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Blue Note Audio is an Italian car audio brand operating under the Harmony/ESB Audio group, which was founded in 1969. The brand draws its name from the Blue Note Jazz era (1930-1950), reflecting a philosophy of classic sound quality and musical authenticity. Blue Note specializes in car audio systems including 2-way speaker systems, coaxial speakers, subwoofers, and DSP amplifiers designed to deliver 'classic' sound characteristics. The brand operates within the APEX Group structure, which includes ESB Audio and ZAPCO Electronics, providing comprehensive car audio solutions. Blue Note products are engineered to bring the warmth and character associated with classic jazz recordings to modern automotive sound systems. This is distinct from the famous Blue Note Records jazz label, representing instead a focused approach to car audio that emphasizes musicality and tonal accuracy. The brand continues active operations as part of the Italian-based ESB Audio group, serving European and international car audio markets with products that bridge traditional audio values and contemporary automotive technology.