Great Plains Audio 212-8A GPA

12" · 8 Ω · 300 W · 98.1 dB · datasheet ↗

Thiele-Small parameters

Nominal size	12"
Impedance	8 Ω
Fs	51.2 Hz
Qts	0.459
Qes	0.48
Qms	10.57
Vas	106.4 L
Sd	527.1 cm²
Xmax	3 mm
Re	5.83 Ω
Bl	11.8 T·m
Mms	35.4 g
Pe	300 W
Sensitivity	98.1 dB

Alignment hint

EBP	107 · ported
Sealed Vb (Qtc ≈ 0.71)	≈ 77.5 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
Davis 31TCA12 vp	49.1 -2.1	0.459 =	107.8 +1.4	5.5 +2.5	96.9 -1.2	close	200 W vs 300 W: lower power handling	+
B&C 12 HPL 51	51 -0.2	0.479 +0.02	96 -10.4	4 +1	97.3 -0.8	close	150 W vs 300 W: lower power handling	+
Eminence BETA-12A	47 -4.2	0.46 =	120.1 +13.7	4.4 +1.4	98 -0.1	close		+
Eminence BETA 12A	47 -4.2	0.462 =	120 +13.6	4.4 +1.4	98 -0.1	close		+
Eminence BETA 12A2	47 -4.2	0.462 =	120.1 +13.7	4.4 +1.4	98 -0.1	close		+
Davis 31TCA12 vp3	49.1 -2.1	0.452 -0.01	115.6 +9.2	5.6 +2.6	97.3 -0.8	close	200 W vs 300 W: lower power handling	+
Beyma 12BR70 vp	49.1 -2.1	0.461 =	95.8 -10.6	4 +1	96.3 -1.8	close	125 W vs 300 W: lower power handling	+
Eminence BETA 12CX v2019	47 -4.2	0.476 +0.02	120.9 +14.5	3.5 +0.5	97.5 -0.6	close		+
Monacor SP-12 vp nº1	45.8 -5.4	0.458 =	104.3 -2.1	3.9 +0.9	95.6 -2.5	close	100 W vs 300 W: lower power handling	+
Eminence BETA 12CX	47 -4.2	0.48 +0.02	120.94 +14.54	3.5 +0.5	97.3 -0.8	close		+

Compare the closest 3 against the 212-8A GPA →

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.