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Upgraded Woo Audio 6? - Page 5

post #61 of 187
thanks for the additional insights jamato8...it seems like there's
no real end to the variations and schemes of the pathway modifications
available...i suppose the real secret is finding the sweet spot at
which the laws of diminishing returns sets in, and stopping...

hey, 3rdrock, you and several others got me rolling with these mods...i'm
finding the sound vastly improved after several hours now...it's much more
significant than rolling tubes...and yeah, glad you didn't fall for that scam...
btw, the metal tube i did receive was better than the seller described...
genuine NOS with 64/64 on a calibrated tv7...
post #62 of 187
Hi all. Just pondering over the WA6 product page, and was wondering if you guys would agree on the sequence/priority of the upgrades as listed. Also, is it worth only doing the first one, or maybe two, upgrade; or do all need to be done to get the full effect?

In case you need, here is the ordered list

1. V-Cap for stage coupling: Teflon film and tin foil reference capacitor. Matched pair 0.15uf/600V. $120

2. Blackgate capacitors for voltage filering. Power Tank 220uf/200V, 2 pieces. $110

3. Blackgate capacitors for decoupling 150uf/350V, 2 pieces. $70

4. Blackgate capacitors for by-pass. 220uf/16V, 4 pieces $30.

EDIT....also after reading various threads about the tubes, am I correct in the following conclusions (rectifier related):
- Amperex Bugle Boy (GZ34) and GZ32 (e.g. Mullard, Brimar, Sylvania) provide more warmth; more of that tube-like sound
- GZ34 metal base (e.g. Philips) and GZ37/CV378 gives more of a solid-state type sound
post #63 of 187
I would do the first two, and if you can't do both, do the coupling cap, the Vcap but the 2nd option is also very valuable.
post #64 of 187
Thanks for the quick reply! Regarding the tubes, I am still not certain as to how to differentiate between them. I read through the WA6 rectifier tube rolling thread and then came across these tubes on eBay, and was wondering how they would compare / which are preferable:
- Philips GZ32
- Mullard GZ32 Black Base
- Mullar GZ32 Brown Base
- Mullard GZ37

The above seem to be fairly common (that is, easy to come across compared to the likes of metal base tubes or Bugle Boys).
post #65 of 187
Just wanted to bump this up, and ask if anyone knows or can describe what the various upgrades would do (sound wise specifically). I tried searching for terms like "V-Cap" and "woo coupling upgrade" but did not find much...other than this thread

Cheers,
X
post #66 of 187
This thread is pure gold! Lots of good info.
post #67 of 187
Quote:
Originally Posted by xenithon View Post
Just wanted to bump this up, and ask if anyone knows or can describe what the various upgrades would do (sound wise specifically). I tried searching for terms like "V-Cap" and "woo coupling upgrade" but did not find much...other than this thread

Cheers,
X
this may not really address your specific question but it may help
in your decisions later on...my mod has been burning in continuously
for the past 100+ hrs. and the sound characteristics have been
changing from good to great to "what the..." to good to...etc....
the sound stage is improved but still not ideal...the bass is more
focused but results fluctuate still...having pointed this out, i'll try
to assess what i've noticed in the modded version so far.

i can't be certain of the significance of each upgrade parts and
their respective roles in the findings i'm noticing but, let me generalize
what the single most significant difference is between the stock wa-6
and my mod (described in prior post):

my dad told me something about hifi audio many years ago when i was
just a boy, about the difference between good and great audio gear.
he told me that the biggest difference is in the amount of resolution
you hear at low volume with a superior audio equipment. if i go by what
his definition is, i think i can safely say that the modded wa-6 is a superior
audio equipment.

for the first time, i can hear pedal work of a pianist, the breathing of
vocalist, the moistened sound of their lips parting, the spine tightening
rumbling, growling and extended decaying sound of a double bass being
plucked and other sounds one might label as analytical, even at low volume
settings without losing the attractive nuance and velvety smoothness of a
tube sound. it's quite a pleasant thing to hear...it's the first time i can
distinctly notice the subtlety of texture, detail and SEPARATION in a low
volume output. that's not to imply that it is a result of a "loudness" sound
effect...it doesn't sound any "louder" nor seem to be at a higher gain with
a raised floor noise typically associated with higher volume...everything is more
salient, more dynamic but still wonderfully warm and smooth without the
slightest hint of sibilance nor that compressed sound...it's as if
every frequency has been brought up to an audible level without altering
nor shifting upwards the already salient frequencies...

i wish i could convey this in a more clear way but maybe one way to
put it is the analogy of putting a prescription glasses on. you notice
clarity and vibrancy of colors without having to squint your eyes to
focus, making everything a less strain or toll...
post #68 of 187
Great description! As the capacitor in the signal path is improved the signal passes with less influence of the cap. With the imrpovement of the power supply with better caps the ac musical signal that travels on the dc carrier is much better because the dc is cleaner and more pure and delivered with greater speed (less smearing of the frequency range) and so it goes as also the noise floor drops away revealing more detail and spatial information.
post #69 of 187
Quote:
Originally Posted by takezo View Post
...the bass is more focused but results fluctuate still...
Funny that you mention the flutuating bass takezo!
I've noticed the same thing myself while my WA6 (w/upgrades) has been burning in. (I have 375 hours on it now.) I have listened to it every evening during the burn-in process and noticed that sometimes, the bass would be perfect, then the next night, the bass would seem a little heavy and not as tight sounding, and last night, the bass was rather thin sounding. I was beginning to think my ears were playing tricks on me, so I'm glad that you mentioned that you have noticed the same thing. With nearly 400 hours on this amp now, surely things will start to settle down soon!
post #70 of 187
If you have Blackgates in the amp I wouldn't count on it. They can take over 800 hours and longer. The Vcaps can take as long.
post #71 of 187
Quote:
Originally Posted by jamato8 View Post
If you have Blackgates in the amp I wouldn't count on it. They can take over 800 hours and longer. The Vcaps can take as long.
Yes... I have the Blackgates and the V-Caps. WOW! 800 Hours??? Everything I have read regarding break-in on these indicated that 400 hours was the magic number! No wonder this amp continues to sound different every night... I'm only half-way there!
post #72 of 187
Sorry, I know I have also said 400 hours but I lied. I didn't mean to but it was more to myself as I just can't stand waiting that long for the sound to really improve, a whole month or more, gag. Well, when you get there you will be happy and nothing equals Blackgates in the right application. I have used them in the signal path, and still do, with excellent results. The Vcap, well it is one of the top two caps in the world, the other being the Audio Note Silver, but at the cost of the Audio Note I would be extremely happy with the Vcap.
post #73 of 187
Is it just me or is Jack using new output transformers in the WA6 also?
post #74 of 187
They might have new material over the laminations, which is often done on power supply transformers. It is used on ps transformers to help quiet them by holding the laminations securely in place. You can always email Jack and ask him.
post #75 of 187
Quote:
Originally Posted by phaseshift View Post
Is it just me or is Jack using new output transformers in the WA6 also?
Could be!


Early Production WA6 Transformers


My WA6 Transformers
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