Radian 212/2 B-8

12" · 8 Ω · 250 W · 94.6 dB · datasheet ↗

Thiele-Small parameters

Nominal size	12"
Impedance	8 Ω
Fs	54.5 Hz
Qts	0.696
Qes	0.72
Qms	20.6
Vas	64.9 L
Sd	559 cm²
Xmax	0.9 mm
Re	6.4 Ω
Bl	13.2 T·m
Mms	57.6 g
Pe	250 W
Sensitivity	94.6 dB

Alignment hint

EBP	76 · flexible
Sealed Vb (Qtc ≈ 0.71)	≈ 2017.4 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
Eminence GAMMA 12	57 +2.5	0.676 -0.02	74.1 +9.2	1.6 +0.7	95.5 +0.9	close		+
Eminence GAMMA 12 A	57 +2.5	0.676 -0.02	74.1 +9.2	1.6 +0.7	95.5 +0.9	close		+
Siare 31TE vp	53.4 -1.1	0.746 +0.05	62 -2.9	4.1 +3.2	93.8 -0.8	close	120 W vs 250 W: lower power handling	+
Faital PRO 12PR310	55 +0.5	0.67 -0.03	65.1 +0.2	4.92 +4.02	98 +3.4	usable	16 Ω vs 8 Ω: amp load changes	+
Fane 12-100TC	56 +1.5	0.779 +0.08	56.1 -8.8	2.5 +1.6	93.5 -1.1	usable	100 W vs 250 W: lower power handling	+
SICA 12 D 1.5 CS 8 Ohms	62 +7.5	0.748 +0.05	63.5 -1.4	2.7 +1.8	96.8 +2.2	usable	100 W vs 250 W: lower power handling	+
Selenium 12PW3	50 -4.5	0.69 -0.01	97 +32.1	1.25 +0.35	93.9 -0.7	usable		+
Selenium 12PW3-SLF	50 -4.5	0.685 -0.01	97 +32.1	1.3 +0.4	95 +0.4	usable		+
Sica 12 D 1.5 CS	62 +7.5	0.75 +0.05	63.5 -1.4	2.7 +1.8	96.9 +2.3	usable	130 W vs 250 W: lower power handling	+
Technysound TS 30/300	48.6 -5.9	0.663 -0.03	65 +0.1	4 +3.1	92.1 -2.5	usable	150 W vs 250 W: lower power handling	+

Compare the closest 3 against the 212/2 B-8 →

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.