Atma-Sphere MP-1 Mk 3.3

Brian Walsh

Well-Known Member
Jul 8, 2011
322
11
95
ttsetup.com
#1
Atma-Sphere introduced the Mk 3.3 versions of their products at RMAF a few weeks ago. The MP-1 preamplifier is among them and has captured attention since the upgrades are substantial. The tube complement changed (fewer 6SN7GTs and one more 12AT7 per channel), and the phono section has on the order of 6 dB more gain. On the Atma-Sphere product page it says, "The phono section of the new preamp has more gain and is significantly lower noise than any prior version. In fact it's so quiet that the only way we could achieve the same numbers before was with a Low Output Moving Coil step-up transformer. There is so much more output that the phono is usually at about the same level as many digital sources. The line section is now lower distortion and also has a new shunt-style Gain Trim system that allows for greater control of the gain of the line stage, so high output digital sources are no longer an issue."

Ralph Karsten was showing how with the phono input selected the volume could be turned up to the point the amplifier(s) would clip if the stylus were dropped, yet noise was inaudible. That's a mind boggling improvement.

I anticipate getting my upgraded demo unit back by this weekend and really look forward to it.

Here is a photo of the new MP-1 version control unit. This one (not mine) has the remote volume control option and a V-Cap option. Click on the picture below for the full size image.

8b264a65-9b1c-4b1f-8cb0-6be6782453d5.jpg
 

joeinid

Well-Known Member
Mar 15, 2011
1,540
6
395
NY
#4
Hi Brian,

Can you tell me what retail on the MP-1 mk 3.3 is and what it is with any upgrades? Looks like a superb performer.
 

Brian Walsh

Well-Known Member
Jul 8, 2011
322
11
95
ttsetup.com
#5
Hi Brian,

Can you tell me what retail on the MP-1 mk 3.3 is and what it is with any upgrades? Looks like a superb performer.
Joe, the MP-1 with phono section is $16,200. Popular options include V-Cap copper foil capacitors in the line stage $600 or $1900 throughout, remote volume control $950, and damping package $600.
 
May 30, 2010
16,762
1,594
720
Portugal
#6
Brian,

How can a MP1 mk3 be upgraded to 3.3 if the PCBs and tube sockets are different?
 
May 30, 2010
16,762
1,594
720
Portugal
#8

joeinid

Well-Known Member
Mar 15, 2011
1,540
6
395
NY
#9
Joe, the MP-1 with phono section is $16,200. Popular options include V-Cap copper foil capacitors in the line stage $600 or $1900 throughout, remote volume control $950, and damping package $600.
Thank you so much Brian. I've always thought about Atma-Sphere gear.
 

Brian Walsh

Well-Known Member
Jul 8, 2011
322
11
95
ttsetup.com
#10
Did they shift all the expensive components such as Cadocks and Vcaps?
Ralph can best answer questions about various component locations, if that's what you mean. V-Caps and Caddocks have been available options for quite a while, if that's what you are referring to.

Two 6SN7GTs per channel were deleted and one 12AT7 per channel added, but the locations are similar or identical.

I spoke with Adam (the guy who builds the MP-1 and does amazing work, and a helluva nice guy to boot) last week, and he said they were able to move some of the components on my unit over to the new boards.

Just got off the phone with Ralph, and my preamp is shipping today, so it'll arrive on Saturday. Yippee! :)
 
May 30, 2010
16,762
1,594
720
Portugal
#12
Ralph can best answer questions about various component locations, if that's what you mean. V-Caps and Caddocks have been available options for quite a while, if that's what you are referring to.

Two 6SN7GTs per channel were deleted and one 12AT7 per channel added, but the locations are similar or identical.

I spoke with Adam (the guy who builds the MP-1 and does amazing work, and a helluva nice guy to boot) last week, and he said they were able to move some of the components on my unit over to the new boards.

Just got off the phone with Ralph, and my preamp is shipping today, so it'll arrive on Saturday. Yippee! :)
Thanks Brian, I already got an affirmative answer from Ralph. My MP1 is going to flight again! :)
 

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