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Woo Audio WA7TP (tube power supply) Impressions Thread

Discussion in 'Headphone Amps (full-size)' started by warrenpchi, Apr 20, 2014.
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  1. abvolt
    good explanation ..
     
  2. JoeDoe
    Had to read this three times in a row, but I think your explanation makes sense. :) Thanks!
     
  3. groovyd
    One of the big differences is in the internal resistance of the power supply as seen by the amp.  Simply by how much does the voltage drop depending on the amount of current being demanded.  A good power supply has a very low output resistance and will output the same voltage regardless of the demand.  Another aspect is much like what was mentioned regarding the amount of ripple in the voltage provided.  A good power supply has no ripple which would translate into a proportional ripple in the output signal of the amplifier depending on how well the amplifier tolerates ripple.  In these sort of no feedback architecture amplifiers ripple is hard to correct for so it is worth beefing up the power supply and filtering to reduce ripple from the get go. We can only assume the choice of tubes in the power supply plays a big role in determining these two qualities.
     
  4. JoeDoe
    Let's do this:
     
    photo.jpg
     
    Jeb Listens likes this.
  5. groovyd
    Plugged in the Sylvania 6350's to my work rig and woop!  Sounds great was easy to hear a difference immediately.  Bit more instrument separation, extended clearer highs and tighter bass.  All around a more cohesive authoritative sound.
     
  6. Jeb Listens
    @groovyd  - exciting stuff, sounds like the 6350s could be a winner.   Head-Fi salutes those pushing the boundaries with extreme tube-rolling.  
     
    Are the adapters decent quality ?  
     
    As a great man here once said... "Pictures or it didn't happen".....   [​IMG] 
     
  7. Dogmatrix

    Great to hear you took the plunge with positive results .
    Now we just need to work out if the GE , Sylvania and RCA versions are any different
    Come on Jeb Listens you're next
    As far as the adapters are concerned they seem very well made certainly feel solid , hard to tell what is going on inside
    I have three different sets from the same people and they all work flawlessly so I would recommend
     
  8. JoeDoe
    Just plugged in the EH Gold Pins for the first time last night. 
     
    [​IMG]
     
    I don't remember the last time a tube upgrade created such a sonic improvement!
     
     
    This little cube continues to impress... I was on the fence about whether taking the plunge on this guy would be a worthwhile upgrade over my beloved Pan Am, but every time I listen, I feel better and better about the decision!
     
     
    Now if only I could find a buyer for the Pan Am...
     
  9. groovyd
    The Sylvania I got are very nice, totally NOS never used perfect condition. Sound great.  You'll have to send me yours to A/B :wink:
     
  10. JoeDoe
    New tubes!

    NOS Sylvania JHS-6189

    NOS GE 5 star JG5814a

    Anyone have any experience with either of these?

    EDIT: Figured I'd go ahead and post my impressions:



    These GE's are no joke! Coming from the Sylvanias, they have a better all-round low end - more quantity, better quality, and lower reach. Haven't noticed as much difference in the midrange and treble, but I've only had 'em in for 10 minutes. Will post more thoughts later on!
     
  11. JoeDoe
    To follow up:
     
    GE 5-star: 8/10 - More midrange/treble oriented than the Sylvania. Because the upper end is a little more refined, I feel like the soundstage and 3D-ness is better. Very clean overall with a more linear low end than the Syl.
     
    Sylvania: 8/10 - A little warmer with a bit more thump than the GE. Upper end isn't quite as clear, but bass guitar and kick drums are more fun, so I suppose it's a trade off.
     
  12. lnyp75
    Would you guys recommend the WA7 for the LCD-3's? I recently purchased a pair at a great cost, so as this came unexpected I'm now looking for a decent amp/dac at this price range.
     
  13. abvolt
    I don't own the lcd3's but have lcd2's and owned the wa7/tp for about a year and they sounded just great together.. 
     
  14. groovyd
    yes i own 2 sets of WA7/tp and 2 sets of LCD-X/XC and the pairing is great
     
  15. bflat

    Need some extra tubes? LOL
     
    I thought about doing the same especially with some nicely priced WA7 in classified. I decided to get a Schiit Mjolnir 2 instead for my home amp. My WA7 will be heading to my office. I find myself listening more at work lately. Now I have a full balanced at home and full SE at my office. I also thought about a WA22, but it won't fit in my home setup.
     
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