Celestion FTX1225 v2024

12" · 8 Ω · 300 W · 96.8 dB · datasheet ↗

Thiele-Small parameters

Nominal size	12"
Impedance	8 Ω
Fs	47.3 Hz
Qts	0.396
Qes	0.437
Qms	4.214
Vas	84.6 L
Sd	530.9 cm²
Xmax	5.9 mm
Re	5.39 Ω
Bl	13.9 T·m
Mms	52.9 g
Pe	300 W
Sensitivity	96.8 dB

Alignment hint

EBP	108 · ported
Sealed Vb (Qtc ≈ 0.71)	≈ 38.7 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
Sica 12 PF 3	47 -0.3	0.39 -0.01	76.5 -8.1	5.5 -0.4	96.4 -0.4	close	Xmax 5.5 mm < 5.9 mm: lower excursion-limited SPL	+
Jensen SMOOTH BS 12N/250A	47 -0.3	0.425 +0.03	81.3 -3.3	5.5 -0.4	96.4 -0.4	close	Xmax 5.5 mm < 5.9 mm: lower excursion-limited SPL	+
Fane SOVEREIGN 12-300 v2024	47 -0.3	0.4 =	80 -4.6	5 -0.9	96.3 -0.5	close	Xmax 5 mm < 5.9 mm: lower excursion-limited SPL	+
Faital PRO 12FH530	45 -2.3	0.39 -0.01	75.6 -9	7.5 +1.6	97 +0.2	close	16 Ω vs 8 Ω: amp load changes	+
Faital PRO 12PR330	50 +2.7	0.4 =	79.1 -5.5	7.37 +1.47	98 +1.2	close		+
PHL Audio 4511	48 +0.7	0.406 +0.01	74.1 -10.5	5.4 -0.5	96.2 -0.6	close	Xmax 5.4 mm < 5.9 mm: lower excursion-limited SPL	+
Faital PRO 12FH500	48 +0.7	0.37 -0.03	77.4 -7.2	7.25 +1.35	96 -0.8	close	16 Ω vs 8 Ω: amp load changes	+
PHL Audio 4531 v2023	46 -1.3	0.399 =	71.9 -12.7	5.6 -0.3	95.9 -0.9	close	Xmax 5.6 mm < 5.9 mm: lower excursion-limited SPL	+
SICA 12 BP 2.5 CS	46.8 -0.5	0.425 +0.03	81.3 -3.3	5 -0.9	96.4 -0.4	close	200 W vs 300 W: lower power handling · Xmax 5 mm < 5.9 mm: lower excursion-limited SPL	+
SICA 12 BS 2.5 PL	46.8 -0.5	0.425 +0.03	81.3 -3.3	5 -0.9	96.4 -0.4	close	Xmax 5 mm < 5.9 mm: lower excursion-limited SPL	+

Compare the closest 3 against the FTX1225 v2024 →

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.