A recent announcement Logitech unveils development of four new speaker systems. The company rolls out the Z323, Z523, Z520 and Z320 audio speakers that should excite the dedicated music listeners. Packed with an array of advanced features, the systems are made to raise the overall entertainment experience. The 40 watts Z523 speaker system in the various beams of interesting features. These include 1 double RCA jack and 3.5mm jack which provides support for the Logitech Squeezebox network m