ESB Audio HB 10 US 10"/250 mm Active Underseat SubwooferHarmony Back from the 80s The Harmony brand was launched in the 1980s, together with the first home loudspeakers produced by ESB. The production of Harmony car speakers began in the 90s, with a wide range of products that combined high quality performance at a lower price than the ESB speakers themselves, yet without ever forgetting the final goal high fidelity speaker capable of reproducing the entire sound spectrum. This year, Harmony returns to the