About MK Analogue

Matej Kelc, who founded MK Analogue together with Markus Wierl (Audio-Freak) in 2021, built his first transformer already in 1982. He was fascinated by this type of device at a very young age. Because he loved music so much and in the same time was fascinated by the audio technology behind it.

So he spent the first years of his career in the Hi-Fi and pro-audio industry: as a salesperson, then he moved on to a consultant and developer. He started maintaining and modifying audio equipment for his customers and others, and later he designed and built custom-made, portable mixing consoles for film sound engineers.

Soon the commercially available modules available were no longer good enough for him, so he began to develop and build his own microphone preamps. It’s not really that far from a microphone amplifier to a transformer… He made the first devices of this type in small batches in the 80s and 90s, mostly for his customers, but also for major Hi-Fi dealers and manufacturers.

In 2000 Kelc returned to Slovenia, where he spent five years of his childhood. He successfully established a network of suppliers for electronics, metalwork and woodwork. And still worked for the German High End Industry.  At the same time, he worked passionately  for his private audio projects and the development of „the perfect step-up-transformer“.

Markus Wierl bought one in 2018 for his private highend setup. His enthousiasm about the approach and especially the sonic results of Matej Kelc step-up transformers marked the birth of MK Analogue, that was founded in 2021.

The company soon established its step-up-transformers SUT-1L and SUT-1M in the German and European market, and added other phono components to the portfolio: The MM-PH-AMP and the modified Denon Cartridge DPU-103.

Matej Kelc passed away suddenly and unexpectedly in September 2025. Since then, MK Analogue has been continued as a brand of Markus Wierl GmbH, and all products are being manufactured 1:1 with the established suppliers and in accordance with Matej Kelc’s concepts. However, the final production, previously the domain of Kelc in Slovenia, has been relocated to Germany and placed in expert hands in order to meet the high quality standards.

“Every MK Analogue device conveys Matej Kelc’s love and unique feel for music, and that’s how it should stay.“

And so we can be happy that Matej Kelc’s legacy is in good hands and will make many hi-fi enthusiasts happy …