Zapco DSP-Z8 IV AT 8-Ch. DSP with AutoTuneThe new DSP IV Series Some years ago, Zapco introduced the new DSP Z8 IV signal processor. It was designed to bring true audiophile sound quality to an affordable DSP. The DSP Z8 IV provided sound quality superior to units costing even twice as much. The DSP Z8 IV has been a true giant killer. But, as we have always said, and always will say, We believe we can still do better. We firstly presented the DSP Z8 IV II, and this year we present the Zapco