TF1225CX

Features

• 12" coaxial loudspeaker with 40-18,000Hz response

• 250Wrms (AES standard) power handling and 97dB sensitivity

• 2.5" high temperature copper voice coil wound on polyimide for increased reliability

• Robust and reliable pressed steel frame ferrite magnet LF driver

• Compact, lightweight neodymium compression driver - 80º nominal coverage

Frequency Response and Impedance Curves

TF1225CX

Coaxial, pressed steel chassis driver

General Specifications: LF

Nominal diameter . . . . . . . . . . . . . . . . . . . . . . 305mm/12in

Power rating 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . 250Wrms

Nominal impedance. . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Ω

Sensitivity 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97dB

Frequency range . . . . . . . . . . . . . . . . . . . . . . . . 40-4000Hz

Voice coil diameter . . . . . . . . . . . . . . . . . . . . . 64mm/2.5in

Chassis type. . . . . . . . . . . . . . . . . . . . . . . . . . Pressed steel

Magnet type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ferrite

Magnet weight . . . . . . . . . . . . . . . . . . . . . . . . . . 1.2kg/42oz

Coil material . . . . . . . . . . . . . . . . . . . . . . . . . Round copper

Former material . . . . . . . . . . . . . . . . . . . . . . . . . . Polyimide

Cone material . . . . . . . . . . . . . . . . . . . Kevlar loaded paper

Surround material . . . . . . . . . . . . . . . . . . . . . Cloth-sealed

Suspension . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Single

Xmax 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.5mm/0.098in

Gap depth . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8mm/0.31in

Voice coil winding width. . . . . . . . . . . . . . . . . 13mm/0.51in

Small Signal Parameters

D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.26m/0.24in

Fs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71.4Hz

Mms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49.68g/1.75oz

Mmd . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42.76g/1.51oz

Qms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.824

Qes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.480

Qts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.426

Re . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.57

Ω

Vas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39.91lt/1.41ft

3

BI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16.08Tm

Cms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.10mm/N

Rms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.83kg/s

Le (at 1kHz) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.23mH

General Specifications: HF

Power rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75Wrms

Nominal impedance. . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Ω

Sensitivity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110dB

Frequency range. . . . . . . . . . . . . . . . . . . . . 1200-18,000Hz

Recommended min. crossover (12dB/oct) . . . . . . . . 2200Hz

Voice coil diameter . . . . . . . . . . . . . . . . . . . . 45mm/1.75in

Magnet type . . . . . . . . . . . . . . . . . . . . . . . . . . . Neodymium

Diaphragm and surround material . . . . . . . . . . . . PETP film

Mounting Information

Overall diameter . . . . . . . . . . . . . . . . . . . . . 309mm/12.2in

Overall depth . . . . . . . . . . . . . . . . . . . . . . . . 172mm/6.77in

Cut-out diameter . . . . . . . . . . . . . . . . . . . . 283mm/11.14in

Mounting slot dimensions . . . . . . . . . . . . . . . . ø 7.9mm/0.31in

Number of mounting slots. . . . . . . . . . . . . . . . . . . . . . . . . 4

Mounting PCD range . . . . . . . . . . . . . . . . . 297mm/11.69in

Unit weight . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.6kg/10.1lb

1. Tested for two hours using a continuous, band-limited pink noise signal as per AES standard. Power calculated on minimum impedance. Loudspeaker tested in free air.

2. Measured on axis at 1W, 1m in 2 π anechoic environment.

3. Xmax derived from: (voice coil winding width-gap depth)/2.

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