[ElBartoME]

  Interesting. I think it looks like a Russian tube, but I'm no expert. (Maybe Sovtek?) 
 
Here is another listing from the same seller that I think also looks odd...
 
http://www.ebay.de/itm/RARE-Style-AMPEREX-6DJ8-ECC88-Fat-Pinched-Bottom-VACUUM-TUBE-Cup-Getter-356-/231078581807?pt=Vintage_Electronics_R2&hash=item35cd5b562f&_uhb=1
 
 
 
Interested in other opinions on these tubes. Are you going to contact him about returning it, or are you happy with the sound?

 
I also think that they look like russian tubes. And the Sovtek is really looking similar.
 
http://www.ebay.com/itm/Pair-SOVTEK-6922-Pre-Ampr-Tube-E88CC-ECC88-CCa-6DJ8-/321141640917

 

[Salvatore]

What do you guys think of the Genalex Gold Lion E88CC tube? And how does it compare to the stock 6922EH tubes?

 
http://www.head-fi.org/t/633006/aune-t1-usb-tube-dac-amp-discussion-thread-see-first-post-for-faq/2010#post_9502294
 
I'd go for Amperex 7308. It's the king regardless of headphones. This being said you can probably find cheaper alternatives to match your headphone signature.

 

[xkonfuzed]

http://www.head-fi.org/t/633006/aune-t1-usb-tube-dac-amp-discussion-thread-see-first-post-for-faq/2010#post_9502294

I'd go for Amperex 7308. It's the king regardless of headphones. This being said you can probably find cheaper alternatives to match your headphone signature.

http://www.upscaleaudio.com/amperex-7308-vintage-gold-pin/

There's Driver ($50), Gold ($75) and Platinum grade ($80). I understand that the Platinum has the lowest noise and microphonics, but is there a difference in SQ? And is it worth the extra $30?

 

[jipan]

A user here tried the driver grade and it works fine, if my memory correct.
 
Quote:

http://www.upscaleaudio.com/amperex-7308-vintage-gold-pin/

There's Driver ($50), Gold ($75) and Platinum grade ($80). I understand that the Platinum has the lowest noise and microphonics, but is there a difference in SQ? And is it worth the extra $30?

 
@ ElBartoME & mikoss: yes the pictures in your links looks like my tube. I can't find any HP labeled Amperex which similar with my tube. I think my HP tube is in fact a relabeled sovtek.  Thanks for your helps

 

[isendono]

Yes , driver is fine for Aune T1

 

[hk1388]

I've been lurking this thread for a while. I finally got a different tube (Amperex Orange Globe). Sound stage feels bigger than before. Less bass on my DT990s but it feels tighter. Thanks to everyone who reviewed the different tubes. 

 

 

 

[mikoss]

Nice pictures @hk1388. Glad you're enjoying the OG! Such a great tube. May I also recommend the Voskhod Rocket 6N23P... if you're into the Beyer sound, I think it sounds great for rock. Less refined than the OG, but certainly very musical and raw. The rocket is also super cheap. (around $10 shipped on ebay). Just an unsolicited recommendation

 

[hk1388]

  Nice pictures @hk1388. Glad you're enjoying the OG! Such a great tube. May I also recommend the Voskhod Rocket 6N23P... if you're into the Beyer sound, I think it sounds great for rock. Less refined than the OG, but certainly very musical and raw. The rocket is also super cheap. (around $10 shipped on ebay). Just an unsolicited recommendation

 
Thanks!
 
I looked on ebay. Maybe my search skills are bad but I couldn't find any for less than $20. You have a link to them?

 

[steffinger92]

   
Thanks!
 
I looked on ebay. Maybe my search skills are bad but I couldn't find any for less than $20. You have a link to them?

http://www.ebay.de/itm/6N23P-russ-Zweifachtriode-in-Spanngitterbauweise-Made-in-UdSSR-/251576239291?pt=Röhren&hash=item3a931cc4bb
 
Here's one. With shipping to the US 10$ (7,50€). In used condition but the guy says tested 100%/95%.
A bit funny but this offer isn't listed on ebay.com even if you select location worldwide.

 

[mikoss]

A question for maybe @ElBartoME or @Salvatore or @CoiL or anyone else who might know...
 
Has anyone tried upgrading the op-amps inside of this thing? Would it make much a difference in sound quality?
 
I have never swapped op-amps before, but I heard they are cheap to buy and sometimes easy to swap.
 
As I understand, there are separate op amps; one for the amp (NE5532) and one for the dac (OPA2134)?
 
 
Just asking for information, and maybe possibly to play around. Thanks.

 

[MrEleventy]

I've never messed with SMDs so I don't know the difficulty level of it but, it looks like there's enough room to install a socket so you can hot swap opamps for the dac at least. I don't think there's enough clearance to do the same on the headphone amp board itself. Looks like it'll be a tight fit.

PIC

 

[NCSUZoSo]

Yes you would have to install a socket like MrEleventy suggested in order to install/roll opamps

 

[teb1013]

Yes, I have used the driver grade for the past year. It works perfectly for the tube buffer application of the Aune T1. I wouldn't spend the extra for gold or platinum.

 

[jipan]

RTC labeled Amperex PCC189 is good! Extended but smooth and relaxed treble, smooth vocals (not raw like Phillips PCC88) and laid back presentation. Vocals not as up-front and raw as Phillips PCC88, RTC PCC189 more laid-back. Details is good, worse than Phillips PCC88 but better than HP labeled Sovtek. Less holographic than Phillips PCC88 but again, better than Sovtek. This tube is like middle-ground between Sovtek and Phillips PCC88.

 

[desmond0123]

i have a question,can i use 6n1p tube with the aune t1? cause i have a 6n1p tube when i put it in and play music,there is a cracking sound so i am wondering what is the problem?