JBL 2123H

10" · 6 Ω · 125 W · 97.4 dB · datasheet ↗

Thiele-Small parameters

Nominal size	10"
Impedance	6 Ω
Fs	75 Hz
Qts	0.27
Qes	0.29
Qms	4
Vas	25 L
Sd	314 cm²
Xmax	2.5 mm
Re	4.18 Ω
Bl	13 T·m
Mms	24.86 g
Pe	125 W
Sensitivity	97.4 dB

Alignment hint

EBP	259 · ported
Sealed Vb (Qtc ≈ 0.71)	≈ 4.3 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
Oberton 10M250	76.65 +1.65	0.28 +0.01	23.05 -1.95	2.75 +0.25	97 -0.4	close	8 Ω vs 6 Ω: amp load changes	+
B&C 10 MBX 64	65 -10	0.262 -0.01	26 +1	3.7 +1.2	97.8 +0.4	close	8 Ω vs 6 Ω: amp load changes	+
RCF L10/750YK	68 -7	0.24 -0.03	26 +1	2.5 =	97 -0.4	close		+
Altec ER-10	75 =	0.289 +0.02	29.9 +4.9	2.5 =	98.8 +1.4	close	8 Ω vs 6 Ω: amp load changes	+
LaVoce WAF102.50A	71 -4	0.311 +0.04	23.6 -1.4	3.2 +0.7	97.7 +0.3	close	8 Ω vs 6 Ω: amp load changes	+
RCF 10 CX251	72 -3	0.237 -0.03	25 =	3 +0.5	99.6 +2.2	close	8 Ω vs 6 Ω: amp load changes	+
RCF CX 10 N 251	72 -3	0.237 -0.03	25 =	3 +0.5	99.6 +2.2	close	8 Ω vs 6 Ω: amp load changes	+
RCF CX 10N251	72 -3	0.237 -0.03	25 =	3 +0.5	99.6 +2.2	close	8 Ω vs 6 Ω: amp load changes	+
RCF CX 10N251 v2015	72 -3	0.237 -0.03	25 =	3 +0.5	99.6 +2.2	close	8 Ω vs 6 Ω: amp load changes	+
P.Audio P10/100MB	73 -2	0.234 -0.04	26.7 +1.7	2.5 =	99.1 +1.7	close	8 Ω vs 6 Ω: amp load changes	+

Compare the closest 3 against the 2123H →

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.