[maro65]

First Gen, with Jupiter Copper caps

I'm talking about the second generation ,they're not the same

 

[davehg]

Good to know. One other idea, albeit pricey. I’ve heard a few folks use the Audioquest Niagra 1000 or 1200 AC conditioner who have said it eliminated hum in their tube amp, plus yielded sonic benefit. They are on back order and are pricey. I am going to try one for my Leben, whose transformers hum too (not through the loudspeakers though). I’ll let you know if it works. Have you tried a grounding strap on the Woo to see if that helps?

 

[maro65]

Good to know. One other idea, albeit pricey. I’ve heard a few folks use the Audioquest Niagra 1000 or 1200 AC conditioner who have said it eliminated hum in their tube amp, plus yielded sonic benefit. They are on back order and are pricey. I am going to try one for my Leben, whose transformers hum too (not through the loudspeakers though). I’ll let you know if it works. Have you tried a grounding strap on the Woo to see if that helps?

I did a lot of evidence, and I sold it

 

[lawshredpower]

Good to know. One other idea, albeit pricey. I’ve heard a few folks use the Audioquest Niagra 1000 or 1200 AC conditioner who have said it eliminated hum in their tube amp, plus yielded sonic benefit. They are on back order and are pricey. I am going to try one for my Leben, whose transformers hum too (not through the loudspeakers though). I’ll let you know if it works. Have you tried a grounding strap on the Woo to see if that helps?

So, transformer hum may be dc on the mains. Maybe you don't need something that expensive to solve it.

You could buy the new iFi DC Blocker for what? 150? Buy it on amazon, test it, share your findings with me (please ) and if it does not work you can always return. https://ifi-audio.com/products/dc-blocker/


Now regarding the WA22, I've stated before I'm on a quest to achieve pitch black background. Nothing indicates that the hum I'm experiencing is DC on the mains, as the transformers do not hum. Take a look at my most recent thoughts here and tell me what you think https://www.head-fi.org/threads/woo-audio-wa22-amp-owner-unite.826386/page-75#post-16299780

 

[lawshredpower]

Another zero hum quest update:


Added brand new PSVANE UK-6SN7 tubes, replacing my NOS Sylvania VT-99. Hum has diminished considerably. The lowest I’ve ever achieved. Almost nothing with my IEMs. If I had really hard to drive full-size headphones perhaps it would be already pitch black.

Yeah, digging NOS tubes on eBay has been very hit and miss. I can tell which part of the hum was caused by the VT-99s by listening what the PSVANE added and removed noise-wise, if that makes any sense. And I have a feeling putting some brand new good power tubes might finally kill all hum. I’m currently sporting a matched quad of NOS GE 6BL7GTA.

 

[davehg]

Trying out an NOS set of Sylvania 6SN7W (military spec). Sounds awesome with the Brimar/Mullard combo.

 

[Zurv]

How is the WA22 as a pre?
I'm moving my Primaluna EVO 400 to my floor standing speakers. It was a pre/amp and headphone amp.
I have some extra SS amps around.. so maybe the Woo fills the roll of headphone amp and pre?

Thoughts?

 

[Randy Myers]

Hello All, I just recently purchase my Woo WA22 (2nd Gen) to drive my Abyss Diana Phi's and Audeze LCD-3's. So far loving it but trying to decide if I should look into upgraded tubes.

 

[jonathan c]

Hello All, I just recently purchase my Woo WA22 (2nd Gen) to drive my Abyss Diana Phi's and Audeze LCD-3's. So far loving it but trying to decide if I should look into upgraded tubes.

If you travel the upgrade route, start with the rectifier tube. I suggest as serious, but not insanely priced, contenders: Brimar 5R4GY, Mullard GZ34. [I use these in the Woo WA6 (1st generation).]

 

[Randy Myers]

Thank you for the recommendation. Any good source for this tube?

 

[jonathan c]

Thank you for the recommendation. Any good source for this tube?

I have purchased via EBay and I have used Langrex in the U.K.

 

[Randy Myers]

Thank you for the suggestions. I have a feeling I will try a few different ones. To start I decided to grab a JAN Phillips NOS rectifier and a set of Black Treasure 6SN7's which I have used in other pieces and really liked.

Always appreciate the thoughts and suggestions. I have a feeling I will end up with a few to switch in and out .

 

[lawshredpower]

Hello All, I just recently purchase my Woo WA22 (2nd Gen) to drive my Abyss Diana Phi's and Audeze LCD-3's. So far loving it but trying to decide if I should look into upgraded tubes.

Absolutely! Stock tubes are consistently bad and inconsistent on everything else.

 

[Zurv]

It always makes me sad when i buy tube devices just to throw away all the stock tubes. They cost something.. maybe let me buy it without tubes.

 

[spyder1]

It always makes me sad when i buy tube devices just to throw away all the stock tubes. They cost something.. maybe let me buy it without tubes.

Don't through away stock tubes! Set them aside as spares, or include them when you decide to sell your AMP.