Isophon 37/10 vp

12" · 4 Ω · 17 W · 101.1 dB · datasheet ↗

Thiele-Small parameters

Nominal size	12"
Impedance	4 Ω
Fs	47.1 Hz
Qts	0.542
Qes	0.568
Qms	11.82
Vas	142.5 L
Sd	572.6 cm²
Xmax	1.8 mm
Re	2.58 Ω
Bl	7 T·m
Mms	36.8 g
Pe	17 W
Sensitivity	101.1 dB

Alignment hint

EBP	83 · flexible
Sealed Vb (Qtc ≈ 0.71)	≈ 203 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
Eminence BETA 12LT	45 -2.1	0.507 -0.04	136.3 -6.2	3.2 +1.4	95.9 -5.2	usable	8 Ω vs 4 Ω: amp load changes	+
Eminence BETA-12LTA	45 -2.1	0.51 -0.03	136.3 -6.2	3.2 +1.4	95.4 -5.7	usable	8 Ω vs 4 Ω: amp load changes	+
Altec 920-8A	48 +0.9	0.501 -0.04	141.6 -0.9	1.3 -0.5	96.9 -4.2	usable	8 Ω vs 4 Ω: amp load changes · Xmax 1.3 mm < 1.8 mm: lower excursion-limited SPL	+
Supravox 285-2000EXC_07V	53 +5.9	0.485 -0.06	158 +15.5	4 +2.2	99.5 -1.6	usable	8 Ω vs 4 Ω: amp load changes	+
JBL 2125	45 -2.1	0.45 -0.09	135.9 -6.6	2.5 +0.7	97.2 -3.9	usable	8 Ω vs 4 Ω: amp load changes	+
JBL D123	45 -2.1	0.45 -0.09	135.9 -6.6	2.5 +0.7	97.2 -3.9	usable	8 Ω vs 4 Ω: amp load changes	+
Celestion AP12	39 -8.1	0.563 +0.02	159 +16.5	1.5 -0.3	98.6 -2.5	usable	Xmax 1.5 mm < 1.8 mm: lower excursion-limited SPL	+
Jensen BLUES 1200	46 -1.1	0.54 =	96.9 -45.6	3 +1.2	98.2 -2.9	usable		+
Eminence BETA 12CX	47 -0.1	0.48 -0.06	120.94 -21.56	3.5 +1.7	97.3 -3.8	usable	8 Ω vs 4 Ω: amp load changes	+
Eminence BETA 12CX v2019	47 -0.1	0.476 -0.07	120.9 -21.6	3.5 +1.7	97.5 -3.6	usable	8 Ω vs 4 Ω: amp load changes	+

Compare the closest 3 against the 37/10 vp →

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.