The Medusa Power Series is designed specifically for use with mixing 
boards that incorporate built-in power amplifiers. Each Power Medusa 
is constructed of a heavy-duty steel stage box with female XLR inputs, 
TRS 1/4" returns, and four 1/4" speaker connectors.  Whirlwind Power 
Series multipair cable is a cable within a cable-the outer layer contains 
audio pairs surrounding an inner core of 2 pairs of 14 ga. wire that has 
its own overall foil shield and jacket. Each of the two speaker lines is 
terminated with 2 paralleled 1/4" jacks on the box. A heavy-duty wire 
mesh strain relief secures the multipair cable to the box, and a wire mesh 
hanger grip is provided at the fanout. Available in 8x1, 12x4, and 16x0 
input channel configurations and 50, 100, or 150 ft. lengths.