Related Manuals for Atma-Sphere MP-3
Summary of Contents for Atma-Sphere MP-3
- Page 1 Atma-Sphere Music Systems 160 So. Wheeler St. Paul, MN 55105 Phone: 651-690-2246 FAX: 651-699-1175 ATMA-SPHERE® MUSIC PREAMPLIFIER Model MP-3 OWNER'S MANUAL Please study this document carefully before using equipment...
- Page 2 Please read the manual carefully and follow the instructions closely. If you have any questions, do not hesitate to contact your dealer or ATMA-SPHERE® MUSIC SYSTEMS. Here's to many years of happy listening!
-
Page 3: What Is Covered
Music Systems, 160 So. Wheeler St., St. Paul, Minn. 55105. You must pay the initial shipping charges, but Atma-Sphere® Music Systems will pay the return charges, if the repairs are covered by the warranty. All products MUST be shipped in the original carton(s) or in replacement cartons supplied by Atma- Sphere®... -
Page 4: Operating Notes
12AT7 phono tubes should be checked every 6 months if the unit is left on continuously. The unit will sound substantially better three hours after turn-on. Use the MP-3 with a low impedance (600 ohm) load at the input of the power amplifier if possible. Such practice results in reduced possibility of hum and buzz in most cases. - Page 5 RF beads also. For best results, the phono cable should be shielded. Aviod using NOS 12AT7s in the MP-3. Most such tubes are much too noisy for proper operation! Please purchase new 12AT7s from your dealer or Atma-Sphere Music Systems. Most 12AT7s tend to get noisy after only a few thousand hours so if you leave the preamp on 24 hours a day the phono tubes should be replaced every 3-4 months.
- Page 6 High-Level Hookup The auxiliary inputs are high impedance. Thus you may use any input as a source for the MP-3. If you are using a low impedance source, a low impedance termination is recommended for better sound. A single-ended source can also be used, by applying the signal between either pin two or pin three of the input XLR, and ground.
-
Page 7: Troubleshooting Tips
NEVER, EVER, USE TWEEK® ON TUBE SOCKETS! Tweek® is an organic compound and is capable of forming resistance paths if it breaks down. If none of these suggestions help, please contact your dealer or ATMA-SPHERE® MUSIC SYSTEMS. MORE TIPS AND TWEAKS You can reduce the noise level beyond the specification by using low noise tubes. - Page 8 NOTES...
- Page 9 WARRANTY REGISTRATION FORM IMPORTANT: This form must be filled out and returned to ATMA-SPHERE® MUSIC SYSTEMS within 10 days of purchase to validate the warranty! Please type or print clearly. NAME__________________________________________________________________________________ Address_________________________________________________________________________________ City or town ________________________________________State______________zipcode________________ Country_________________________________________________________________________________ Name of dealership__________________________________________________________________________...
- Page 10 MAIL TO: ATMA-SPHERE MUSIC SYSTEMS, 160 So. Wheeler St., St. Paul, MN 55105 USA...