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Eastern Electric Minimax Tube Dac (32-bit dac) - Page 73

post #1081 of 1140

Yes.  I think that's how I see it in mine.  For what I understand, gain has to be configured on the CCS Kit before installing it and following the polarity.

ddc2f1d9-1-1.jpg


Edited by levir - 5/23/12 at 5:06am
post #1082 of 1140
Quote:
Originally Posted by levir View Post

Yes.  I think that's how I see it in mine.  For what I understand, gain has to be configured on the CCS Kit before installing it and following the polarity.

ddc2f1d9-1-1.jpg

I finally got around to assembling the kits. Mine came with 1K trimpots(2.5mA to 100mA).

I'm not sure if this is OK or what adjustments I'm supposed to make before installing/powering up. I'm waiting for further directions before proceeding.

post #1083 of 1140

Hey T&C,

 

I was told that you set the CCS Kit gain to @0.85mv across the 10ohm resistor or until the sound has no distortion.

post #1084 of 1140

Installed the CCS. First impressions are a more open sound as if the tube had a bigger set of lungs. A tad more gain but nothing to worry about. A couple of inline attenuators on the RCA outputs did the trick but weren't really necessary.

Once again a small but worthwhile improvement and probably the last piece of the MM mod puzzle - at least until summer is over and/or someone shows me how to change the surface mount regs that feed the DAC chip.

But to be honest I really don't feel like pulling the board out again. It's sounding great as is and I've beaten the odds so far as far as messing something up goes so maybe better to not push my luck any further.

post #1085 of 1140

You guy's are playing with fire, with these final mods, You can blow (fry) a Dac in a heart beat....... Even with some "body" static...... be careful for what little bit of improvement you think you hear.......JMO

post #1086 of 1140
Quote:
Originally Posted by Turn&cough View Post

Installed the CCS. First impressions are a more open sound as if the tube had a bigger set of lungs. A tad more gain but nothing to worry about. A couple of inline attenuators on the RCA outputs did the trick but weren't really necessary.

Once again a small but worthwhile improvement and probably the last piece of the MM mod puzzle - at least until summer is over and/or someone shows me how to change the surface mount regs that feed the DAC chip.

But to be honest I really don't feel like pulling the board out again. It's sounding great as is and I've beaten the odds so far as far as messing something up goes so maybe better to not push my luck any further.

 

Thanks T&C for your initial impressions.  You give it time to break-in and the CCS sound will open up more.  I actually loved the increased gain + including the dynamics.  

 

I am going to try to implement the Belleson regulators that you currently have.

 

Be well.

post #1087 of 1140

Big thanks to "AVU" for the tube advice.

 

I've settled on an E80CC labeled Amperex PQ. No more tube hunting for me, it's a keeper.

 

Now I'm comparing my Bursons with some NewclassD DEXA opamps.

 

They are completely different. The Bursons are full bodied and very analogue. DEXA's are lean and clean.

 

I'm really impressed with the DEXA / E80CC combo. It has warmth but also clarity and extension. And the sound stage is almost too big, if there's such a thing.

 

I'm about to migrate all this over to a Minimax Plus. So I'll do my best to rate the differences between the two DACs.

 

What recession?

post #1088 of 1140

Glad to hear it!  biggrin.gif

The Amperex PQ is phenomenal. I'm intrigued by the DEXA opamps though - you make them sound like a great match.  Might have to look into a pair... wink_face.gif

 

In fact, didn't someone have a pair they didn't like?  If anyone's willing to part with theirs, PM me.  I'd like to try them out!  

 

Quote:
Originally Posted by ecapsretliab View Post

Big thanks to "AVU" for the tube advice.

 

I've settled on an E80CC labeled Amperex PQ. No more tube hunting for me, it's a keeper.

 

Now I'm comparing my Bursons with some NewclassD DEXA opamps.

 

They are completely different. The Bursons are full bodied and very analogue. DEXA's are lean and clean.

 

I'm really impressed with the DEXA / E80CC combo. It has warmth but also clarity and extension. And the sound stage is almost too big, if there's such a thing.

 

I'm about to migrate all this over to a Minimax Plus. So I'll do my best to rate the differences between the two DACs.

 

What recession?


Edited by AVU - 6/13/12 at 7:01pm
post #1089 of 1140

Just to throw in my 2 cents, the Amperex/Philips really is a great tubey/forgiving valve. Between the Tungsram and Amperex, I couldn't decide which I liked more.

post #1090 of 1140

Minimax is discontiniued?

post #1091 of 1140

Yes, you need to buy secondhand, or grab the updated "Plus" version.
 

post #1092 of 1140

Just swapped in some LME49990 opamps into the Plus into U1/U2/U6/U7, running solid state with the tube removed, and I am really impressed with the improvement. There is (to me, at least) a really improved sense of dynamics and punchiness, as well as an increase in detail, particularly noticeable in background vocals. Back to listening for me!

post #1093 of 1140
Quote:
Originally Posted by ecapsretliab View Post

Big thanks to "AVU" for the tube advice.

 

I've settled on an E80CC labeled Amperex PQ. No more tube hunting for me, it's a keeper.

 

Now I'm comparing my Bursons with some NewclassD DEXA opamps.

 

They are completely different. The Bursons are full bodied and very analogue. DEXA's are lean and clean.

 

I'm really impressed with the DEXA / E80CC combo. It has warmth but also clarity and extension. And the sound stage is almost too big, if there's such a thing.

 

I'm about to migrate all this over to a Minimax Plus. So I'll do my best to rate the differences between the two DACs.

 

What recession?

What other opamps apart from the stock have you tried in your mini max?  Have you tried others such as the LME or the ADI?

post #1094 of 1140
Quote:
Originally Posted by ecohifi View Post

What other opamps apart from the stock have you tried in your mini max?  Have you tried others such as the LME or the ADI?


Just the AD797, which I liked a lot. For memory it was similar to the Burson Discretes but less thick sounding.

 

I think the Bursons are unique, they add weight. But in my system I have a mid bass hump, so they could sound a bit congested in the mid/upper bass.

 

Sorry I don't have much experience with other IC's.

post #1095 of 1140
Quote:
Originally Posted by ecapsretliab View Post


Just the AD797, which I liked a lot. For memory it was similar to the Burson Discretes but less thick sounding.

 

I think the Bursons are unique, they add weight. But in my system I have a mid bass hump, so they could sound a bit congested in the mid/upper bass.

 

Sorry I don't have much experience with other IC's.

It be interesting for you to compare the Burson and Dexa to the LME 49720/49860,  these will cost you a fraction of what the Dexa and I am interested in someone to compare them!

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