Technologies Innovative Sound Engineering Planar Magnetics Discover Regenerative Transmission Line® RTL Subwoofer Discover Line Source Technology Discover Point Source Technology Discover Show less You may also be interested inRelated Products You may also be interested in Calibration Services We provide Factory Calibration & System Commissioning Services on all Wisdom Audio projects. This service is in place to ensure the Wisdom Audio system you purchased is setup properly and performing to our standards. Wisdom LS4 The Wisdom Series LS4 is the latest planar magnetic thin-film technology and represents an uncompromised engineering effort to achieve the ultimate in music and film sound reproduction. Design & Quote Services As a service to our dealers we provide, at no cost, custom quotes that include speaker layout, subwoofer analysis, and system design based upon room size and budget.