Transformer features front mounted tap selector switch with convenient access through the grille and is part of Lowell's 20/20 AudioVisionTM Series offering true 20Hz - 20kHz performance. 20/20 AudioVisionTM Transformers have full frequency response and high power handling which allows the speaker to operate at full potential while providing a stable load to the amplifier. The result is that 20/20 AudioVisionTM Transformers allow a distributed speaker system to sound the same as transformerless direct to voice coil system with easier wiring, less expense, and reduced labor.