GRS 12PT-8

12" · 8 Ω · 350 W · 93 dB · datasheet ↗

Thiele-Small parameters

Nominal size	12"
Impedance	8 Ω
Fs	35 Hz
Qts	0.387
Qes	0.4
Qms	12.1
Vas	112 L
Sd	530.9 cm²
Xmax	7.8 mm
Re	7.6 Ω
Bl	17.5 T·m
Mms	72.9 g
Pe	350 W
Sensitivity	93 dB

Alignment hint

EBP	88 · flexible
Sealed Vb (Qtc ≈ 0.71)	≈ 47.9 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
McCauley 6232	35 =	0.411 +0.02	106.2 -5.8	8.4 +0.6	93.6 +0.6	close		+
MCM Electronics 55-2982	36.2 +1.2	0.407 +0.02	121.7 +9.7	7 -0.8	93.9 +0.9	close	Xmax 7 mm < 7.8 mm: lower excursion-limited SPL	+
Infinity KAPPA CS 120 BR	35.2 +0.2	0.397 +0.01	123.2 +11.2	8 +0.2	97.1 +4.1	close	4 Ω vs 8 Ω: amp load changes · 250 W vs 350 W: lower power handling	+
JBL GT2-12	29.5 -5.5	0.42 +0.03	114.9 +2.9	8 +0.2	94.1 +1.1	close	4 Ω vs 8 Ω: amp load changes · 220 W vs 350 W: lower power handling	+
Oxygen IN12 300	27 -8	0.362 -0.03	114.8 +2.8	8.7 +0.9	93.2 +0.2	close	4 Ω vs 8 Ω: amp load changes	+
Beyma SM212 vp Nº2	41.7 +6.7	0.41 +0.02	110.7 -1.3	7.3 -0.5	95.2 +2.2	close	Xmax 7.3 mm < 7.8 mm: lower excursion-limited SPL	+
Dayton Audio ST305-8	29.6 -5.4	0.348 -0.04	128.1 +16.1	8 +0.2	92.9 -0.1	close	275 W vs 350 W: lower power handling	+
Beyma SM112/N vp1	37 +2	0.433 +0.05	90 -22	7.3 -0.5	92.7 -0.3	usable	Xmax 7.3 mm < 7.8 mm: lower excursion-limited SPL	+
JBL P1200	30 -5	0.45 +0.06	123 +11	7.8 =	92.8 -0.2	usable	250 W vs 350 W: lower power handling	+
hertz Hertz Audio ES300	28 -7	0.382 -0.01	89.4 -22.6	7.7 -0.1	93 =	usable	4 Ω vs 8 Ω: amp load changes · Xmax 7.7 mm < 7.8 mm: lower excursion-limited SPL	+

Compare the closest 3 against the 12PT-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.