It has been known for over fifty years that loudspeaker systems and individual drivers suffer from Time-Frequency Distortion: different frequencies pass thorough a loudspeaker at different rates. This causes smearing of starting transients and temporal disconnection of fundamentals and their related harmonics. This book describes an effective method of reducing Time-Frequency Distortion causing major improvements in Stereo Imaging, Detail Resolution, Realism and Depth of Field.