EMS LB12 MKII vp JTR2

12" · 8 Ω · 40 W · 93.9 dB · datasheet ↗

Thiele-Small parameters

Nominal size	12"
Impedance	8 Ω
Fs	37.7 Hz
Qts	0.548
Qes	0.606
Qms	5.699
Vas	173.7 L
Sd	500 cm²
Xmax	3 mm
Re	7.85 Ω
Bl	10.5 T·m
Mms	36 g
Pe	40 W
Sensitivity	93.9 dB

Alignment hint

EBP	62 · flexible
Sealed Vb (Qtc ≈ 0.71)	≈ 261.2 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
EMS LB12 MKII vp JTR1	39 +1.3	0.543 -0.01	162 -11.7	3 =	94.1 +0.2	close		+
MCM Electronics 55-1255	35 -2.7	0.554 +0.01	197.6 +23.9	3.5 +0.5	93 -0.9	close		+
Davis 31TCA12 vp rc1 d	35 -2.7	0.53 -0.02	169.8 -3.9	6 +3	93.2 -0.7	close		+
Cabasse 30BZ24 vp oriu2	37 -0.7	0.543 -0.01	223 +49.3	4 +1	93.6 -0.3	close	16 Ω vs 8 Ω: amp load changes	+
Eminence LEGEND BP122 8 Ohms	35 -2.7	0.537 -0.01	157.4 -16.3	6.2 +3.2	94.2 +0.3	close		+
LaVoce LBASS12-15	38 +0.3	0.48 -0.07	160.93 -12.77	4.7 +1.7	95.5 +1.6	close		+
PHY-HP HB30LB15	36 -1.7	0.567 +0.02	224 +50.3	3 =	91.9 -2	close	16 Ω vs 8 Ω: amp load changes	+
PHY-HP HB30LB15SAG	36 -1.7	0.567 +0.02	224 +50.3	3 =	91.9 -2	close	16 Ω vs 8 Ω: amp load changes	+
PHY-HP KM30	36 -1.7	0.567 +0.02	224 +50.3	3 =	91.9 -2	close	16 Ω vs 8 Ω: amp load changes	+
PHY-HP KM30SAG	36 -1.7	0.567 +0.02	224 +50.3	3 =	91.9 -2	close	16 Ω vs 8 Ω: amp load changes	+

Compare the closest 3 against the LB12 MKII vp JTR2 →

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.