After many years of research for the best amplification, Class G (Class G/H) seemed to be the most appropriate in terms of high power with low dissipation. Class G/H uses multiple power supply rails of various voltages, seamlessly switching to a higher voltage when the audio signal requires it and seamlessly switching back to lower [...]

The 1st study of AVAA and the active absorption was realized by HEPIA, the high school in Geneva. It was a travail de diplôme.

1992 - 2004 - Nice collaboration with Studer In 1992, Relec SA was mandated by Studer Professional to build their speaker range, A1, A3 and A5 which became later A14, A21 and A25. Since...

The own wood factory of Relec was created in Ste-Croix, allowing easiest treatment of the cabinets.

Launch of the PA series

With the arrival of the Quatuor 3 and their clever ISP function (circuit protection), it's the beginning of PSI speakers for the professional audio domain.