Sydney Hi-Fi Mona Vale Established in 2010, Sydney Hi-Fi Mona Vale is a premier audio-visual specialist serving Australia’s Northern Beaches. Led by Mick and Carmelina Stillone, the team brings over 30 years of combined expertise to custom home theatre, automation, and multi-room entertainment solutions. Known for personalized service, a state-of-the-art showroom, and award-winning excellence—named Australia’s #1 Hi-Fi Retailer in 2022 and 2023—Sydney Hi-Fi Mona Vale delivers high-performance experiences for every lifestyle and budget.