Supravox 285 GMF vp JTR 1

12" · 8 Ω · 70 W · 101.1 dB · datasheet ↗

Thiele-Small parameters

Nominal size	12"
Impedance	8 Ω
Fs	47.8 Hz
Qts	0.305
Qes	0.314
Qms	11.26
Vas	191 L
Sd	471 cm²
Xmax	4 mm
Re	6.5 Ω
Bl	10.6 T·m
Mms	18 g
Pe	70 W
Sensitivity	101.1 dB

Alignment hint

EBP	152 · ported
Sealed Vb (Qtc ≈ 0.71)	≈ 43.7 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 vp1	47.2 -0.6	0.308 =	174 -17	4 =	100.4 -0.7	close		+
Supravox 285 GMF v2013	48 +0.2	0.29 -0.02	175 -16	4 =	100.9 -0.2	close		+
Supravox 285 GMF vp2	48 +0.2	0.315 +0.01	172 -19	4 =	100.5 -0.6	close		+
Supravox 285 GMF vp JTR 2	47.6 -0.2	0.335 +0.03	186 -5	4 =	100.5 -0.6	close		+
Supravox 285 GMF v2019	47.8 =	0.327 +0.02	157 -34	4 =	99.9 -1.2	close		+
Supravox 285-2000EXC_09V	53 +5.2	0.309 =	156 -35	3.8 -0.2	101.5 +0.4	close	Xmax 3.8 mm < 4 mm: lower excursion-limited SPL	+
Supravox 285 GMF vp3	50.4 +2.6	0.325 +0.02	154 -37	3.9 -0.1	100.5 -0.6	close	Xmax 3.9 mm < 4 mm: lower excursion-limited SPL	+
Supravox 285 GMF vp4	50.1 +2.3	0.335 +0.03	151 -40	3.9 -0.1	100.2 -0.9	close	Xmax 3.9 mm < 4 mm: lower excursion-limited SPL	+
Fane STUDIO 12B	47 -0.8	0.274 -0.03	144 -47	5.1 +1.1	100.8 -0.3	usable		+
DAS Audio 12G	48 +0.2	0.267 -0.04	148 -43	6 +2	101 -0.1	usable		+

Compare the closest 3 against the 285 GMF vp JTR 1 →

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.