The Rane Model PE 15 Parametric Equalizer is a single channel 5-band device of incredible versatility. It incorporates all the required features of a parametric Equalizer and full- function notch Filter et. Each of the five Filter in the PE 15 cover a center Frequency range of four octaves, a Bandwidth of .03 to 1.5 octaves, and a boost/cut range of +15 dB to -20 dB. Bands one and five Switch to allow peaking or shelving characteristics. Special attention to the design of the state-variable Filter make all of these adjustments possible. All parameters are completely independent. To the user, this means any control may be operated in any order without affecting the others. This flexibility makes the PE 15 ideal for all audio contouring applications. A range that begins with the sharpest of notch Filter and continues through broad-band program contouring.