Supravox 285 GMF vp1

12" · 8 Ω · 70 W · 100.4 dB · datasheet ↗

Thiele-Small parameters

Nominal size	12"
Impedance	8 Ω
Fs	47.2 Hz
Qts	0.308
Qes	0.32
Qms	8.24
Vas	174 L
Sd	471 cm²
Xmax	4 mm
Re	6.5 Ω
Bl	11.1 T·m
Mms	20.3 g
Pe	70 W
Sensitivity	100.4 dB

Alignment hint

EBP	148 · ported
Sealed Vb (Qtc ≈ 0.71)	≈ 40.7 L

EBP > 100: favours a ported (bass-reflex) 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
Supravox 285 GMF vp2	48 +0.8	0.315 +0.01	172 -2	4 =	100.5 +0.1	close		+
Supravox 285 GMF v2013	48 +0.8	0.29 -0.02	175 +1	4 =	100.9 +0.5	close		+
Supravox 285 GMF vp JTR 1	47.8 +0.6	0.305 =	191 +17	4 =	101.1 +0.7	close		+
Supravox 285 GMF vp JTR 2	47.6 +0.4	0.335 +0.03	186 +12	4 =	100.5 +0.1	close		+
Supravox 285 GMF v2019	47.8 +0.6	0.327 +0.02	157 -17	4 =	99.9 -0.5	close		+
Supravox 285 GMF vp3	50.4 +3.2	0.325 +0.02	154 -20	3.9 -0.1	100.5 +0.1	close	Xmax 3.9 mm < 4 mm: lower excursion-limited SPL	+
Supravox 285-2000EXC_09V	53 +5.8	0.309 =	156 -18	3.8 -0.2	101.5 +1.1	close	Xmax 3.8 mm < 4 mm: lower excursion-limited SPL	+
Supravox 285 GMF vp4	50.1 +2.9	0.335 +0.03	151 -23	3.9 -0.1	100.2 -0.2	close	Xmax 3.9 mm < 4 mm: lower excursion-limited SPL	+
Supravox 285 GMF vp wowo	50.2 +3	0.323 +0.02	143 -31	3.7 -0.3	100.2 -0.2	close	Xmax 3.7 mm < 4 mm: lower excursion-limited SPL	+
Fane STUDIO 12B	47 -0.2	0.274 -0.03	144 -30	5.1 +1.1	100.8 +0.4	close		+

Compare the closest 3 against the 285 GMF vp1 →

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.