Audio Dynamique AD31TPA12G

12" · 8 Ω · 150 W · 97.5 dB · datasheet ↗

Thiele-Small parameters

Nominal size	12"
Impedance	8 Ω
Fs	37.2 Hz
Qts	0.448
Qes	0.49
Qms	5.2
Vas	213.6 L
Sd	543 cm²
Xmax	5 mm
Re	5.1 Ω
Bl	9.3 T·m
Mms	35.3 g
Pe	150 W
Sensitivity	97.5 dB

Alignment hint

EBP	76 · flexible
Sealed Vb (Qtc ≈ 0.71)	≈ 143.2 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
Davis 31TPA-12G	37 -0.2	0.448 =	213.5 -0.1	4.5 -0.5	97.4 -0.1	close	Xmax 4.5 mm < 5 mm: lower excursion-limited SPL	+
Davis 31TPG-A	37 -0.2	0.448 =	213 -0.6	4.5 -0.5	96.5 -1	close	Xmax 4.5 mm < 5 mm: lower excursion-limited SPL	+
Cabasse 30M20	34 -3.2	0.454 +0.01	220 +6.4	4.6 -0.4	96 -1.5	close	Xmax 4.6 mm < 5 mm: lower excursion-limited SPL	+
Davis 31TCA12 vp rc1 g	39 +1.8	0.477 +0.03	202.9 -10.7	6 +1	96.1 -1.4	close		+
Davis KIT ALBEDO	37.5 +0.3	0.459 +0.01	166 -47.6	5 =	96.5 -1	close		+
Philips AD12100/M8	36 -1.2	0.464 +0.02	193.3 -20.3	6.2 +1.2	94.6 -2.9	close	100 W vs 150 W: lower power handling	+
Tannoy DC 3134 CPA12	37.7 +0.5	0.369 -0.08	226.7 +13.1	5 =	96.1 -1.4	close	16 Ω vs 8 Ω: amp load changes · 75 W vs 150 W: lower power handling	+
Davis 31ST12 v2018	34.1 -3.1	0.428 -0.02	195.7 -17.9	5 =	93.9 -3.6	close	100 W vs 150 W: lower power handling	+
Sonido SCW-300	35 -2.2	0.401 -0.05	210 -3.6	4.5 -0.5	95 -2.5	close	50 W vs 150 W: lower power handling · Xmax 4.5 mm < 5 mm: lower excursion-limited SPL	+
Audax PR300T4 série vp	37 -0.2	0.519 +0.07	220 +6.4	4 -1	95.6 -1.9	usable	Xmax 4 mm < 5 mm: lower excursion-limited SPL	+

Compare the closest 3 against the AD31TPA12G →

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.