Audax 21PA12 RV

10" · 4 Ω · 10 W · 92.5 dB

Thiele-Small parameters

Nominal size	10"
Impedance	4 Ω
Fs	57.2 Hz
Qts	1.462
Qes	2.079
Qms	4.926
Vas	57.6 L
Sd	283 cm²
Xmax	1 mm
Re	3.65 Ω
Bl	3.1 T·m
Mms	15.1 g
Pe	10 W
Sensitivity	92.5 dB

Alignment hint

EBP	28 · 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
Jinwey YDA-250-4	58.3 +1.1	1.291 -0.17	36.6 -21	2 +1	92.2 -0.3	usable		+
Visaton W250 vp	55.6 -1.6	1.045 -0.42	58.1 +0.5	3.4 +2.4	91.9 -0.6	usable	8 Ω vs 4 Ω: amp load changes	+
SICA 10 D 1 CS	76.1 +18.9	1.564 +0.1	43.9 -13.7	1.5 +0.5	93.2 +0.7	usable	8 Ω vs 4 Ω: amp load changes	+
Jinwey YDA-250-8	60.1 +2.9	1.473 +0.01	35.8 -21.8	1.9 +0.9	89 -3.5	usable	8 Ω vs 4 Ω: amp load changes	+
Beyma HP10	61 +3.8	1.057 -0.4	51 -6.6	3.1 +2.1	92.1 -0.4	usable	8 Ω vs 4 Ω: amp load changes	+
Ciare CH250	65 +7.8	1.367 -0.09	52 -5.6	0.5 -0.5	95.4 +2.9	usable	Xmax 0.5 mm < 1 mm: lower excursion-limited SPL	+
Skytronic SP 1000	52 -5.2	1.064 -0.4	51.6 -6	6 +5	90.6 -1.9	usable	8 Ω vs 4 Ω: amp load changes	+
SICA LP 266.25 / 280 ER 4	75 +17.8	1.311 -0.15	40.6 -17	1.5 +0.5	96.9 +4.4	usable		+
Fenton PS10 vp2	59.9 +2.7	1.01 -0.45	41.2 -16.4	3.2 +2.2	90.4 -2.1	usable	16 Ω vs 4 Ω: amp load changes	+
Davis 28MP10	40 -17.2	1.42 -0.04	80.1 +22.5	3 +2	87.8 -4.7	usable	8 Ω vs 4 Ω: amp load changes	+

Compare the closest 3 against the 21PA12 RV →

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.