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Atma-Sphere Founder Ralph Karsten

January 23 @ 2:00 pm - 4:00 pm


Join us for an interesting and informative afternoon with Ralph Karsten, founder and CEO of Atma-Sphere. Ralph will discuss his background, how he got into the HiFi business, his unique approach to amplifier design and the latest product line he’s working on – a class D GaN amplifier.  It should be an fascinating discussion how he’s decided to add such a different design choice in comparison to his OTL tube amplifiers.

From their website:

Atma-Sphere is a small company in Saint Paul, MN that has been making world-class vacuum tube amplifiers since 1976.

We are known for our unique approach to circuit design, resulting in multiple patents and the creation of the first, truly reliable Output TransformerLess (OTL) amplifiers. We made the first balanced-line products in the world of high-end audio, including the MP-1, which was the world’s first balanced-line preamp.

All of our amps and preamps are hand-crafted and made-to-order according to each customer’s needs. All of our components are hand-selected, and often custom-manufactured especially for us, right down to the wire we use.

The resulting products are unique in the world with an unmatched capacity to reproduce music with intrinsic reliability.

The Absolute Sound interviews Ralph Karsten

This is a free event for members in good standing, the Zoom meeting link will be sent out to attendees a few hours before the start time.

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January 23
2:00 pm - 4:00 pm


Zoom Meeting
CA United States



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