10.3 mm: lower excursion-limited SPL+

Compare the closest 3 against the NSW6021-6 →

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.