Isophon P30/37A vp

12" · 16 Ω · 25 W · 92.5 dB · datasheet ↗

Thiele-Small parameters

Nominal size	12"
Impedance	16 Ω
Fs	54.6 Hz
Qts	0.555
Qes	0.65
Qms	3.78
Vas	45 L
Sd	491 cm²
Xmax	1.4 mm
Re	8 Ω
Bl	16.4 T·m
Mms	63.9 g
Pe	25 W
Sensitivity	92.5 dB

Alignment hint

EBP	84 · flexible
Sealed Vb (Qtc ≈ 0.71)	≈ 72.2 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
Celestion TF1230	59 +4.4	0.515 -0.04	51.25 +6.25	4.8 +3.4	94 +1.5	usable	8 Ω vs 16 Ω: amp load changes	+
HH Electronics DC100LW	60 +5.4	0.56 +0.01	56.6 +11.6	3.2 +1.8	95.2 +2.7	usable	8 Ω vs 16 Ω: amp load changes	+
18 Sound 12NTLW3500	57 +2.4	0.54 -0.02	40 -5	7.9 +6.5	95 +2.5	usable		+
ERS HP30/150E-8	60.4 +5.8	0.715 +0.16	45.9 +0.9	2.8 +1.4	93.2 +0.7	usable	8 Ω vs 16 Ω: amp load changes	+
P.Audio E12-300S	62 +7.4	0.49 -0.07	49.05 +4.05	3.4 +2	95.3 +2.8	usable	8 Ω vs 16 Ω: amp load changes	+
ATC PA50-314 16 BASS	71 +16.4	0.459 -0.1	45 =	1.3 -0.1	94.6 +2.1	usable	Xmax 1.3 mm < 1.4 mm: lower excursion-limited SPL	+
RCF L12/565K	63 +8.4	0.56 +0.01	57 +12	4 +2.6	95.7 +3.2	usable	8 Ω vs 16 Ω: amp load changes	+
MCM Electronics 55-2992	53.6 -1	0.402 -0.15	44.4 -0.6	4.1 +2.7	94.5 +2	usable	8 Ω vs 16 Ω: amp load changes	+
P.Audio E12-200S	59.7 +5.1	0.475 -0.08	49.1 +4.1	3.5 +2.1	96.6 +4.1	usable	8 Ω vs 16 Ω: amp load changes	+
RCF L 12/565K	63 +8.4	0.56 +0.01	57 +12	2.9 +1.5	97.3 +4.8	usable	8 Ω vs 16 Ω: amp load changes	+

Compare the closest 3 against the P30/37A 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.