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Atma-Sphere Tube Amplifier Forum
Learn from Ralph Karsten the Atma-Sphere founder/designer and discuss with fellow owners.
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STICKY THREADS
Sticky
What an OTL is, and why you should care
Atmasphere
Sep 22, 2014
3
4
5
Replies
90
Views
32K
Oct 5, 2021
Mrmb
M
NORMAL THREADS
Oh-m'-god--bought a pair of MA-1/3.1s thru USAudiomart.
jeffreybehr
Dec 28, 2018
2
Replies
31
Views
8K
Jul 18, 2022
Phantom-Audio
B
Atma-Sphere MP-3 - giving some thought to whether to buy one vs alternatives...
Bergm@nn
May 22, 2022
Replies
15
Views
2K
Jun 14, 2022
Atmasphere
N
About to buy MA-1 monos- how long do the tubes last and how easy are replacements to source?
Nuforce
Apr 18, 2022
2
3
4
Replies
70
Views
4K
Jun 14, 2022
Nuforce
N
Atma-Sphere Nirvana OTL Monoblock Amplifiers
Phantom-Audio
May 18, 2022
Replies
15
Views
1K
Jun 8, 2022
Phantom-Audio
N
Anyone had success using 6080 tubes in atma-sphere amps?
Nuforce
May 29, 2022
Replies
6
Views
625
May 31, 2022
microstrip
Atma-Sphere MP-1 in Rare Gold/Silver Chassis
Phantom-Audio
May 25, 2022
Replies
5
Views
535
May 25, 2022
tima
Field Coil Speakers @ 16 Ohms for OTL
Phantom-Audio
Aug 9, 2021
2
Replies
38
Views
6K
Mar 29, 2022
jw5115
J
Atma-Sphere MA-2 Amplifier
Ron Resnick
Mar 1, 2017
2
Replies
24
Views
9K
Mar 25, 2022
Atmasphere
A
Atma-Sphere MP-1 preamplifier as tape head preamp: anyone with experience ?
adrianywu
Mar 13, 2022
Replies
7
Views
1K
Mar 23, 2022
Atmasphere
R
What Cables Are You Using With Atma-Sphere Gear & Why?
rhopkins
May 12, 2010
2
Replies
27
Views
15K
Feb 8, 2022
DetroitVinylRob
A
.2 mv cartridge ok with MP-1 V3.1?
Avidlistener
Nov 27, 2021
Replies
6
Views
1K
Nov 29, 2021
microstrip
Improved some parts in my Atma-Sphere M-60/3.3 poweramps
jeffreybehr
Dec 24, 2018
Replies
19
Views
6K
Aug 23, 2021
El34bluglo
E
F
Atma-sphere MA-1 MK 3.3 - Fuse Replacement Vs. Upgrading Power Cord
ferrox
Jan 10, 2018
Replies
2
Views
4K
Aug 12, 2021
Addicted to hifi
Atma-Sphere Nirvana Amplifiers
Phantom-Audio
Apr 26, 2021
Replies
17
Views
3K
May 19, 2021
Atmasphere
L
What is it about direct heated triodes?
Loheswaran
Oct 6, 2020
Replies
13
Views
3K
Apr 26, 2021
Phantom-Audio
R
Differences Between Chinese and Russia 6AS7 Tubes
rhopkins
May 12, 2010
Replies
15
Views
16K
Apr 26, 2021
Phantom-Audio
C
Anyone hear the MA-3?
caesar
Mar 14, 2011
Replies
17
Views
16K
Feb 8, 2021
Brian Walsh
Atmas M-60 with ZU Druid VI
olivier
Nov 5, 2020
2
Replies
31
Views
4K
Nov 16, 2020
the sound of Tao
O
Atma Model M-60 MkII - The missing 407
Olindian
Oct 19, 2019
Replies
0
Views
1K
Oct 19, 2019
Olindian
O
M
MA-1 Lumen Reduction for the Red/Yellow Lamps
Mrmb
Aug 27, 2019
Replies
7
Views
2K
Oct 3, 2019
Atmasphere
And now it's the MA-1s in the system and with fewer output tubes
jeffreybehr
Jul 3, 2019
Replies
2
Views
2K
Sep 15, 2019
jeffreybehr
Reinstalled M-60s in the system, driving Serenity Super-7s
jeffreybehr
Mar 9, 2019
Replies
1
Views
2K
May 12, 2019
jeffreybehr
R
6080 Tubes or Alternate to the 6AS7 Tubes
rhopkins
May 12, 2010
Replies
1
Views
6K
Dec 16, 2018
jeffreybehr
Atma-Sphere MP-1 Mk 3.3
Brian Walsh
Oct 29, 2015
Replies
12
Views
15K
Oct 6, 2017
ferrox
F
New preamp called the Ultraviolet!
Atmasphere
Jul 21, 2014
Replies
16
Views
20K
Mar 7, 2015
Brian Walsh
New Atma-Sphere amp
Gregadd
Nov 14, 2012
Replies
7
Views
9K
Nov 20, 2012
Atmasphere
Atma-Sphere Cutting Lathe
Gregadd
Aug 30, 2012
2
Replies
32
Views
23K
Sep 10, 2012
MylesBAstor
Last of the cowboys
Gregadd
May 8, 2010
2
Replies
20
Views
16K
Jul 9, 2011
Brian Walsh
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