JBL 2123J

10" · 16 Ω · 250 W · 96.8 dB

Thiele-Small parameters

Nominal size	10"
Impedance	16 Ω
Fs	85 Hz
Qts	0.322
Qes	0.37
Qms	2.5
Vas	19.8 L
Sd	316.1 cm²
Xmax	2.5 mm
Re	8.7 Ω
Bl	17.6 T·m
Mms	24.8 g
Pe	250 W
Sensitivity	96.8 dB

Alignment hint

EBP	230 · ported
Sealed Vb (Qtc ≈ 0.71)	≈ 5.2 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
JBL 2123H	85 =	0.322 =	19.8 =	2.5 =	100 +3.2	close	8 Ω vs 16 Ω: amp load changes	+
Celestion BN10-200S8	89.4 +4.4	0.352 +0.03	20.5 +0.7	2.5 =	99.5 +2.7	close	8 Ω vs 16 Ω: amp load changes	+
RCF MR 10H300	90 +5	0.312 -0.01	16.5 -3.3	2.7 +0.2	98.9 +2.1	close	8 Ω vs 16 Ω: amp load changes	+
LaVoce WAN102.50	78 -7	0.35 +0.03	22.4 +2.6	5.1 +2.6	97 +0.2	close	8 Ω vs 16 Ω: amp load changes	+
Oberton 10M250	76.65 -8.35	0.28 -0.04	23.05 +3.25	2.75 +0.25	97 +0.2	usable	8 Ω vs 16 Ω: amp load changes	+
B&C 10 NDL 64 vp	71 -14	0.361 +0.04	19 -0.8	3.1 +0.6	95.9 -0.9	usable	8 Ω vs 16 Ω: amp load changes	+
LaVoce WSN102.50	76 -9	0.39 +0.07	20.71 +0.91	2.9 +0.4	97.5 +0.7	usable	8 Ω vs 16 Ω: amp load changes	+
18 Sound 10NMB420 vp CF1	84.8 -0.2	0.318 =	26 +6.2	3.3 +0.8	100.2 +3.4	usable	8 Ω vs 16 Ω: amp load changes	+
B&C 10 CXN 64	68 -17	0.312 -0.01	23 +3.2	3.5 +1	96.9 +0.1	usable	8 Ω vs 16 Ω: amp load changes	+
SB Audience NERO-10MWN600D	68 -17	0.339 +0.02	18.8 -1	3.9 +1.4	95.8 -1	usable	8 Ω vs 16 Ω: amp load changes	+

Compare the closest 3 against the 2123J →

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.