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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 21, 2014
3
4
5
Replies
91
Views
42K
Jan 28, 2024
DetroitVinylRob
NORMAL THREADS
Atma-Sphere MA-2 Amplifier
Ron Resnick
Feb 28, 2017
2
3
Replies
47
Views
14K
Mar 18, 2024
Dennis Meijer
D
Alternative to Caddock for MA-1 resistor upgrade
Nuforce
Jun 4, 2023
Replies
11
Views
3K
Jun 23, 2023
Atmasphere
Atma-Sphere Nirvana OTL Monoblock Amplifiers
Phantom-Audio
May 18, 2022
2
Replies
21
Views
11K
Dec 22, 2022
Audio_Karma
A
R
What Cables Are You Using With Atma-Sphere Gear & Why?
rhopkins
May 12, 2010
2
Replies
29
Views
18K
Dec 14, 2022
Phantom-Audio
A
NOS RCA 352 in MP-1 mkIII - noise using remote volume
Avidlistener
Nov 18, 2022
Replies
1
Views
1K
Dec 14, 2022
Phantom-Audio
Oh-m'-god--bought a pair of MA-1/3.1s thru USAudiomart.
jeffreybehr
Dec 28, 2018
2
Replies
31
Views
12K
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
4K
Jun 14, 2022
Atmasphere
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
9K
Jun 13, 2022
Nuforce
Anyone had success using 6080 tubes in atma-sphere amps?
Nuforce
May 29, 2022
Replies
6
Views
2K
May 30, 2022
microstrip
Atma-Sphere MP-1 in Rare Gold/Silver Chassis
Phantom-Audio
May 24, 2022
Replies
5
Views
3K
May 25, 2022
tima
Field Coil Speakers @ 16 Ohms for OTL
Phantom-Audio
Aug 9, 2021
2
Replies
38
Views
9K
Mar 28, 2022
jw5115
J
A
Atma-Sphere MP-1 preamplifier as tape head preamp: anyone with experience ?
adrianywu
Mar 12, 2022
Replies
7
Views
3K
Mar 23, 2022
Atmasphere
A
.2 mv cartridge ok with MP-1 V3.1?
Avidlistener
Nov 26, 2021
Replies
6
Views
2K
Nov 29, 2021
microstrip
Improved some parts in my Atma-Sphere M-60/3.3 poweramps
jeffreybehr
Dec 23, 2018
Replies
19
Views
7K
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
6K
Aug 11, 2021
Addicted to hifi
Atma-Sphere Nirvana Amplifiers
Phantom-Audio
Apr 26, 2021
Replies
17
Views
5K
May 19, 2021
Atmasphere
L
What is it about direct heated triodes?
Loheswaran
Oct 6, 2020
Replies
13
Views
5K
Apr 26, 2021
Phantom-Audio
R
Differences Between Chinese and Russia 6AS7 Tubes
rhopkins
May 12, 2010
Replies
15
Views
18K
Apr 26, 2021
Phantom-Audio
C
Anyone hear the MA-3?
caesar
Mar 13, 2011
Replies
17
Views
19K
Feb 8, 2021
Brian Walsh
Atmas M-60 with ZU Druid VI
olivier
Nov 5, 2020
2
Replies
31
Views
7K
Nov 16, 2020
the sound of Tao
O
Atma Model M-60 MkII - The missing 407
Olindian
Oct 19, 2019
Replies
0
Views
2K
Oct 19, 2019
Olindian
O
MA-1 Lumen Reduction for the Red/Yellow Lamps
Mrmb
Aug 27, 2019
Replies
7
Views
3K
Oct 3, 2019
Atmasphere
And now it's the MA-1s in the system and with fewer output tubes
jeffreybehr
Jul 2, 2019
Replies
2
Views
2K
Sep 15, 2019
jeffreybehr
Reinstalled M-60s in the system, driving Serenity Super-7s
jeffreybehr
Mar 8, 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
7K
Dec 16, 2018
jeffreybehr
Atma-Sphere MP-1 Mk 3.3
Brian Walsh
Oct 28, 2015
Replies
12
Views
17K
Oct 6, 2017
ferrox
F
New preamp called the Ultraviolet!
Atmasphere
Jul 21, 2014
Replies
16
Views
22K
Mar 6, 2015
Brian Walsh
New Atma-Sphere amp
Gregadd
Nov 14, 2012
Replies
7
Views
11K
Nov 20, 2012
Atmasphere
Atma-Sphere Cutting Lathe
Gregadd
Aug 30, 2012
2
Replies
32
Views
26K
Sep 10, 2012
MylesBAstor
Last of the cowboys
Gregadd
May 7, 2010
2
Replies
20
Views
18K
Jul 8, 2011
Brian Walsh
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