* 3.9" Very Large Format Voice Coil
* 4000 Watts Peak Power Handling
* Active Balanced Cooling
* Ferrite Magnetics
* Square Wire Inside/Outside Coil Design
* Single Spider Suspension
* Integrated Demodulation Rings
* Die Cast Aluminum Chassis
The SD12-4000CA is a high output wide bandwidth transducer designed for low frequency response in two way designs & for high output mid bass The 12 inch (305mm) diameter piston will produce extremely high sound pressure levels at both low & mid band frequencies.
This design is optimized for both live sound & recorded music venues.
The transducer uses high energy ferrite magnetics to achieve a very high acoustic output to weight ratio.
The SD12-4000CA has been optimized for use in two & three way sound reinforcement system designs & may be used in either mid bass or low frequency applications.
The operating bandwidth is 60Hz to 3000Hz.
The SD12-4000CA employs a large 3.9 inch (99.3mm) diameter voice coil that provides an AES rated 1000 watts of continuous power handling & a full 4000 watts of peak rated power handling when sufficient amplifier headroom is available.
The SD12-4000CA utilizes P Audio s Auto Balanced Cooling (ABC) technology to not only improve transducer power handling & reliability but to also increase power compression performance by carefully balancing & directing airflow to critical areas.
The voice coil design is an inside/outside" geometry w/P Audio's square wire technology to improve conversion efficiency & provide a very large cross-sectional area for superior cooling.
System linearity is achieved by employing magnetic flux demodulation devices in the structure to increase fidelity & sonic accuracy.
The system suspension has been designed specifically for high linear displacement for both low frequency & mid band response.
The double spider design insures very high displacement & linear response while maintaining excellent control.
The transducer chassis is a die cast aluminum design that insures a very high degree of structural integrity.
Nominal diameter...305 mm/12 in
Power rating....1000 Watts(aes)
Nominal impedance....8 Ohms
Frequency range..60-3000 Hz
Chassis type...Cast aluminum
Magnet weight...5.20 kg/183.5 oz
Voice coil diameter...99.3 mm/3.9 in
Former material...Glass fiber
X-max...4.65 mm/0.18 in
Gap depth...12.0 mm/0.47 in
Voice coil winding width...21.3 mm/0.84 in
Net Weight...11.8 kg/26.0 lb
Packing Dimension WxDxH..355 x 355 x 190 mm
Shipping Weight..12.6 kg/27.8 lb
Small Signal Parameters
Mms....80.3 g/2.83 oz
Mmd....73.3 g/2.59 oz
Vas...39.05 lt/1.38 ft?
Le (at 1kHz)....0.69 mH
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