Koen Groeneveld – Stesstjopper (Original Mix) Koen Groeneveld returns with a dark and groovy release on his Abzolut imprint, "Stesstjopper," just in time for Amsterdam Dance Event. Related Posts: Premiere: Innellea creates techno intangibles with lead single from upcoming EP, ‘It’s Us’ ADE slates Richie Hawtin, 3LAU, CAA, and more for free livestream discussion series ‘In Conversation,’