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Woo Audio WA6 SE - Internal Photos, Pg. 10/11 - Page 7

post #91 of 183
Quote:
Originally Posted by jantze View Post
Internal pics would be nice

I'd love to see internal shots as well
post #92 of 183
Thread Starter 
Ok you amp voyeurs, internal photos of the WA6 SE for your viewing pleasure. The insides are beautiful and tidy.

Top of PSU


Bottom of PSU


Top of Amp Section


Bottom of Amp Section
post #93 of 183
very interesting. Thank you for doing that for us all.
post #94 of 183
hey breakfastchef, you beat me to the internal pics. Nice job. However, my PSU has one blue capacitor in that row of three you show in your pics... hmmm, I wonder what it is and why it's different. Also, I've been burning in my amp for the last day and a half, so i'll see what changes, if any, occured (I hope it smoothed out a bit). So far, the transparency is stunning and the definition is as near flawless as I can imagine... but it still has that synthetic quality. So, what tubes can I try that would be dirt cheap (I'm strapped for cash) that might fatten up the sound a bit, smoothen things out, and add some more emphasis in the mids/lower-mids? The metal base and 274B are just too expensive now. Also, would rolling the 6dE7 help any and what should I try (cheap and please indicate typical prices if you know them). Thanks for the help.
post #95 of 183
Very nice. Clean layout I must say. Easy to service if ever needed. Thanks for sharing, breakfastchef.

Glenn
post #96 of 183
I've been thinking about getting a WA6 SE. I have a stupid question. How does the Power ON/OFF feel. Nice and solid I hope? I'm very picky how things feel. Some of you will probably think I'm crazy, but that's how I am...Oh well
post #97 of 183
Thread Starter 
Quote:
Originally Posted by atbglenn View Post
I've been thinking about getting a WA6 SE. I have a stupid question. How does the Power ON/OFF feel. Nice and solid I hope? I'm very picky how things feel. Some of you will probably think I'm crazy, but that's how I am...Oh well
I think I know what you mean when you use the term 'solid'. On a scale of 1 to 10 the solidness of the power switch is probably around a 7. This is a really well built amp; I cannot readily find an apparent flaw in the build or the output from the headphone jack. I am very pleased with this purchase.
post #98 of 183
Thread Starter 
Quote:
Originally Posted by mmwwhats View Post
So, what tubes can I try that would be dirt cheap (I'm strapped for cash) that might fatten up the sound a bit, smoothen things out, and add some more emphasis in the mids/lower-mids? The metal base and 274B are just too expensive now. Also, would rolling the 6dE7 help any and what should I try (cheap and please indicate typical prices if you know them). Thanks for the help.
I just rolled the driver tubes to Sylvania NOS 6DE7's this evening. My first impression is it lightened up the sound putting a bit more emphasis on the highs and mids while the bass stay rather tight. These are premature impressions as the tubes are not burned in yet, for that matter, the Princess is not burned in yet. If you have the scratch, I still believe the Sophia 274B rectifier produces the biggest sound change for the money. The driver tubes probably change the sound by, maybe, 15%. This amp is more neutral and SS-like in its accuracy than what I would normally expect a tube amp to sound. Regardless, Woo has a new fanboy! I will try to contain my enthusiasm.
post #99 of 183
Looks very nice. I like the power supply emphasis. I think it adds to that more of a velvety smoothness and definition as a good amp should be.

post #100 of 183
Quote:
Originally Posted by breakfastchef View Post
Woo has a new fanboy! I will try to contain my enthusiasm.
Don't worry about it, just enjoy it and tell us how much. Anyone else would do the same and should understand. For myself, I like my stuff too. I think it is good we both enjoy our equipment, fanboy or not! Enjoy the music.
post #101 of 183
Quote:
Originally Posted by mmwwhats View Post
...but it still has that synthetic quality. So, what tubes can I try that would be dirt cheap (I'm strapped for cash) that might fatten up the sound a bit, smoothen things out, and add some more emphasis in the mids/lower-mids?

...and what should I try (cheap and please indicate typical prices if you know them).
it sounds to me that you're describing the general sound characteristics of the
akg 701... neutral or lean... with slight de-emphasis in the mid-bass and sub-bass
regions... though smooth mids are what they're renown for...

i'm not sure what you mean by "synthetic" but my guess is that you mean
flat, grainy and recessed... it'll help to know what you mean exactly.

you may want to try a 5R4GA for the rectifier instead of the sovtek 5u4g...
it has a balanced mid/high and well extended/solid mid bass... it has
a very analog sound for me and it's very cheap at around $10... the 5AS4 will
have a deep and very impacting bass but they're a bit more expensive
and harder to find, at around $25... of course, the 5ar4/gz34 has the
"smoothest" mid range that i know of (haven't tried the sophia princess) but
are relatively expensive at around $75 each... hope you find what you're
looking for.
post #102 of 183
Thanks for the info and tips Takezo. The synthetic quality is nothing I've heard before (and is therefore hard for me to describe) and I've been listening to high-end gear (though stereo not headphone) for a while. I'd say it's a graininess to the mids and highs with an emphasis in the high mid frequency and low treble giving it a sort of sibilance. That'd pretty much sum it up. However, I've listened to the AKG 701s through my MP3 output jack, computer output jack, Channel Island Audio VHP-2 + VAC-1 amp, and SinglePower MPX3 and other differences notwithstanding, I've never heard this synthetic quality before. And just to dismiss some hypotheses, it doesn't in ANY way sound as though there's a flawed component or tube in my particular WA6 SE.

Oh yeah, any specific brand of 5R4GA or GZ34 that you recommend?
post #103 of 183
it seems to me you're describing a sonic characteristic that may be
due to bad synergy... the source, amp and the can may all share
that "synthetic" quality and putting them all together is emphasizing
it even more... you may need to go to a new can or an amp that
is naturally warm... of course, a better rectifier may help...
the 5R4GA is made mostly by RCA and very few other type exists.
the mullard brand of GZ34 is recommended. it's a bit more tricky
to identify mullard consistently because many are rebranded like
telefunken, valvo and amperex... but just be reminded that you
shouldn't pay more than $75 even for a NOS... (except for metal
base and fatbase versions of the GZ34.) the GZ32 is more affordable
at around $35 and the mullard version is considered very good.
it has a warm midrange that's very smooth and has that tube
bloom characteristic which may help with a set up that's lean/cold.
the american version of the GZ32 is the 5v4g but it doesn't have
that blooming thing going for it...

and forget about boxed originals that go 50% higher in price...
unless it's sealed it's hard to tell if the tube and box were genuinely
paired from the start.
i hope you find some of this helpful.
post #104 of 183
Takezo, again, many thanks... everything you said is extremely helpful. I'll purchase what I can afford and see if it helps. I was listening critically last night to see if I can identify what I like and what I don't. Truth be told, this amp is stunning; it does things I've never heard before; period. Mainly, it's the stunning transparency, seperation of instruments, and dynamics, that give this amp a character that's hard to draw yourself away from... At the same time, I'm still having the 'synthetic' issues I've mentioned before. It could be a problems of synergy, tubes, or whatever, but it's there. Kind of like a stunning women with a flatulance problem; can't pull yourself away, but can't quite commit. I'm not giving up the WA6 SE just yet; not nearly. If I can ameliorate this small problem (and it is a small, but extremely annoying upper-midrange bump in the freq. that sounds like the culprit) then this amp could be "The One" for me... if I can't, well, then I don't even know which other amps to even start looking at. Either way, I'm going to try some things out and see what happens.

BTW, anyone have any insight as to why I have a two black rubycons and one blue cap (whose manufacturer I don't know right now) in my bank of three caps in the PSU, while breakfastchef (as shown in his internal pics) has a bank of three black rubycons? Also, the two transformers on the amp chassis of the WA6 SE, are they also part of the regular WA6, because it doesn't seem so?
post #105 of 183
Do some close-ups of the circuit.

With higher resolution, which you are going to get with an excellent PS and a short signal path that is correctly implemented you will here all these little characteristics. What headphones have you tried? Also, you are going to hear the differences of rectifiers and the Russian one is not one of and maybe, my least favorite. I would even get a good Japanese new old stock 5AR4/GZ34 which was made by Japan on old Mullard tooling. They are excellent and last about forever.

The SE has inductors, which the regular 6 does not. It is all part of the power supply to further refine it. Inductors help with ripple, current reserve and the caps with ripple and voltage (joules of reserve).
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