Supravox 285 GMF vp JTR 2

12" · 8 Ω · 70 W · 100.5 dB · datasheet ↗

Thiele-Small parameters

Nominal size	12"
Impedance	8 Ω
Fs	47.6 Hz
Qts	0.335
Qes	0.346
Qms	10.1
Vas	186 L
Sd	471 cm²
Xmax	4 mm
Re	6.5 Ω
Bl	10.2 T·m
Mms	18.7 g
Pe	70 W
Sensitivity	100.5 dB

Alignment hint

EBP	138 · ported
Sealed Vb (Qtc ≈ 0.71)	≈ 53.8 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 +0.4	0.315 -0.02	172 -14	4 =	100.5 =	close		+
Supravox 285 GMF vp JTR 1	47.8 +0.2	0.305 -0.03	191 +5	4 =	101.1 +0.6	close		+
Supravox 285 GMF vp1	47.2 -0.4	0.308 -0.03	174 -12	4 =	100.4 -0.1	close		+
Supravox 285 GMF v2019	47.8 +0.2	0.327 -0.01	157 -29	4 =	99.9 -0.6	close		+
Supravox 285 GMF vp4	50.1 +2.5	0.335 =	151 -35	3.9 -0.1	100.2 -0.3	close	Xmax 3.9 mm < 4 mm: lower excursion-limited SPL	+
Supravox 285 GMF v2013	48 +0.4	0.29 -0.05	175 -11	4 =	100.9 +0.4	close		+
Supravox 285 GMF vp3	50.4 +2.8	0.325 -0.01	154 -32	3.9 -0.1	100.5 =	close	Xmax 3.9 mm < 4 mm: lower excursion-limited SPL	+
Supravox 285 GMF vp8	52.2 +4.6	0.349 +0.01	152.5 -33.5	4 =	100.7 +0.2	close		+
Supravox 285 GMF vp wowo	50.2 +2.6	0.323 -0.01	143 -43	3.7 -0.3	100.2 -0.3	close	Xmax 3.7 mm < 4 mm: lower excursion-limited SPL	+
Supravox 285 GMF v2008	47 -0.6	0.372 +0.04	150 -36	4 =	98.9 -1.6	close		+

Compare the closest 3 against the 285 GMF vp JTR 2 →

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.