Jensen SMOOTH BS 12N/250A

12" · 8 Ω · 250 W · 96.4 dB · datasheet ↗

Thiele-Small parameters

Nominal size	12"
Impedance	8 Ω
Fs	47 Hz
Qts	0.425
Qes	0.44
Qms	12.58
Vas	81.3 L
Sd	530.9 cm²
Xmax	5.5 mm
Re	5.5 Ω
Bl	14.3 T·m
Mms	55.7 g
Pe	250 W
Sensitivity	96.4 dB

Alignment hint

EBP	107 · ported
Sealed Vb (Qtc ≈ 0.71)	≈ 46 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 BP 2.5 CS	46.8 -0.2	0.425 =	81.3 =	5 -0.5	96.4 =	close	Xmax 5 mm < 5.5 mm: lower excursion-limited SPL	+
SICA 12 BS 2.5 PL	46.8 -0.2	0.425 =	81.3 =	5 -0.5	96.4 =	close	Xmax 5 mm < 5.5 mm: lower excursion-limited SPL	+
SICA PL 12 B 2.5 S	46.8 -0.2	0.425 =	81.3 =	5 -0.5	96.4 =	close	Xmax 5 mm < 5.5 mm: lower excursion-limited SPL	+
Faital PRO 12FE300	47 =	0.44 +0.02	81.4 +0.1	5.47 -0.03	95 -1.4	close	4 Ω vs 8 Ω: amp load changes · Xmax 5.47 mm < 5.5 mm: lower excursion-limited SPL	+
Fane SOVEREIGN 12-300 v2024	47 =	0.4 -0.02	80 -1.3	5 -0.5	96.3 -0.1	close	Xmax 5 mm < 5.5 mm: lower excursion-limited SPL	+
Sica 12 PF 3	47 =	0.39 -0.03	76.5 -4.8	5.5 =	96.4 =	close		+
Celestion FTX1225 v2024	47.3 +0.3	0.396 -0.03	84.6 +3.3	5.9 +0.4	96.8 +0.4	close		+
PHL Audio 4511	48 +1	0.406 -0.02	74.1 -7.2	5.4 -0.1	96.2 -0.2	close	Xmax 5.4 mm < 5.5 mm: lower excursion-limited SPL	+
Radian CRS1230	48 +1	0.464 +0.04	76 -5.3	5.5 =	95.8 -0.6	close		+
PHL Audio 4531 v2023	46 -1	0.399 -0.03	71.9 -9.4	5.6 +0.1	95.9 -0.5	close		+

Compare the closest 3 against the SMOOTH BS 12N/250A →

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.