Sub Focus Announces Biggest Ever Headline At Alexandra Palace In London He Will Bring His Acclaimed Circular Sound Show To The Iconic London Venue On Friday 7th March 2025 Pre-Sale Tickets Available Thursday 9th October At 10Am Sub Focus Has Announced His Biggest-Ever Headline Show. Taking Place At Londons Iconic Alexandra Palace On Friday 7th March 2025, Sub Focus Will Be Bringing A Brand New Version Of His Acclaimed Live Show, Circular Sound, To The 10,000-Capacity Venue - Having Previously Sold Out Headline Shows At Londons Printworks And Ovo Wembley Arena.