At the heart of the APIA PRO AUDIO® integrated system approach, the QDX-13 amplified controller offer cutting edge loudspeaker amplification, DSP, network control, and comprehensive system protection in a single ergonomic package. Based on similar platforms, the exceptional and ground-breaking performance level delivered by the QDX-13 unit allow full optimization of the resources of all APIA PRO AUDIO® systems and deliver outstanding audio quality combined with the best possible transducer protection.