Atma-Sphere | Signature Sound

Amta-Sphere

Atma-Sphere music systems, inc. is a small company in Saint Paul, MN that has been making world-class vacuum tube music 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.

Atma-Sphere S-30 MK III.1 Stereo OTL Amplifier – $3,990. Good OTL amps are just expensive to make… complexity from the power supply to the number of tubes requires drives up cost, but Ralph Karsten at Atma-Sphere has put together a great sounding hand-wired 30W/Ch OTL that cut no corners in a category where such (OTL) amps cost much more.The fully balanced, very stable & reliable design delivers the purity of tube tone that no other type of amplifier can. Click here to view manufacturer web page for the S-30 MKIII.1.

Optional Features:

Power Supply Boost option: $400
V-Cap Teflon® coupling caps: $500
V-Cap Copper Foil Teflon® coupling caps: $600
Caddock® resistor package: $1270

Amplifier

Signature Sound High-End Audio

Amta-Sphere

Atma-Sphere S-30 Mk III.1