TLS SERIES: AUDIOVISION™ TransformersAudioVision transformers provide true 20Hz 20kHz performancefull frequency response combined with high power handling that allow the driver to operate at full potential while providing a stable load to the amplifier. TLS transformers allow a distributed speaker system to sound imperceptibly the same as a transformer less direct to voice coil system with the benefit of easier wiring, less expensive wire, and reduced labor. Model No. Primary Voltage