U66 Elektronik was a Swedish brand that was located in Gothenburg, Sweden.

They marketed, manufactured an sold HiFi equipment both for the DIY market in kit-form and complete products. Main products were amplifiers and speakers. They designed all products in house. Chief engineer was Lars Mürbeck. He collaborated with designers mainly for the speaker kits.

Brands that were used in their spekaerkits were Coral, Gamma, Isophon, Hokotune, JBL, KEF, RCF, Sinus and Philips.

Their first product TEXAN was a receiver with 2 x 30 watts, FM only. They sold them complete or as DIY kit. Many thousands of them were produced. It stayed in their product range very long. Second product was a Bass-driver - an amplifier purposed to drive subwoofers and basshorns. Active and passive crossover