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Maverick Audio TubeMagic D1 (DAC/Amp) - Condensed FAQ and Info Thread - Page 44

post #646 of 727

I agree, opamps don't make much difference in msot cases  but the default opamps on the d1 give you highs that pierce your ears more than the 4562.  Besides that no change in sound signature.

 

 

post #647 of 727
Thread Starter 

It has certainly surprised me how close in sound quality the D2 and NFB-12 are, being that the NFB-12 has discrete circuits. It could just be my usage (more games and HD video than FLAC music) or my setup (middle of the road vintage setup) but that's really how I feel. IMO, the features between the two make more of a difference. BNC input, front panel power button, tube output on the D2 and headphone amp on the NFB-12. It's really hard to choose. I really think that in order to hear differences or have the D2 be the limiting piece in your setup, you must have over $800-$1k of equipment after the D2.

post #648 of 727

Depends on what kind of signature you want, the NFB-12 is undoubtedly on the warmer side of reaching neutrality.

post #649 of 727

A quick note to those interested in some impressions about the D2, I have added a post to the existing D2-specific thread:

http://www.head-fi.org/t/578557/maverick-audio-dac-d2#post_8178213

post #650 of 727
I rolled in a lm4562 to the headphone side. Didn't like it at all:mad: Harsh highs, lack of detail seemed that everything was compressed. Put the original back in and all is well.
post #651 of 727

So far I haven't seen anyone have this issue but sorry if this is a repost

 

On my D1 I'm getting alot of noise that's being output through the SS line-out and tube pre-amped line out. However, it only happens when I'm feeding a 24/96 signal through optical.

 

Has anyone else had this issue? It's a real bummer because its super noticeable, especially with 24/96 vinyl rips since I have to up the volume on my amplifier.

post #652 of 727

Today I replaced both stock opamps with LT1364CN8. Noticeable upgrade! Sounds much clearer and has a punchier bass that makes me love my DT770Pros again, as opposed to preferring brighter headphones with the D1.

 

FunyunBreath, I had similar problems with 24/96 + stock opamps that now seem to be gone. I'd get noise at even moderate sound levels with 96k, but now I can crank it to 100% and hear only a faint white noise that seems normal. Might be worth trying as they're not very expensive opamps, and it's an easy mod.

post #653 of 727

 

Quote:
Originally Posted by alien3456 View Post

Today I replaced both stock opamps with LT1364CN8. Noticeable upgrade! Sounds much clearer and has a punchier bass that makes me love my DT770Pros again, as opposed to preferring brighter headphones with the D1.

 

FunyunBreath, I had similar problems with 24/96 + stock opamps that now seem to be gone. I'd get noise at even moderate sound levels with 96k, but now I can crank it to 100% and hear only a faint white noise that seems normal. Might be worth trying as they're not very expensive opamps, and it's an easy mod.

 

You replaced both opamps with the LT1364?

 

I have the LT1364 and LM4562 in mine

post #654 of 727
Quote:
Originally Posted by _Spanky_ View Post

It has certainly surprised me how close in sound quality the D2 and NFB-12 are, being that the NFB-12 has discrete circuits. It could just be my usage (more games and HD video than FLAC music) or my setup (middle of the road vintage setup) but that's really how I feel. IMO, the features between the two make more of a difference. BNC input, front panel power button, tube output on the D2 and headphone amp on the NFB-12. It's really hard to choose. I really think that in order to hear differences or have the D2 be the limiting piece in your setup, you must have over $800-$1k of equipment after the D2.

So how would the D2 pair with the GS-1?  It's in the price range above.

post #655 of 727

Hi All, I have been using the D1 for years now and I have had many false starts with swapping op amps and tubes.  We are finally settled in our new house and new jobs so I am back at it.  The issue for me is....I don't know what you all are talking about half the time.  I am a builder and don't really understand the terminology.  SO, I'd like to order a set of the different opamps and will be placing an order at Mouser tomorrow for all the bits I need to finish my GM70 amp.  Can someone tell me what opamps and how many to order???

 

Also, are the different opamps used for the SS pre  AND the DAC?  I've read the FAQs and still don't understand it.  Thanks a lot for all your help.  Cheers, Dennis.

post #656 of 727

The DAC has a chip to the tube pre-out (The chip closest to the tube). the opamp for the head phone out is its own . (labelled u6 on the board).


Anyone here using the LT1364 chip have issues with channels? I put mine in and i have to put my D1 at max to get a sound out of it and it is only one channel. Is it defective?

post #657 of 727

Possibly defective or a mono chip.
 

The D1 w/ LM49720 in the HPA is plenty good to me.  I found that all discrete OPA's including the A-GD Sun rather suck in it.

 

D1 as dac only output to a separate amp is a better upgrade than anything minor you can make.  I mean the dac is not bad at all~  Of course if you compare it head to head with something more expensive(for example the NFB-3/2 or I would even assume the maverick D2 which I have not heard before) its flaws become apparent(noise floor bleeding into audible spectrum for instance).

 

This is without the tube output which I never actually utilized.


Edited by ninjikiran - 6/28/12 at 12:53pm
post #658 of 727

I am looking to upgrade my Mav-audio TubeMagic D1. I am a new user to this forum but I was hoping someone might be able to make some general recommendations for the best all-around upgrades I can do. I figure I can probably get more bang for my buck by upgrading the OpAmps rather than upgrading to the D2, especially since I'm already quite happy with the D1. I've found that the highs are somewhat too shrill for my taste and the lows are too bloated and loud when using the optical out from an auztentech prelude, and connecting krk active monitors + krk sub directly to the D1. I've browsed through many pages of this thread but I can't possibly read through all of it, so perhaps someone could summarize, or perhaps link me to a page in this thread that does - the front page "condensed" thread doesn't really identify the "best" upgrade, though I suppose there is a degree of personal preference involved here. 

 

They are now selling the OPA 627 mod on the mav-audio site, and according to an email exchange I had with their tech support, Ryan, he suggested that their testing indicated this was the best upgrade. What do you think? I've seen many posts suggesting that this Sun HDAM thing may be a better upgrade, and I went through a few posts that talked about the "skyline" mod. I would be up for doing the mod myself I think...though the audio-gd website is a total disaster and it's not clear how to order one.

post #659 of 727
Quote:
Originally Posted by apollo7157 View Post

I am looking to upgrade my Mav-audio TubeMagic D1. I am a new user to this forum but I was hoping someone might be able to make some general recommendations for the best all-around upgrades I can do. I figure I can probably get more bang for my buck by upgrading the OpAmps rather than upgrading to the D2, especially since I'm already quite happy with the D1. I've found that the highs are somewhat too shrill for my taste and the lows are too bloated and loud when using the optical out from an auztentech prelude, and connecting krk active monitors + krk sub directly to the D1. I've browsed through many pages of this thread but I can't possibly read through all of it, so perhaps someone could summarize, or perhaps link me to a page in this thread that does - the front page "condensed" thread doesn't really identify the "best" upgrade, though I suppose there is a degree of personal preference involved here. 

 

They are now selling the OPA 627 mod on the mav-audio site, and according to an email exchange I had with their tech support, Ryan, he suggested that their testing indicated this was the best upgrade. What do you think? I've seen many posts suggesting that this Sun HDAM thing may be a better upgrade, and I went through a few posts that talked about the "skyline" mod. I would be up for doing the mod myself I think...though the audio-gd website is a total disaster and it's not clear how to order one.

In order to order the SUN HDAM. Basically you e-mail him your order. Then you will get a email back with his paypal info.
Also, I would recommend looking up on eBay to get some DIP-8 sockets to raise the DAC slot or the headphone opamp slot.

http://www.ebay.com/itm/180686218449?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649#ht_2782wt_1254 something like these.
the Sun HDAM does not clear the height of the capactiors. They also sit taller than the case.

I used a LME49720 chip before I got the HDAM. I quite liked it and was a stand in until I had the cash for the HDAM.

 

My current setup is the Western Electric 396A tube. This is an amazing tube for the D1. It has a deeper background sound, great sound staging and brings the lower freqneucy sounds out. I then paired it with my SUN HDAM' and WOW. My speakers sound super amaizng now and even more superb ever since I got my JBL's hooked up again.

Audio is extermely subjective. The reason why there is no best upgrade is because there is none. It would really throw off decision making because they are all slightly different but a combination always stands out.

I highly recommend the 396A tube and the SUN HDAM for the D1. Massive improvement and the clarity is gorgeous.

 

post #660 of 727
Quote:
Originally Posted by Shroker View Post

In order to order the SUN HDAM. Basically you e-mail him your order. Then you will get a email back with his paypal info.
Also, I would recommend looking up on eBay to get some DIP-8 sockets to raise the DAC slot or the headphone opamp slot.

http://www.ebay.com/itm/180686218449?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649#ht_2782wt_1254 something like these.
the Sun HDAM does not clear the height of the capactiors. They also sit taller than the case.

I used a LME49720 chip before I got the HDAM. I quite liked it and was a stand in until I had the cash for the HDAM.

 

My current setup is the Western Electric 396A tube. This is an amazing tube for the D1. It has a deeper background sound, great sound staging and brings the lower freqneucy sounds out. I then paired it with my SUN HDAM' and WOW. My speakers sound super amaizng now and even more superb ever since I got my JBL's hooked up again.

Audio is extermely subjective. The reason why there is no best upgrade is because there is none. It would really throw off decision making because they are all slightly different but a combination always stands out.

I highly recommend the 396A tube and the SUN HDAM for the D1. Massive improvement and the clarity is gorgeous.

 

Thanks Shroker - this is really helpful. Any idea how the Western Electric 396A compares to the GE5670W? When I got my D1 I opted for the tube upgrade at the time...Also what is the difference between the single and dual OpAMP? They list both as options here http://audio-gd.com/Pro/diy/OPA/OPAEN.htm


Edited by apollo7157 - 8/17/12 at 2:09pm
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