MTX Audio RTL12-44 DVC

12" · 4 Ω · 250 W · 91.7 dB · datasheet ↗

Thiele-Small parameters

Nominal size	12"
Impedance	4 Ω
Fs	30.4 Hz
Qts	0.761
Qes	0.876
Qms	5.804
Vas	74 L
Sd	530.9 cm²
Xmax	7.1 mm
Re	2.03 Ω
Bl	8 T·m
Mms	146.3 g
Pe	250 W
Sensitivity	91.7 dB

Alignment hint

EBP	35 · sealed
Sealed Vb (Qtc ≈ 0.71)	Qts too high

EBP < 50: favours a sealed (closed) 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
MTX Audio RT12-44	28 -2.4	0.698 -0.06	68 -6	7.6 +0.5	91.8 +0.1	close	2 Ω vs 4 Ω: amp load changes	+
MTX Audio TH6000 6124	29.7 -0.7	0.66 -0.1	78.4 +4.4	7.4 +0.3	90.3 -1.4	close		+
Pioneer TS-W300R	29.5 -0.9	0.646 -0.11	93.2 +19.2	6.8 -0.3	91.6 -0.1	usable	150 W vs 250 W: lower power handling · Xmax 6.8 mm < 7.1 mm: lower excursion-limited SPL	+
JL Audio 12W0V3-4	28.4 -2	0.67 -0.09	71.6 -2.4	9.3 +2.2	88.3 -3.4	usable	8 Ω vs 4 Ω: amp load changes	+
Oxygen SPIRAL 12.1	27 -3.4	0.749 -0.01	94 +20	7 -0.1	88.7 -3	usable	150 W vs 250 W: lower power handling · Xmax 7 mm < 7.1 mm: lower excursion-limited SPL	+
Oxygen SPIRAL 300	32 +1.6	0.56 -0.2	81 +7	7.6 +0.5	92 +0.3	usable		+
Pioneer TS-W304R	28.6 -1.8	0.701 -0.06	77.9 +3.9	4.7 -2.4	90.2 -1.5	usable	Xmax 4.7 mm < 7.1 mm: lower excursion-limited SPL	+
Alpine SWE-1241	31 +0.6	0.653 -0.11	61 -13	11.3 +4.2	89.6 -2.1	usable		+
MTX Audio T5512-04	29.3 -1.1	0.583 -0.18	66.9 -7.1	7.3 +0.2	89.8 -1.9	usable		+
Pioneer TS-300S4	27 -3.4	0.7 -0.06	77.88 +3.88	5 -2.1	93 +1.3	usable	Xmax 5 mm < 7.1 mm: lower excursion-limited SPL	+

Compare the closest 3 against the RTL12-44 DVC →

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.