Davis 31TPA-12G

12" · 8 Ω · 150 W · 97.4 dB · datasheet ↗

Thiele-Small parameters

Nominal size	12"
Impedance	8 Ω
Fs	37 Hz
Qts	0.448
Qes	0.49
Qms	5.2
Vas	213.5 L
Sd	531 cm²
Xmax	4.5 mm
Re	5.1 Ω
Bl	9.1 T·m
Mms	34.3 g
Pe	150 W
Sensitivity	97.4 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
Audio Dynamique AD31TPA12G	37.2 +0.2	0.448 =	213.6 +0.1	5 +0.5	97.5 +0.1	close		+
Davis 31TPG-A	37 =	0.448 =	213 -0.5	4.5 =	96.5 -0.9	close		+
Cabasse 30M20	34 -3	0.454 +0.01	220 +6.5	4.6 +0.1	96 -1.4	close		+
Davis 31TCA12 vp rc1 g	39 +2	0.477 +0.03	202.9 -10.6	6 +1.5	96.1 -1.3	close		+
Davis KIT ALBEDO	37.5 +0.5	0.459 +0.01	166 -47.5	5 +0.5	96.5 -0.9	close		+
Sonido SCW-300	35 -2	0.401 -0.05	210 -3.5	4.5 =	95 -2.4	close	50 W vs 150 W: lower power handling	+
Philips AD12100/M8	36 -1	0.464 +0.02	193.3 -20.2	6.2 +1.7	94.6 -2.8	close	100 W vs 150 W: lower power handling	+
Audax PR300T4 série vp	37 =	0.519 +0.07	220 +6.5	4 -0.5	95.6 -1.8	close	Xmax 4 mm < 4.5 mm: lower excursion-limited SPL	+
Beyma HP12	36 -1	0.401 -0.05	200 -13.5	4 -0.5	95.6 -1.8	close	Xmax 4 mm < 4.5 mm: lower excursion-limited SPL	+
Tannoy DC 3134 CPA12	37.7 +0.7	0.369 -0.08	226.7 +13.2	5 +0.5	96.1 -1.3	close	16 Ω vs 8 Ω: amp load changes · 75 W vs 150 W: lower power handling	+

Compare the closest 3 against the 31TPA-12G →

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.