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1742 Selby Av.
St. Paul, MN 55104
651 - 690 - 2246 /FAX 699 - 1175
atma- sphere.com
Atma-Sphere S-30 Mk.II.3 amplifier quick setup and operation instructions
Installation: Place the amps in your system. Connect the preamp cables to the
appropriate input connectors on the front of the amp. If you use the RCA input connectors,
make sure shorting jumpers are installed between pins 1 & 3 on the XLR connectors else a
buzz may result. Verify that both power switches are OFF and connect AC power to the AC
input connector on the rear of the amp. Connect the negative speaker cables to the negative
output terminals and the positive speaker cables to the positive output terminals.
Setup: Install the tubes in their sockets. The front 6 sockets (no cooling holes) take the
6SN7GT driver tubes. All other sockets take the 6AS7G output tube. A total compliment of
six driver and ten output tubes are required. Engage the main power switch (left of center of
front chassis) and verify that the amber indicator lights. In about 15 seconds, the filaments of
all tubes should be visibly glowing orange. Wait at least one minute, then engage the standby
switch (right side of center of chassis) and verify that the red indicator lights. The amplifier
is now fully powered up.
DC Offset adjustment: Set the large toggle switch below the meter to the left.
Examine the reading on the meter. If it is NOT zero, adjust the left control to bring the meter
to a zero reading. Perform the same operation for the right channel, using the right hand
control. Return the switch to the center position. The amplifier is now ready to operate.
Operation: The amplifier can be left in either standby or operational mode
indefinitely. Avoid 4 ohm speakers; the amp will give its best performance on 16 ohm
speakers. If using an 8 ohm speaker, it is very important the speaker exhibit at least an 8 ohm
impedance at all frequencies. In any event, the speaker load should be one known to be easy
to drive. Speaker cables can have a rather dramatic effect and you are invited to experiment.
Fuses: All Atma-Sphere Music Amplifiers are fitted with a group of three (3) AC mains fuses on
the rear panel by the AC input connector. The closest to the AC connector supplies power to
the amplifier's output section, and is 5 Amp on 117 Volt models, 2.5 amps on 235V. If the amp
lights up but otherwise appears to be dead, check this fuse.
The middle fuse supplies power to the output tube filaments, and is 5 Amp on 117 Volt models,
2.5 amps on 235V. The third fuse supplies power to the driver supply and is 0.5 Amp on 117
Volt models, .25 amps on 235V. Failure of this fuse indicates service of the amplifier chassis is
required.
Copyright 2004 Atma-Sphere Music Systems Inc. 1742 Selby Av., St. Paul, MN. 55104 651.690.2246 / fax
651.699.1175
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Summary of Contents for Atma-Sphere S-30 Mk.II.3
- Page 1 Speaker cables can have a rather dramatic effect and you are invited to experiment. Fuses: All Atma-Sphere Music Amplifiers are fitted with a group of three (3) AC mains fuses on the rear panel by the AC input connector. The closest to the AC connector supplies power to the amplifier's output section, and is 5 Amp on 117 Volt models, 2.5 amps on 235V.
- Page 2 1742 Selby Av. St. Paul, MN 55104 651-690-2246/FAX 699-1175 atma-sphere.com LIMITED WARRANTY ON ATMASPHERE MUSIC SYSTEMS PRODUCTS This warranty on your ATMASPHERE MUSIC SYSTEMS product, which is distributed and warranted by ATMASPHERE MUSIC SYSTEMS, shall remain in effect for three (3) years from the date of consumer purchase, provided the enclosed registration form is completed and returned to ATMASPHERE MUSIC SYSTEMS within ten days of purchase. WHAT IS COVERED: Except as specified below, this warranty covers all defects in materials and workmanship. The following are NOT covered by the three year limited warranty: Vacuum tubes are covered for one (1) year, with the following exclusions, as per the rest of the warranty: Damage occurring during shipment (present claims to carrier). Damage resulting from failure or inability to follow proper instructions. Damage resulting from the performance of repairs or modifications by other than ATMASPHERE MUSIC SYSTEMS. WHAT WE WILL PAY FOR: ATMASPHERE MUSIC SYSTEMS will pay for all labor and material expenses for repairs covered by this warranty. HOW TO OBTAIN WARRANTY SERVICE: If your unit requires repairs covered by this warranty, you MUST obtain a return authorization number from ATMASPHERE MUSIC SYSTEMS. You are responsible for transporting the unit to ATMASPHERE MUSIC SYSTEMS, 1742 Selby Av., St. Paul, MN 55104. You must pay the initial shipping charges, but ATMASPHERE 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 ATMASPHERE MUSIC SYSTEMS. Contact ATMASPHERE MUSIC SYSTEMS for replacement cartons and cost. LIABILITY IS LIMITED TO THE REPAIR OR REPLACEMENT, AT OUR OPTION, OF ANY DEFECTIVE PRODUCT AND SHALL IN NO EVENT INCLUDE INCIDENTAL OR CONSEQUENTIAL DAMAGE OF ANY KIND.
- Page 3 WARRANTY REGISTRATION FORM MPORTANT: 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__________________________________________________State__________zipcode__________________ Country_______________________________________________________________________________________ Name of dealership____________________________________________________________________________________ Model _______________Date of purchase______________serial #_____________price paid____________ Optional: Comments concerning your dealer _______________________________________________________________________________________________...
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