Speaker - Celestion, 12", T.F. Series 1225, 250W, 8Ω

Speaker - Celestion, 12", T.F. Series 1225, 250W, 8Ω image 1
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Speaker - Celestion, 12", T.F. Series 1225, 250W, 8Ω

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Rated at 250 W. For use in 2-way or compact 3-way systems, the 1225 bass and mid range driver has a high sensitivity and excellent power handling characteristics.

RoHS Compliant
Item ID:
Celestion Part Number:
CelestionCelestion T.F. Series
Product Measurements by Type
Chassis TypePressed steel
Coil MaterialRound copper
Cone MaterialKevlar-loaded paper
Cut-out Diameter283 mm
D260 mm
Diameter12 in.
Diaphragm/Coil Mass (Mmd)39.60 g
Electrical Q Factor (Qes)0.54
Equivalent Acoustic Volume (VAS)54.5 liters
Force Factor (BxL)13.20 Wb/m
Former MaterialPolyimide
Frequency Range50 Hz - 4,000 Hz
Gap Depth8 mm
Magnet TypeFerrite
Magnet Weight42 oz.
Maximum Linear Displacement (XMAX)2.5 mm
Mechanical Compliance (CMS)0.14 mm/N
Mechanical Moving Mass (MMS)46.51 g
Mechanical Q Factor (QMS)6.70
Mechanical Resistance of Driver (Rms)2.76 kg/s
Mounting Hole Bolt Circle Diameter297 mm
Mounting Hole Diameter7.9 mm
Mounting Slots4
Nominal Diameter12 in.
Nominal Impedance8 Ω
Overall Depth130 mm
Overall Diameter309 mm
Power Rating250 Wrms
Resonance Frequency (ƒS)63 Hz
Sensitivity97 dB
Surround MaterialCloth-sealed
Total Q Factor (QTS)0.50
Voice Coil DC Resistance (Re)5.13Ω
Voice Coil Diameter2.5 in.
Voice Coil Inductance @ 1 kHZ (LE)0.84 mH
Voice Coil Winding Width13 mm
Packaging Information
Packaging Dimensions13.3 in. × 13.3 in. × 6.5 in.
Weight (Packaging)9.85 lbs.

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Specifications, Files, and Documents

PDF: Specification Sheet Specification Sheet143.62 KB

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