18 Sound 12ND830

12" · 4 Ω · 450 W · 99 dB · datasheet ↗

Thiele-Small parameters

Nominal size	12"
Impedance	4 Ω
Fs	58 Hz
Qts	0.24
Qes	0.25
Qms	6.48
Vas	63 L
Sd	531 cm²
Xmax	6.5 mm
Re	2.8 Ω
Bl	13.7 T·m
Mms	47 g
Pe	450 W
Sensitivity	99 dB

Alignment hint

EBP	232 · ported
Sealed Vb (Qtc ≈ 0.71)	≈ 8.2 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
Beyma 12MC700Nd	51 -7	0.24 =	58 -5	7 +0.5	99 =	close	8 Ω vs 4 Ω: amp load changes	+
Precision Devices PD123 ER	60.5 +2.5	0.247 +0.01	51 -12	6.5 =	97 -2	close	16 Ω vs 4 Ω: amp load changes	+
18 Sound 12ND830	55 -3	0.28 +0.04	72 +9	6.5 =	99 =	close	8 Ω vs 4 Ω: amp load changes	+
RCF LF12P903	47 -11	0.23 -0.01	65 +2	7 +0.5	97.8 -1.2	close	8 Ω vs 4 Ω: amp load changes	+
18 Sound 12W750	55 -3	0.27 +0.03	58 -5	7 +0.5	97 -2	close		+
RCF MB 12N301	54 -4	0.24 =	71 +8	4.9 -1.6	99.7 +0.7	close	8 Ω vs 4 Ω: amp load changes · Xmax 4.9 mm < 6.5 mm: lower excursion-limited SPL	+
Beyma 12MCB700	51 -7	0.27 +0.03	59.5 -3.5	7 +0.5	98 -1	close	8 Ω vs 4 Ω: amp load changes	+
Oberton 12B450	46.29 -11.71	0.235 -0.01	71.75 +8.75	7.75 +1.25	99 =	close	8 Ω vs 4 Ω: amp load changes	+
B&C 12NDL88	48 -10	0.24 =	57 -6	8 +1.5	97 -2	close		+
Beyma 12"P80/Fe V2	48 -10	0.21 -0.03	61 -2	7.5 +1	99 =	close	8 Ω vs 4 Ω: amp load changes	+

Compare the closest 3 against the 12ND830 →

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.