Helix P12

12" · 4 Ω · 350 W · 91.4 dB · datasheet ↗

Thiele-Small parameters

Nominal size	12"
Impedance	4 Ω
Fs	21.4 Hz
Qts	0.302
Qes	0.33
Qms	3.59
Vas	118.6 L
Sd	515.6 cm²
Xmax	9.9 mm
Re	3.2 Ω
Bl	15.1 T·m
Mms	173.8 g
Pe	350 W
Sensitivity	91.4 dB

Alignment hint

EBP	65 · flexible
Sealed Vb (Qtc ≈ 0.71)	≈ 26.5 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
Pioneer TS-W1201C	20 -1.4	0.291 -0.01	118 -0.6	9.2 -0.7	91.2 -0.2	close	Xmax 9.2 mm < 9.9 mm: lower excursion-limited SPL	+
Pioneer TS-W 304 C	21 -0.4	0.307 +0.01	136 +17.4	11 +1.1	92.2 +0.8	close		+
Helix W-12 COMPETITION	21.4 =	0.3 =	118.6 =	11 +1.1	87.3 -4.1	close		+
Eminence LAB 12 C	22.9 +1.5	0.33 +0.03	128.3 +9.7	11 +1.1	92.6 +1.2	close		+
Ground Zero GZHW 30X	22.6 +1.2	0.32 +0.02	101 -17.6	12.3 +2.4	90.6 -0.8	close		+
Pioneer TS-W304C	22.3 +0.9	0.274 -0.03	134 +15.4	9.8 -0.1	93.5 +2.1	close	Xmax 9.8 mm < 9.9 mm: lower excursion-limited SPL	+
Pioneer TSW 304 C	21 -0.4	0.342 +0.04	146 +27.4	11 +1.1	92 +0.6	close		+
GR Research SW-12-04	21 -0.4	0.279 -0.02	137 +18.4	8.3 -1.6	92.5 +1.1	close	200 W vs 350 W: lower power handling · Xmax 8.3 mm < 9.9 mm: lower excursion-limited SPL	+
Kenwood XR-W1204	21.5 +0.1	0.341 +0.04	125.386 +6.79	10.8 +0.9	87.3 -4.1	close		+
Eminence LAB 12C	23 +1.6	0.33 +0.03	128.31 +9.71	13 +3.1	88.9 -2.5	close		+

Compare the closest 3 against the P12 →

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.