Beyma 21QLEX1600/Fe

21.5" · 8 Ω · 1600 W · 98.1 dB · datasheet ↗

Thiele-Small parameters

Nominal size	21.5"
Impedance	8 Ω
Fs	30 Hz
Qts	0.281
Qes	0.3
Qms	4.5
Vas	309 L
Sd	1734 cm²
Xmax	8.4 mm
Re	5.4 Ω
Bl	36.1 T·m
Mms	383.9 g
Pe	1600 W
Sensitivity	98.1 dB

Alignment hint

EBP	100 · flexible
Sealed Vb (Qtc ≈ 0.71)	≈ 57.9 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

Driver	Fs (Hz)	Qts	Vas (L)	Xmax (mm)	Sens (dB)	Fit	Notes	Compare
PD PDN 2151	31.4 +1.4	0.276 -0.01	303.4 -5.6	6.7 -1.7	99 +0.9	close	1000 W vs 1600 W: lower power handling · Xmax 6.7 mm < 8.4 mm: lower excursion-limited SPL	+
Precision Devices PDN 2151	31.4 +1.4	0.276 -0.01	303.4 -5.6	6.7 -1.7	99 +0.9	close	1000 W vs 1600 W: lower power handling · Xmax 6.7 mm < 8.4 mm: lower excursion-limited SPL	+
Beyma 21LEX1600/Nd	30 =	0.272 -0.01	394 +85	9.3 +0.9	99.3 +1.2	close		+
RCF LF 21N451 v2017	30 =	0.259 -0.02	375 +66	8.6 +0.2	99.3 +1.2	close		+
SB Audience NERO-21SW1100D	32 +2	0.339 +0.06	312.6 +3.6	8.1 -0.3	98.6 +0.5	close	1100 W vs 1600 W: lower power handling · Xmax 8.1 mm < 8.4 mm: lower excursion-limited SPL	+
Dayton Audio PSS545HE-4 VORTEX	28.8 -1.2	0.27 -0.01	212.1 -96.9	8.6 +0.2	97.8 -0.3	close	4 Ω vs 8 Ω: amp load changes	+
B&C 21 SW 150	29 -1	0.261 -0.02	254 -55	7.5 -0.9	99.4 +1.3	close	4 Ω vs 8 Ω: amp load changes · Xmax 7.5 mm < 8.4 mm: lower excursion-limited SPL	+
18 Sound 21NLW9000	29 -1	0.347 +0.07	304 -5	10.7 +2.3	96.4 -1.7	close		+
RCF 21LNW9000	29 -1	0.347 +0.07	304 -5	10.7 +2.3	96.4 -1.7	close		+
B&C 21 DS 115	30 =	0.234 -0.05	269 -40	7.6 -0.8	98.7 +0.6	usable	Xmax 7.6 mm < 8.4 mm: lower excursion-limited SPL	+

Compare the closest 3 against the 21QLEX1600/Fe →

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.