* 4.5" Very Large Format Voice Coil
* 6800 Watts Peak Power Handling
* Active Balanced Cooling
* Ferrite Magnetics
* Square Wire Inside/Outside Coil Design
* Double Spider Suspension
* Integrated Demodulation Rings
* Die Cast Aluminum Chassis
The SD18-6800CA is a high output low frequency transducer.
The 18 inch (457mm) diameter piston will produce extremely high sound pressure levels at very low frequencies & is ideal for high level deep bass & sub woofer response in both live sound & recorded music venues.
The operating range is 30Hz to 200Hz.
The transducer uses high energy ferrite magnetics to achieve a very high acoustic output to weight ratio.
The SD18-6800CA employs a very large 4.5 inch (114.4mm) diameter voice coil that provides an AES rated 1700 watts of continuous power handling & a full 6800 watts of peak rated power handling when sufficient amplifier headroom is available.
It is recommended that the transducer be loaded into a properly designed vented enclosure & that active high order high pass filtering be employed if extremely high power levels are expected at low frequencies.
The SD18-6800CA 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 & extended low frequency 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.457 mm/18 in
Power rating.1700 \N(aes)
Frequency range.30-200 Hz
Chassis type.Cast aluminum
Magnet weight.3.17 kg/111.8 oz
Voice coil diameter.114.4 mm/4.5 in
Former material.Glass fiber
X-max.4.8 mm/0.19 in
Gap depth.15.0 mm/0.31 in
Voice coil winding width.24.7 mm/0.64 in
Net Weight.14.2 kg/31.3 lb
Packing Dimension WxDxH.505 x 505 x 275 mm
Shipping Weight.16.0 kg/35.3 lb
Small Signal Parameters
Mms.307.7 g/10.85 oz
Mmd.283.0 g/9.98 oz
Vas..99.72 lt/3.52 ft?
Le (at 1kHz).1.02 mH