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Aune T1 USB Tube DAC+Amp Discussion Thread ***See first post for FAQ*** - Page 179

post #2671 of 5877
Thread Starter 
Quote:
Originally Posted by stjj89 View Post

Does anyone have a recommendation for a bassy tube? I've got a Amperex 7308 in my Aune T1 now and they sound awesome on my HE-400, but I'm looking for even more (and deeper) bass extension and impact with these cans for genres like EDM. I've also got an EH6922 but the bass on that doesn't even extend as deep as the Amperex. From reading this thread, it seems the Genalex Gold Lion and Vokshod 6N23P Rocket Logo are good bets. Anyone have any opinions on this, or other recommendations?
Rocket logo is not the best for bass extension, the Russian 6n23p-eb is. Easily. PM me if you want to try it.
Edited by joeq70 - 8/15/13 at 12:01am
post #2672 of 5877
Quote:
Originally Posted by penmarker View Post

Hey! Just want to ask how you're doing with the channel imbalance?

My friend who bought the unit from me returned it saying it has some problems with the DAC, but not the channel imbalance (I made it clear to him), but I'm using it now it's running fine. Guess I have to repair it anyways.

Actually i'm just listening to it as is. The channel imbalance is noticeable only at low volumes; in that case (rare case, because i usually listen to music at medium, sometimes high, volumes) i go to  control panel -> hardware and sounds -> Audio, then click on the Aune T1 and press the properties button; there i lower the left channel volume to match the right one (on windows, in linux distributions it is even easier).

I thought about replacing it but it would have cost over 40 € so i preferred to buy some new tubes.


Edited by Inevitability - 8/15/13 at 4:10am
post #2673 of 5877
I have been running my T1 with Sennheiser HD 558s at 0 gain since I got it. Sounds great, but I had to turn up to over 50% to get adequate volume with many music sources. Following through on some entries on this thread, I have recently changed to +10. I was surprised to find that, as well as having to use much less volume, the music sounds more immersive, with a larger soundstage and more punch in the bass. +10 is as far as I can push this with the 558s, but I think that I will use this setting from now on, with possible checks at 0 to compare. The Amperex 7308 is still my go to tube, for just about everything.
post #2674 of 5877
Quote:
Originally Posted by Inevitability View Post

Actually i'm just listening to it as is. The channel imbalance is noticeable only at low volumes; in that case (rare case, because i usually listen to music at medium, sometimes high, volumes) i go to  control panel -> hardware and sounds -> Audio, then click on the Aune T1 and press the properties button; there i lower the left channel volume to match the right one (on windows, in linux distributions it is even easier).

I thought about replacing it but it would have cost over 40 € so i preferred to buy some new tubes.

You did the exact same thing I did. Haha. beyersmile.png

post #2675 of 5877

I`m wondering what`s causing this imbalance? Maybe it`s "typical" design flaw or something easy that someone could sort out and those who have problems could fix it?

Just being clear - I don`t have this problem with my unit.

post #2676 of 5877
It's most likely the volume pot (the knob). All analog pots suffer from channel imbalance at low levels and depending on the quality of the pot, the degree of it varies. All the dacs/amps that I've owned that had a analog volume knob suffers from it at low levels. It's a common occurance.
post #2677 of 5877
Quote:
Originally Posted by MrEleventy View Post

It's most likely the volume pot (the knob). All analog pots suffer from channel imbalance at low levels and depending on the quality of the pot, the degree of it varies. All the dacs/amps that I've owned that had a analog volume knob suffers from it at low levels. It's a common occurance.

I understand the imbalance at low levels, this channel imbalance is on all levels. There is something defective in the DAC/tube buffer portion of the unit. I've replaced the tube but no dice.

post #2678 of 5877
Quote:
Originally Posted by MrEleventy View Post

It's most likely the volume pot (the knob). All analog pots suffer from channel imbalance at low levels and depending on the quality of the pot, the degree of it varies. All the dacs/amps that I've owned that had a analog volume knob suffers from it at low levels. It's a common occurance.

 

Quote:
Originally Posted by CoiL View Post

I`m wondering what`s causing this imbalance? Maybe it`s "typical" design flaw or something easy that someone could sort out and those who have problems could fix it?

Just being clear - I don`t have this problem with my unit.

 

I sent an email to Aune and they told me it is normal: it depends on potentiometer.

post #2679 of 5877
Quote:
Originally Posted by penmarker View Post

I understand the imbalance at low levels, this channel imbalance is on all levels. There is something defective in the DAC/tube buffer portion of the unit. I've replaced the tube but no dice.
Well then, there's something totally wrong with that then. Mine is slight and only if I use IEMs.
post #2680 of 5877
Quote:
Originally Posted by Inevitability View Post

 

I sent an email to Aune and they told me it is normal: it depends on potentiometer.

Ok, since I`m bored sometimes, maybe going to change that potentiometer with more quality part :)

post #2681 of 5877
Quote:
Originally Posted by CoiL View Post

Ok, since I`m bored sometimes, maybe going to change that potentiometer with more quality part smily_headphones1.gif

Haha! I was totally thinking about doing the same thing!
post #2682 of 5877
Quote:
Originally Posted by teb1013 View Post

I have been running my T1 with Sennheiser HD 558s at 0 gain since I got it. Sounds great, but I had to turn up to over 50% to get adequate volume with many music sources. Following through on some entries on this thread, I have recently changed to +10. I was surprised to find that, as well as having to use much less volume, the music sounds more immersive, with a larger soundstage and more punch in the bass. +10 is as far as I can push this with the 558s, but I think that I will use this setting from now on, with possible checks at 0 to compare. The Amperex 7308 is still my go to tube, for just about everything.

 

Interesting. Maybe I should play more with the gain settings.

post #2683 of 5877

What bores me more is the LED under the tube. At first i liked it but now i find it annoying because it hides the tube own light (that i like more). Sooner or later i will remove it.

 

Anyway the Siemens PCC189 i bought last sunday has not been shipped yet angry_face.gif

post #2684 of 5877

Patience with eBay deals. It might just be unmarked as shipped. I had many cases like this but everything was ok :)

About LED, I`m thinking just putting tiny orange see-through plastic piece in the middle of socket so it will give same glow as tube.

post #2685 of 5877
Quote:
Originally Posted by CoiL View Post

Patience with eBay deals. It might just be unmarked as shipped. I had many cases like this but everything was ok :)

About LED, I`m thinking just putting tiny orange see-through plastic piece in the middle of socket so it will give same glow as tube.

NIce idea about the LED. Anyway i contacted the ebay seller and he actually hasn't shipped the tube yet. He said he would have done it today.

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