4-Slot 500 Series Rack with Per-slot Power Handling and Channel Linking The Heritage Audio OST-4 v2.0 is a 500 Series chassis that accommodates up to four modules. The OST-4 v2.0 features On Slot technology, which leverages next-gen power electronics to handle module power requirements on a per-slot basis. In the OST-4 v2.0, each slot is specd with its own linear power-supply regulation stage, keeping each module isolated from the rest. Modules only share the metal enclosure. Sweetwater engineers agree that this is an effective method for eliminating common issues that can occur when sharing power between modules of different brands. An exciting feature of this second-generation model is the Link feature, which allows each channel to be linked to its next neighboring channel at the press of a rear-panel button no patch cables required.Dont merely house your 500 Series modules optimize their performance 500 Series racks are a