Celestion TF1230S 12-inch, Pressed Steel Chassis, Ferrite Magnet Bass / Mid Driver
12 inch replacement woofer for Mackie SRM450 MK2 and MK3
Increased chassis diameter for compatibility with popular portable two-way reinforcement systems
Specifications
Nominal diameter: 305mm / 12in
Power rating: 300W
Continuous power rating: 600W
EIA power rating: 450W
Rated impedance: 8Ω
Sensitivity: 96dB
Frequency range: 50-4000Hz
Chassis type: Pressed steel
Magnet type: Ferrite
Magnet weight: 1.7kg / 60oz
Voice coil diameter: 75mm / 3in
Voice coil material: Edgewound copper clad aluminium
Former material: Polyimide
Cone material: Kevlar loaded paper
Surround material: Cloth-sealed
Suspension: Single
Gap height (Hg): 8mm / 0.31in
VC winding height (Hvc): 17mm / 0.67in
Parameters
Sd: 530.93cm2 / 82.29in2
Fs: 60.30Hz
Mms: 51.08g / 1.8oz
Qms: 3.28
Qes: 0.422
Qts: 0.374
Re: 5.98Ω
Vas: 54.41l / 1.92ft3
BI: 16.56Tm
Cms: 0.14mm/N
Rms: 5.91kg/s
Le (at 1kHz): 0.98mH
Xmax: 4.5mm / 0.18in
Mounting Information
Overall diameter: 317.5mm / 12.5in
Overall depth: 137mm / 5.4in
Cut-out diameter: 283mm / 11.14in
Mounting hole dimensions: 13x6.5mm / 0.51x0.26in
Number of mounting holes: 8
Mounting hole PCD: 299mm / 11.77in
Unit weight: 4.3kg / 9.5lb
Packed Dimensions & Weight
Single pack size W x D x H: 330mm x 330mm x 150mm / 13in x 13in x 5.9in
Single pack weight: 5.5kg / 12.0lb
Power rating: 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.
Continuous power rating: Defined as 3dB greater than the AES rating.
Sensitivity: Measured on axis at 1W, 1m in 2π anechoic environment.
Parameters: Measured after unit subjected to pre-conditioning signal.
Xmax: Hvc-Hg/2