Celestion FTR12-3070C

12" · 8 Ω · 350 W · 98.5 dB · datasheet ↗

Thiele-Small parameters

Nominal size	12"
Impedance	8 Ω
Fs	66.1 Hz
Qts	0.332
Qes	0.375
Qms	2.9
Vas	39.6 L
Sd	530 cm²
Xmax	3 mm
Re	5.44 Ω
Bl	18.6 T·m
Mms	57.7 g
Pe	350 W
Sensitivity	98.5 dB

Alignment hint

EBP	176 · ported
Sealed Vb (Qtc ≈ 0.71)	≈ 11.2 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
JBL 2023H	67 +0.9	0.347 +0.01	48.8 +9.2	3.7 +0.7	99.8 +1.3	close		+
MC Kenzie MK C12-200BS vp1	72.1 +6	0.345 +0.01	38 -1.6	2.3 -0.7	98.5 =	close	200 W vs 350 W: lower power handling · Xmax 2.3 mm < 3 mm: lower excursion-limited SPL	+
RCF L 12P520	65 -1.1	0.355 +0.02	49 +9.4	3.4 +0.4	99.6 +1.1	close	250 W vs 350 W: lower power handling	+
Celestion TF 1225CX	63.5 -2.6	0.358 +0.03	45.1 +5.5	2.5 -0.5	98.1 -0.4	close	250 W vs 350 W: lower power handling · Xmax 2.5 mm < 3 mm: lower excursion-limited SPL	+
HH Electronics B12L	64 -2.1	0.382 +0.05	44.8 +5.2	3.4 +0.4	97.4 -1.1	close	200 W vs 350 W: lower power handling	+
RCF L 12P540	59 -7.1	0.349 +0.02	45 +5.4	4.3 +1.3	97.6 -0.9	close		+
RCF L12P520	65 -1.1	0.37 +0.04	47 +7.4	4 +1	97 -1.5	close	125 W vs 350 W: lower power handling	+
P.Audio P-12N	57 -9.1	0.319 -0.01	42.4 +2.8	2.5 -0.5	97.7 -0.8	close	Xmax 2.5 mm < 3 mm: lower excursion-limited SPL	+
18 Sound PWX12	61.3 -4.8	0.341 +0.01	56.2 +16.6	2.9 -0.1	98.6 +0.1	close	200 W vs 350 W: lower power handling · Xmax 2.9 mm < 3 mm: lower excursion-limited SPL	+
Celestion BN12-300S8	69.3 +3.2	0.392 +0.06	43.5 +3.9	2.5 -0.5	98.8 +0.3	usable	Xmax 2.5 mm < 3 mm: lower excursion-limited SPL	+

Compare the closest 3 against the FTR12-3070C →

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.