ISE 2014: Allen & Heath Adds Qu-24 Compact Digital Mixer Range, Shows for First Time in EuropeFebruary 9, 2014 | Home / February 9, 2014 rave-video / ISE 2014: Allen & Heath Adds Qu-24 Compact Digital Mixer Range, Shows for First Time in Europe ISE 2014: Allen & Heath Adds Qu-24 Compact Digital Mixer Range, Shows for First Time in Europe