18 Sound 21NLW5300

21" · 8 Ω · 1800 W · 98.5 dB · datasheet ↗

Thiele-Small parameters

Nominal size	21"
Impedance	8 Ω
Fs	31 Hz
Qts	0.32
Qes	0.34
Qms	4.7
Vas	325 L
Sd	1662 cm²
Xmax	15.3 mm
Re	5.2 Ω
Bl	31 T·m
Mms	327 g
Pe	1800 W
Sensitivity	98.5 dB

Alignment hint

EBP	91 · flexible
Sealed Vb (Qtc ≈ 0.71)	≈ 83.7 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
18 Sound 21NTLW5000	30 -1	0.32 =	300 -25	17.5 +2.2	97 -1.5	close	4 Ω vs 8 Ω: amp load changes	+
Beyma 21"LEX1600/Nd	30 -1	0.29 -0.03	305 -20	14 -1.3	98 -0.5	close	Xmax 14 mm < 15.3 mm: lower excursion-limited SPL	+
18 Sound 21LW2600	27 -4	0.33 +0.01	333 +8	14.6 -0.7	97 -1.5	close	Xmax 14.6 mm < 15.3 mm: lower excursion-limited SPL	+
B&C 21SW115	30 -1	0.37 +0.05	318 -7	14 -1.3	97 -1.5	close	Xmax 14 mm < 15.3 mm: lower excursion-limited SPL	+
Beyma 21QLEX1600Fe	30 -1	0.28 -0.04	309 -16	13 -2.3	98 -0.5	close	Xmax 13 mm < 15.3 mm: lower excursion-limited SPL	+
18 Sound 21NLW9001	32 +1	0.31 -0.01	244 -81	14 -1.3	98 -0.5	close	Xmax 14 mm < 15.3 mm: lower excursion-limited SPL	+
18 Sound 21NTLW5000	31 =	0.36 +0.04	270 -55	17.5 +2.2	97 -1.5	close		+
18 Sound 21NLW9001	31 =	0.34 +0.02	272 -53	14 -1.3	95 -3.5	usable	4 Ω vs 8 Ω: amp load changes · Xmax 14 mm < 15.3 mm: lower excursion-limited SPL	+
Fane Colossus Prime 21XS	35 +4	0.339 +0.02	266 -59	14 -1.3	97.5 -1	usable	Xmax 14 mm < 15.3 mm: lower excursion-limited SPL	+
B&C 21SW115	33 +2	0.36 +0.04	278 -47	14 -1.3	97 -1.5	usable	4 Ω vs 8 Ω: amp load changes · Xmax 14 mm < 15.3 mm: lower excursion-limited SPL	+

Compare the closest 3 against the 21NLW5300 →

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.