Check the listing for details. PreSonus StudioLive 64S 64-channel Digital Mixer. Condition: Very Good - Refurbished. Listed at 3599.99 USD. The Most Formidable StudioLive Yet The StudioLive 64S is a powerhouse — it’s PreSonus’s most formidable offering yet. This 64-channel digital mixer boasts a quad-core FLEX DSP engine with enough muscle to drive 526 simultaneous processors, and then some. What’s more, its FLEX FX multi-effects processor vaunts eight slots of reverb emulations and delays with eight dedicated effects buses. Benefit from easy expandability thanks to built-in AVB networking. Enjoy versatile operation by virtue of the 64S’s 32 Flex Mixes. Shape and polish each channel to perfection courtesy of PreSonus’s lauded Fat Channel processing.Quad-core FLEX DSP engine boasts impressive processing muscle The StudioLive 64S is packed with serious power.