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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. olegausany
    Before you had no tubes which deal with power

    Sent from my LG-V500 using Tapatalk
  2. warrenpchi Administrator
    True that.  [​IMG]
  3. Maxx134
    OK I had to be sure before I post, so today I did so let the units idle for a good time and came back to them to listen..

    So now I am certain that with the stock "electro-harmonix" tubes, the unit does not get as hot, as with my Sylvania tubes..

    The wa7 simply does not sound the same after this upgrade with either tube set.
    It sounds so involving now, instead of mainly "presenting" the music clear and clean to you..
    You are more sucked into music on all aspects.
    Normal music becomes more alive and enjoyable.
    Once you have this "openness", there is no going back to stock power supply..
  4. groovyd
    WA7tp sounds great, as they said more open and better instrument and stereo separation only I have a couple problems...
    - The finish on the silver model is a different shiney-ness and texture as to my WA7 so it doesn't really look right next to it. The WA7tp is significantly shinier more metallic with the WA7 being whiter and duller.
    - The WA7 does not stand straight up or match the WA7tp in height.  I never onticed this until now but I think the rubber feet of my WA7 are of a different make then the WA7tp again making it not look right together.  The WA7 actually stands slightly crooked and lower then the WA7tp especially in one corner more then the others.  Not sure if I got a bad set of feet originally?
    Sound is great though but it does take time to warm up.
  5. groovyd
    +1 - it is more lively. def cannot go back to the solid state psu...
    Listening to One Headlight by The Wallflowers at Low-Z volume at 1pm, McIntosh D100 as DAC into my LCD-X is just incredible.  Snare snaps like a real snare to the point I could nearly see the stick slapping down on it, maybe even telling you what model drumstick and snare and the type of wood the shell is made of.  Guitar has hair on it's balls.
    Maxx134 likes this.
  6. JoelT
    Pity. The black WA7tp I have (and am listening to right now), looks identical to my WA7; same height, same finish. I purchased the WA7 earlier this year though, so perhaps there has been a material change within the WA7's production life as well?
    Agreed regarding everyone's early impressions, this really opened up the sound presentation in a very natural and organic way. Beautiful. I'm going to swap the tubes later tonight for kicks. 
  7. olegausany
    Which tubes you have?
  8. EdmontonCanuck
    Have all you early-bird'ers that ordered your WA7tp received your shipment tracking emails? I know for a fact that I ordered ahead of some of you and I've still not received any word, and some of you are already listening to yours!

    Sent from my iPad using Tapatalk HD
  9. JoelT
    A matched pair of Sylvania JAN 5814A/12AU7.
    They were discussed as a comparison tube from some early meet impressions, so I felt that they would be a reasonably affordable, somewhat safe, starting point. 
  10. JoelT
    My shipment notice was sent on Tuesday the 6th. I received the unit this morning. Sorry to hear of your troubles. I assume you've contacted Woo? [​IMG] 
  11. Maxx134
    As far as the silver finish goes.
    I just noticed my units look to have exact same finish on THE FRONT..
    But the sides of my wa7 is flat and so does not have that sparkle that is on the front and top of it,
    While the wa7tp had it on all sides..
    Otherwise for me they are same color..
  12. EdmontonCanuck

    Yeah, I sent a follow up email this morning. Still haven't heard back.

    Sent from my iPad using Tapatalk HD
  13. groovyd
    It's reserve/on-demand power is just stunning now.  I sense absolutely no dip in the stability of the supply even listening to Mr Saxobeat at 3/4 volume which is a pretty demanding song.  Ofcourse this is using LCD-X... haven't switched to T1 which I think might prove or not the capability of this supply.  This supply definitely has more continuous punch then the solid state had.  Bass is much more textured through the punches as well, very clear even through some pretty sweaty stuff that may collapse lesser supplies.
    I only wish it matched my WA7 and that both stood as tall.  WA7 is a good 3-4mm lower then the WA7tp and tilted even lower in one corner.
  14. JoelT
    I was listening to some of John Hopkins Immunity and had the same impression. The amp remained in complete control in even the densest of passages, many of which have very deep and textured bass. Comparatively, the SS supply can sound a bit overwhelmed and edgy. Additionally, I would add that there is absolutely no sense of harshness at the expense of greater spatial separation. In other words, nothing sounds even remotely artificial. It comes across as superbly transparent and smooth...really a wonderful presentation.  
    BTW 3/4 volume? [​IMG] My eardrums would be blown back in to my skull at that level. 
  15. Maxx134
    Can you verify if those Sylvania tubes make the whole unit slightly hotter?
    It is not by much but it is noticeable..

    Anyway I prefer the Sylvania more.
    Another notch higher(!),
    As hard as that is for me to come to terms with.
    It is hard to describe the whole presentation without sounding like hyperbole, but it is a very effortless clear sound like another amp altogether..
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