MK Sound (formerly Miller & Kreisel) is a professional audio company with a complex history beginning in 1973 when Ken Kreisel and Jonas Miller founded the original company in a Los Angeles storefront. Their breakthrough came when Walter Becker of Steely Dan commissioned the world's first balanced dual-drive subwoofer for Pretzel Logic mixing sessions. After the original Miller & Kreisel filed Chapter 7 bankruptcy in 2007, Danish audio veterans acquired the intellectual property and formed MK Sound. The company changed from American to Danish ownership in 2007, now based in Netherlands with MK Sound ApS Denmark operations. Recently, the company changed its name to M&K Sound and relaunched the Miller & Kreisel name on home speakers. The current company maintains the legacy through professional studio monitors and consumer audio products, though it operates separately from original founders Ken Kreisel and Jonas Miller. The brand continues 'The Choice of Professionals' tradition with recent partnerships and product launches in 2025.