XDuoo TA-30 tube dac/amp headphone from Apos

K3RMIT

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Sep 4, 2020
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yea tube rolling gets nuts fast. But if you want the most of tube audio it’s part of it. but for it’s part of the fun.
 
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Gregadd

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I decided to postpone tube rolling for the moment
I just am completely satisfied with the sound at the moment. I will just wait to get an urge to scratch that itch.
 
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Gregadd

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Dh Labs Power plus power cord. I ownd this before. Circa $270 depending on length.
 

Gregadd

WBF Founding Member
Apr 20, 2010
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So this might be a good time to reconsider tube rolling. I suspect a defective tube on the left channel. It still sounds great.
 

Gregadd

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Apr 20, 2010
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20220418_012124.jpg
 

AMR / iFi audio

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Aug 21, 2019
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So this might be a good time to reconsider tube rolling. I suspect a defective tube on the left channel. It still sounds great.

@Gregadd I might be able to give you some pointers on tube rolling :) While 12AU7/ECC82 is basically self-explanatory, there is more than meets the eye about the rectifier tube. Stock, it's a 5Z3P. Not a popular tube, isn't it? Well, you can use any 5U4G and there is plenty of them on the market. Enjoy!
 
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Gregadd

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Apr 20, 2010
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20220427_221809.jpg
 

Gregadd

WBF Founding Member
Apr 20, 2010
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Metro DC
Very astute. They are new. At some point I may get nos and compare them.
20220430_163209.jpg
Definitely nos from Tube Depot.
 

AMR / iFi audio

Industry Expert
Aug 21, 2019
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Very astute. They are new. At some point I may get nos and compare them.
View attachment 92279
Definitely nos from Tube Depot.
Thanks :) RCA made one of the top tubes back in the day, congratulations on your purchase! Have you tried it yet? How do you rate this upgrade?
One of the best NOS tubes to start with are Phillips SQ. They sound great and are still available at reasonable prices.
 

Gregadd

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Apr 20, 2010
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Ok so the RCA was doa. The dealer will replace free of charge.
The Mullard is breaking in. I definitely have midrange magic.
 

AMR / iFi audio

Industry Expert
Aug 21, 2019
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Ok so the RCA was doa. The dealer will replace free of charge.
The Mullard is breaking in. I definitely have midrange magic.
Glad to hear that they did that. Mullard is well known for warm, analogue sound, I see that the new production retained that signature. Is that what you were looking for?
 

Gregadd

WBF Founding Member
Apr 20, 2010
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Teplacement tube arrived yesterday.
 

Gregadd

WBF Founding Member
Apr 20, 2010
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Metro DC
Saw a video that says tubes are back lighted. It is not the tube that has gone bad. It is the back lighting
 

Gregadd

WBF Founding Member
Apr 20, 2010
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Metro DC
As of this moment I am loving the Mullard.
 

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