About Us
 
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. We have 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. Furthermore, 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 both an unmatched capacity to reproduce music and an intrinsic reliability heard nowhere else.
Atma-Sphere Music Systems, inc.
1742 Selby Avenue
St. Paul, MN 55104
(651) 690-2246
ralph@atma-sphere.com



Arizona

USA Tube Audio

  • 8355 E Butherus
  • Scottsdale, Arizona 85260
  • 1-800-676-1085
  • Charlie

Idaho

AudioKinesis

Illinois

Essential Audio


Michigan

Classic Audio Reproductions

Minnesota

Audio Perfection


New Hampshire

Sounds of Silence


New Jersey

HiFi Logic

Nevada

Electra-Fidelity


New York

Triode Picture & Sound

Signature Sound

Canada

Alternative Audio

High End Audio Exchange

  • 1426 Sierra Ave
  • Kingston, Ontario
  • K7P 3H2 Canada
  • (613) 767-4321
  • Francois

China

Trilix'An Inc.

  • #925 Run Ze Yue Xi
  • Bei Yuan Road
  • Chao Yang District
  • Beijing 100012
  • P.R.China
  • Tel. +86 133 6688 9363
  • Mr. Li Xuan

Denmark

HiFi Analyse


France

ATEAM sas

  • 75018 Paris, France
  • Tel. +01 4342 9398
  • Fabien

Germany

Himmlisch Hören

  • Merianstr. 20, 44801
  • Bochum, Germany
  • Tel. +49 0234 / 70 80 43
  • Fritz

Greece

Anakrousis

  • Lucas Stephanides
  • 35, M. Mercouri St.
  • Kordelio, Thessaloniki 56334
  • Greece
  • Tel. +30 2310 773001
  • lucastef@otenet.gr

Guatemala

Jorge Deman


Indonesia

PT. Danumuri Adhika

Italy

Pro Audio Italia

  • Via Dominico Cirillo 2
  • 70022 Altamura (Ba)
  • Italy
  • Tel. +39 080 314.32.24
  • Michele
Netherlands

Revinylized BV


Norway

Loddefjord HiFi

  • Gamle Mathopsvei 22b
  • 5173 Loddefjord, Norway
  • mob.phone: +47909 92 551
  • Kjetil Melvik

Serbia and Montenegro

Sretenovic Audio

  • Vojislava Ilica 131
  • 11050 Belgrade
  • Serbia & Montenegro
  • Tel. +381 11 3223 854
  • ssret@eunet.yu

Singapore

Jay Audio

  • 75 Nim Road
  • #05-03 Nim Gardens
  • Singapore 807585
  • Tel. +65 6292 2773
  • SP Lim
Slovenia

UBIQ Audio


Sweden

Audio Concept


West Indies

Semprie and Mitchell

  • 18 Laurier St., Morvant
  • Republic of Trinidad and Tobago
  • West Indies
  • Fax +1 868 624-3847
  • sempriemtt@yahoo.com