Activator (Manuel Tessarollo) is an Italian hardstyle producer. He produces music since the early 2000's and is known under many aliases: Acti, DJ Act, DJ Mantes, DJ Stefano Bonato, Feita, J-Maican Ravers, Knockout, Lo-Fi, Manuel Es,Manuel Tessarollo, MC Joker, Outlaw, Overdrive, Prozact, Radical Core and Spy-Kore.

He is now producing techno under the alias T78.

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