Ashley Stereo 7-Band PQX Series Parametric EQ : Ashly has completely redesigned and upgraded its parametric designs to include 5 fully parametric bands per channel, sweepable over the entire audio range from 20Hz to 20kHz. Bandwidth adjustment ranges from 3.3 octaves to 1/20th of an octave for very selective frequency filtering (tight enough to EQ an individual musical note!). Tunable low and high shelving are also provided to equalize frequency extremes with bypass switching offered on all filters and the master. The PQX-571 is a single space, single channel unit and the PQX-572 is a stereo or dual channel 2 rack space unit both featuring balanced XLR, TRS and terminal strip inputs and outputs. Ashly products always offer Quality without compromise.