Sphynx SP-W12-BP ferrite

12" · 8 Ω · 100 W · 91.7 dB · datasheet ↗

Thiele-Small parameters

Nominal size	12"
Impedance	8 Ω
Fs	34.3 Hz
Qts	1.063
Qes	1.48
Qms	3.77
Vas	337 L
Sd	572.6 cm²
Xmax	6 mm
Re	7.9 Ω
Bl	5.8 T·m
Mms	29.4 g
Pe	100 W
Sensitivity	91.7 dB

Alignment hint

EBP	23 · 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
Sphynx SP-W12-BP v2015	34.3 =	1.063 =	337 =	6 =	91.7 =	close		+
Sphynx SP-W12 IND	30.4 -3.9	0.868 -0.19	336.9 -0.1	4 -2	91.3 -0.4	usable	Xmax 4 mm < 6 mm: lower excursion-limited SPL	+
Sphynx SP-W12-BP	30.4 -3.9	0.864 -0.2	336.9 -0.1	4 -2	91.3 -0.4	usable	Xmax 4 mm < 6 mm: lower excursion-limited SPL	+
Kenwood RD 30 FU 120-F	31.6 -2.7	0.879 -0.18	206.3 -130.7	8 +2	89.8 -1.9	usable		+
Philips AD12672/W8	29 -5.3	0.662 -0.4	245 -92	6 =	92.3 +0.6	usable		+
Jamo 20325	32 -2.3	0.849 -0.21	163.4 -173.6	5 -1	93 +1.3	usable	4 Ω vs 8 Ω: amp load changes · Xmax 5 mm < 6 mm: lower excursion-limited SPL	+
Lautsprecher Technik MHB-12	38.2 +3.9	1.107 +0.04	132.7 -204.3	5 -1	88.9 -2.8	risky	Xmax 5 mm < 6 mm: lower excursion-limited SPL	+
AE Speakers DIPOLE 12-D4	25.9 -8.4	0.685 -0.38	273 -64	10 +4	94.2 +2.5	risky	4 Ω vs 8 Ω: amp load changes	+
Goldwood GW‐212/4	35.8 +1.5	1.204 +0.14	166.6 -170.4	3.5 -2.5	88.9 -2.8	risky	4 Ω vs 8 Ω: amp load changes · Xmax 3.5 mm < 6 mm: lower excursion-limited SPL	+
Sphynx SP-W12-PRO-2	33 -1.3	0.574 -0.49	284 -53	4.3 -1.7	94.5 +2.8	risky	Xmax 4.3 mm < 6 mm: lower excursion-limited SPL	+

Compare the closest 3 against the SP-W12-BP ferrite →

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.