HEDD (Heinz Electrodynamic Designs) is a German high-end audio maker founded in 2015 in Berlin by physicist Klaus Heinz and his son, Dr. Frederik Knop. The brand specializes in analog-designed, DSP-optimized active studio monitors, subwoofers, and flagship AMT‑driver headphones (HEDDphone), all handcrafted in Germany. Known for cutting-edge Air Motion Transformer tweeters, zero-phase “Lineariser” filtering, and modular digital connectivity (HEDD Bridge), their MK2 series delivers precise, uncolored sound that appeals to both professionals and hi‑fi enthusiasts.