Audax PR300T2

12" · 4 Ω · 100 W · 99.4 dB

Thiele-Small parameters

Nominal size	12"
Impedance	4 Ω
Fs	51 Hz
Qts	0.497
Qes	0.57
Qms	3.89
Vas	97 L
Sd	540 cm²
Xmax	2 mm
Re	3.3 Ω
Bl	8.7 T·m
Mms	41 g
Pe	100 W
Sensitivity	99.4 dB

Alignment hint

EBP	89 · flexible
Sealed Vb (Qtc ≈ 0.71)	≈ 94.7 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
B&C 12 HPL 51	51 =	0.479 -0.02	96 -1	4 +2	97.3 -2.1	close	8 Ω vs 4 Ω: amp load changes	+
Philips AD12100 vp N°2	54.2 +3.2	0.505 +0.01	84.4 -12.6	3 +1	98.8 -0.6	close		+
Great Plains Audio 212-8A GPA	51.2 +0.2	0.459 -0.04	106.4 +9.4	3 +1	98.1 -1.3	close	8 Ω vs 4 Ω: amp load changes	+
Samy Speaker CX-12AW200G	55 +4	0.438 -0.06	95.6 -1.4	2.5 +0.5	98.9 -0.5	close	8 Ω vs 4 Ω: amp load changes	+
Jensen BLUES 1200	46 -5	0.54 +0.04	96.9 -0.1	3 +1	98.2 -1.2	close		+
Faital PRO 12PR300	50 -1	0.49 -0.01	89.7 -7.3	4.92 +2.92	97 -2.4	close	16 Ω vs 4 Ω: amp load changes	+
Eminence DELTA 12B	58 +7	0.48 -0.02	87 -10	2.7 +0.7	98.3 -1.1	close	16 Ω vs 4 Ω: amp load changes	+
University Sound 312 200	50.5 -0.5	0.503 +0.01	85 -12	2 =	94.4 -5	close	8 Ω vs 4 Ω: amp load changes · 35 W vs 100 W: lower power handling	+
Philips AD12100 vp N°1	55.7 +4.7	0.475 -0.02	80.1 -16.9	3 +1	99.3 -0.1	close		+
Beyma 12BR70 vp	49.1 -1.9	0.461 -0.04	95.8 -1.2	4 +2	96.3 -3.1	close	8 Ω vs 4 Ω: amp load changes	+

Compare the closest 3 against the PR300T2 →

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.