Eminence ALPHA-12A

12" · 8 Ω · 150 W · 95.6 dB · datasheet ↗

Thiele-Small parameters

Nominal size	12"
Impedance	8 Ω
Fs	49 Hz
Qts	0.77
Qes	0.88
Qms	6.53
Vas	121.5 L
Sd	519.5 cm²
Xmax	2.4 mm
Re	6.3 Ω
Bl	8.5 T·m
Mms	33 g
Pe	150 W
Sensitivity	95.6 dB

Alignment hint

EBP	56 · flexible
Sealed Vb (Qtc ≈ 0.71)	Qts too high

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
Eminence ALPHA 12	49 =	0.775 +0.01	121.5 =	2.4 =	95.1 -0.5	close		+
Eminence ALPHA 12 A	49 =	0.775 +0.01	121.5 =	2.4 =	95.1 -0.5	close		+
Eminence ALPHA 12A	49 =	0.77 =	121.5 =	2.4 =	93.9 -1.7	close	75 W vs 150 W: lower power handling	+
Audax PR300T0	48 -1	0.824 +0.05	142 +20.5	3.5 +1.1	95.4 -0.2	close	100 W vs 150 W: lower power handling	+
Fane SOVEREIGN 12-125	47 -2	0.796 +0.03	113.2 -8.3	4.9 +2.5	93.8 -1.8	close		+
Monacor SP-302E	39 -10	0.722 -0.05	141 +19.5	4 +1.6	95.3 -0.3	usable	4 Ω vs 8 Ω: amp load changes · 100 W vs 150 W: lower power handling	+
AE Speakers LO12-D16	41.9 -7.1	0.67 -0.1	119.7 -1.8	7.4 +5	94.1 -1.5	usable		+
Visaton WS32AW vp de FREDO51	39 -10	0.765 -0.01	115 -6.5	5 +2.6	91.5 -4.1	usable		+
Fostex PS 300	58 +9	0.857 +0.09	102.2 -19.3	1.9 -0.5	95.8 +0.2	usable	75 W vs 150 W: lower power handling · Xmax 1.9 mm < 2.4 mm: lower excursion-limited SPL	+
AE Speakers LO12-D8 v2016	41.9 -7.1	0.67 -0.1	117.9 -3.6	7.4 +5	97.1 +1.5	usable	4 Ω vs 8 Ω: amp load changes	+

Compare the closest 3 against the ALPHA-12A →

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.