18 Sound 12CX800

12" · 8 Ω · 400 W · 99.4 dB · datasheet ↗

Thiele-Small parameters

Nominal size	12"
Impedance	8 Ω
Fs	53 Hz
Qts	0.253
Qes	0.27
Qms	4
Vas	73 L
Sd	530 cm²
Xmax	4.7 mm
Re	5.8 Ω
Bl	18.7 T·m
Mms	48.6 g
Pe	400 W
Sensitivity	99.4 dB

Alignment hint

EBP	196 · ported
Sealed Vb (Qtc ≈ 0.71)	≈ 10.7 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 MB 12G301	53 =	0.264 +0.01	72 -1	4.8 +0.1	99.5 +0.1	close		+
RCF MB 12N301	54 +1	0.24 -0.01	71 -2	4.9 +0.2	99.7 +0.3	close		+
Oberton 12B400	50.47 -2.53	0.249 =	74.74 +1.74	5.25 +0.55	98 -1.4	close		+
B&C 12PLB76	50 -3	0.23 -0.02	75 +2	5 +0.3	99 -0.4	close		+
18 Sound 12ND830	55 +2	0.28 +0.03	72 -1	6.5 +1.8	99 -0.4	close		+
Monacor SP-12/300NEO	53 =	0.252 =	68 -5	3.5 -1.2	99.5 +0.1	close	300 W vs 400 W: lower power handling · Xmax 3.5 mm < 4.7 mm: lower excursion-limited SPL	+
Monacor SP-12A/300NEO	53 =	0.252 =	68 -5	3.5 -1.2	99.5 +0.1	close	300 W vs 400 W: lower power handling · Xmax 3.5 mm < 4.7 mm: lower excursion-limited SPL	+
B&C 12 PLB 76	50 -3	0.229 -0.02	75 +2	4.4 -0.3	99.7 +0.3	close	Xmax 4.4 mm < 4.7 mm: lower excursion-limited SPL	+
Electro-Voice EVM-DL12X	56 +3	0.24 -0.01	77.3 +4.3	4.1 -0.6	99.2 -0.2	close	150 W vs 400 W: lower power handling · Xmax 4.1 mm < 4.7 mm: lower excursion-limited SPL	+
B&C 12NDL76	50 -3	0.27 +0.02	69 -4	7 +2.3	100 +0.6	close	16 Ω vs 8 Ω: amp load changes	+

Compare the closest 3 against the 12CX800 →

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.