The All-New WA7 Fireflies from Woo Audio
Oct 22, 2013 at 8:33 PM Post #496 of 726
  a better upgrade would be the iusb from ifi. The WA7 DAC is powered by the pc's USB bus, so the ifi would remedy that by 'outsourcing' the power to its own low noise power supply.

There's a PSU coming out for the WA7.
Oct 22, 2013 at 8:40 PM Post #497 of 726
  There's a PSU coming out for the WA7.

That won't change the fact that the USB DAC is powered from your PC though. The new PSU is strictly for the AMP portion of the WA7 unless I'm mistaken.
Oct 22, 2013 at 8:41 PM Post #498 of 726
Oct 22, 2013 at 9:25 PM Post #499 of 726
I disconnected the power supply and the DAC still works when switched to D/A so the answer is that the PS only supplies power to the amp section.
  I'm not sure which one it powers, or if its both.

Oct 22, 2013 at 10:37 PM Post #500 of 726

Which is exactly why you will need an external PSU to power the DAC at its best. That or get a better DAC that's isolated from PC power in the first place
Oct 22, 2013 at 11:11 PM Post #501 of 726
So, after almost 3 years on HeadFi, I wrote my first review.  Although it's on the HD800, it's as much about the synergy with the WA7.  The HD800 is so dependant on the source/DAC/Amp that I truly believe that its about the HD800 and the WA7 and what it brings to me.  Here's the review:
Be gentle :)
Oct 25, 2013 at 10:40 PM Post #502 of 726
I been using this to isolate USB power...
works very well and does not require separate power supply.  Is basically just a filter.  Curious to see how it compares to the iusb through a scope but it is pretty reasonably priced and simple.  I also have a couple of the Async DACs with 3mm and optical out. sound great as well and are very reasonably priced considering they are async and have saber dac inside.  would love one of these though with a highest end saber in it and the usb isolator built in.
Oct 25, 2013 at 10:48 PM Post #503 of 726
I am really surprised the WA7 doesn't have a small dedicated power rail for the DAC and isolate it and it's ground already.  If this is true I really think that should be the upgrade.
Nov 11, 2013 at 5:05 PM Post #504 of 726
What do you guys think of the Wa7 and the HE500 pairing? Have the WA7 on the way but that was before I heard the HE6s. Eying the 500s as my next pair of headphones so just wondering if anyone here had any wisdom to share.
Also, what does the rumored new powersupply upgrade improve on?
Dec 24, 2013 at 8:55 PM Post #506 of 726
  i need help im pretty sure my wa7 is broken. When i have it turned on full volume i can hardly hear it. is this a problem with the tubes some thing or software maybe?

Few tests :-

1) Any spare tubes to try? Strange that both would give trouble at the same time
2) Tried using it as an amp only fed by external DAC?
3) Tried using it as a DAC only feeding to an external amp? Both steps (2) & (3) will help to identify if the issue is in the DAC or amp section (somewhat but not fully).
4) Played with the switches at the back?
Dec 30, 2013 at 1:49 PM Post #509 of 726
What dac would be considered an upgrade from the wa7's dac?
I've got the upgrade bug again 


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