Beyma 21LEX1600/Nd

21.5" · 8 Ω · 1600 W · 99.3 dB · datasheet ↗

Thiele-Small parameters

Nominal size	21.5"
Impedance	8 Ω
Fs	30 Hz
Qts	0.272
Qes	0.29
Qms	4.4
Vas	394 L
Sd	1734 cm²
Xmax	9.3 mm
Re	5.4 Ω
Bl	32.5 T·m
Mms	301.1 g
Pe	1600 W
Sensitivity	99.3 dB

Alignment hint

EBP	103 · ported
Sealed Vb (Qtc ≈ 0.71)	≈ 68.4 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
RCF LF 21N451 v2017	30 =	0.259 -0.01	375 -19	8.6 -0.7	99.3 =	close	Xmax 8.6 mm < 9.3 mm: lower excursion-limited SPL	+
18 Sound 21LW400	28 -2	0.234 -0.04	385 -9	9.3 =	99.5 +0.2	close		+
RCF LF 21N451	30 =	0.239 -0.03	440 +46	8.9 -0.4	100.4 +1.1	close	Xmax 8.9 mm < 9.3 mm: lower excursion-limited SPL	+
Beyma 21PW1400FE	30 =	0.343 +0.07	401.5 +7.5	10 +0.7	98.6 -0.7	close		+
Beyma 21QLEX1600/Fe	30 =	0.281 +0.01	309 -85	8.4 -0.9	98.1 -1.2	close	Xmax 8.4 mm < 9.3 mm: lower excursion-limited SPL	+
PD PDN 2151	31.4 +1.4	0.276 =	303.4 -90.6	6.7 -2.6	99 -0.3	usable	1000 W vs 1600 W: lower power handling · Xmax 6.7 mm < 9.3 mm: lower excursion-limited SPL	+
Precision Devices PDN 2151	31.4 +1.4	0.276 =	303.4 -90.6	6.7 -2.6	99 -0.3	usable	1000 W vs 1600 W: lower power handling · Xmax 6.7 mm < 9.3 mm: lower excursion-limited SPL	+
MC Kenzie FRL-21/1200-LF	30 =	0.378 +0.11	374 -20	9.5 +0.2	98 -1.3	usable	1200 W vs 1600 W: lower power handling	+
RCF LF 21N401	30 =	0.378 +0.11	374 -20	10.6 +1.3	98 -1.3	usable		+
B&C 21 SW 150	29 -1	0.261 -0.01	254 -140	7.5 -1.8	99.4 +0.1	usable	4 Ω vs 8 Ω: amp load changes · Xmax 7.5 mm < 9.3 mm: lower excursion-limited SPL	+

Compare the closest 3 against the 21LEX1600/Nd →

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.