Leben presents its new integrated CS300F

Audio equipment

Leben presents its new integrated CS300F

The CS-300F model is equipped with GE JAN 6197 valves, developed for use in computers. We are the first in the audio world to use this valve.

The 6197 valve produced by General Electric (USA) is a valve of particularly high quality that complies with the North American military standard JAN (Joint Army and Navy).

This valve is produced with special quality control from the beginning on an independent production line, separate from consumer valves and is intended for military supply.

We purchased these tubes several years ago and have since been searching for the best circuit design to get the most performance out of them.

For the circuit of drivers We have used the 17EW8 valve, produced for the world of hi-fi by the largest Japanese electronics manufacturer.


– Generous use of components of the highest quality

– WBT type connection terminals

– Circuit with self-adjusting bias that accepts new valves without having to adjust the bias and that can adapt to the consumption of the valves or to the inequality between them

– Side panels made of natural Canadian white ash wood. This wood is very hard and heavy and is generally used to make baseball bats and bass boat oars.

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Simon Müller

Simon Müller is the driving force behind UMusic, embodying a lifelong passion for all things melodious. Born and raised in New York, his love for music took form at an early age and fueled his journey from an avid music enthusiast to the founder of a leading music-centered website. Simon's diverse musical tastes and intrinsic understanding of acoustic elements offer a unique perspective to the UMusic community. Sporting a dedicated commitment to aural enrichment and hearing health, his vision extends beyond just delivering news - he aspires to create a network of informed, appreciative music lovers. Spend a moment in Mueller's company, and you'd find his passion infectious – music isn’t simply his job, it’s his heartbeat.