Woo Audio Amp Owner Unite
Mar 18, 2012 at 8:40 AM Post #19,711 of 42,298


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Initial impressions: The Silent One of Legend was kind enough to let me in on his 596 "martian" rectifier (complete with glenn2359's adapter)'s world tour
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First of all, it's an absolutely beautiful tube in person; the pics that have been published to date don't do it justice. The old glass seems thick, and almost looks hand-blown.
 
This won't be a full review by any means, but I will give a little background of my preferences before offering my impressions. I gravitate back and forth between vinyl, and ALAC out of a computer/DAC. I'm using the 596 in a WA22 with balanced ins and outs, so my experience could be different that those using it in the WA6/SE.
 
Generally, I stick with pretty sold-state sounding tubes in Woo's "most euphonic" amplifier. Along those same lines, when I build a listening rig, I like to mix solid state and tubed components for balance. If I have a sold state amp for example, I like to use a tubed DAC or phono stage, or have a tube stage in between. Conversely with the WA22 I use solid state sources, no tubes except for the amp.
 
I have tried just about every tube that I want to try in my WA22, with the glaring exceptions of GEC and Mullard. My current tube/headphone setup has been reviewed as (possibly) the "Ultimate Headphone System", and I have been sticking with the tubes used in that review, for which I have backups except for the Princess. I have some great drivers in my collection but pretty much stick with the Treasures. I have two different EML rectifiers but have been sticking with the Princess, and have two great pairs of 5998s but stick with the 7236 power tubes. My headphone cable and source is different that those used in that review, but I am quite satisfied with my setup.
 
I also use the LCD-2, and initially what attracted me to this tube selection is that I felt it optimized both headphones without having to roll back and forth, which I was finding confusing and a bit frustrating as there are so many different combinations for this amp. Lately however, I have been using the HD 800 almost exclusively with the exception of some poorly-pressed vinyl, which I seem to have quite a bit of (common for 70's-80's pop/rock). The rev.1 really fills in that lower octave and cures the excess brightness of these albums. I have been shying away from the LCD-2 lately with digital though.
 
Back to the 596, in my system, keeping the other tubes constant. I listened to a pretty well-done record, an intimate acoustic series called the Bridge School Concerts by Neil Young and quite a few of his friends. I really liked it with the HD 800, the 596 seems to be pretty holographic in its presentation and opened up the recording very nicely without sacrificing any detail. I didn't like it quite as much with the LCD-2, but wasn't bad at all really. I'll have to try a more "challenging" LP at some point to see if this preference changes.
 
My initial thoughts at this point is that the 596 seemed to offer the punchiness of the Princess, combined with the holographic soundstage of the EML 5U4G, kind of the best of both worlds but offering something of its own as well that I hadn't quite put my finger on yet. I probably still haven't as this is my first listening session with it.
 
Keeping the HD 800's on I went to the computer, where I have been listening to 194 Cowboy Junkies songs on random play lately and I am familiar with the material. Most of it is very well recorded, with fantastic range, vocals, and damn near subterranean bass so it's great for reference. The 596 surprised me once again. Frankly, the HD 800 with it turned out to be quite the sobering experience (not literally, as I don't do the St. Patrick's day thing anymore
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). In a nutshell while it was fantastic with a few songs, I was getting quite fatigued with most of them. The highs seemed too aggressive, perhaps more extended as well and I couldn't take it anymore with these headphones
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After that I switched back to the LCD-2 and bingo
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! Magic, I'm telling ya. I have been at the point where I was not enthusiastic at all with the rev.1's and digital music out of this rig lately and the 596 changed that for me completely. The upper aggressiveness/extension is just the remedy for their "veil", and the soundstage is much improved with the 596's euphonic, holographic presentation. With the HD 800's the 596 didn't quite the have the low-end punch that the Princess offers (but it wasn't bad by any means in that department), and with the LCD-2 I don't notice any deficiency in this area at all. The 596 and LCD-2 rev.1 is truly a great combo, at least for me, with digital music and the rest of my setup.
 
So I'm back to having to roll tubes for the two headphones, but at least it's only the rectifiers. And as I said I was already there anyways, as I was getting disenchanted with the LCD-2 and digital with the Princess, while the HD 800 was sounding better and better with it. After I try a different vinyl album with the 596/LCD-2, I will start the process over and roll in the two EML rectifiers (274b mesh plate and 5U4G) for comparison purposes so there is definitely more listening to do!
 
I will also attempt an a three-way "Glenn2359" fixture photo shoot at some point; I will roll out the Treasures and put in my Tung-Sol 6F8Gs with his 6SN7 adapters. This has been posted here before but it's been awhile. I will also try a close up of the 596, just to try to capture its true essence as it's quite a beautiful vintage piece of glass.
 
Thanks again Silent One, if you ever decide to sell this guy I may want to call dibs if no one else has yet
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It does seem to be in scarce supply, and it's due to this thread so big thanks to Glenn2359 as well for suggesting it to us
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Great Prelim! I was just fixin' to have breakfast and go to bed - my most wonderful all-night session just wrapped. Your words left me wide awake! Looking forward to following your thoughts as they come down with further listening and observations. I'm also still scouring the Earth to unearth another USAF-596!
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Mar 18, 2012 at 9:04 AM Post #19,712 of 42,298


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That is very nice pairing but you have to find more SS sounding tubes...  Don't kill me, but I think D7000 sounded the best out of SS amp.

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I agree with you on this one. I've bought (and sold) the D7000 twice. But I won't be going back for thirds.
 

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I think the D7000s perform much better with the tube amps I have owned compared to the solid state amps I have owned (those being Nuforce amps which are really dry in my opinion).


 
I have both Glass & SS rigs. Have enjoyed listening to others Glass & SS rigs with my D7000. I find it excels with both amps. Not only that, my Zeus cabled D7000's smashed through three stereotypes I kept hearing about the Denon's: 1) Must be paired to Solid State to sound great;  2) Won't sound good @ 25 ohms w/OTL amps;  3) Not good for Classical. 
 
With number "3" specifically, I'm guessing no one's heard Janos Starker - Starker Plays Baker 24/96 kHz. Recorded Direct-to-Tape from the Indiana University Opera House (Ampex 2 Track Stereo 1/4 inch @ 15 ips w/no noise reduction). When heard through the D7000... stunning! 
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Mar 18, 2012 at 11:52 AM Post #19,713 of 42,298


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First preliminary pictures of the WA6. Review should be up in 2-3 weeks. Still have a lot of listening to do and a lot of headphones to test out.
 
 

 
 


Beautiful photos, as usual, Austin!  Any chance I could have this one as a wallpaper?
 
 
 
Mar 18, 2012 at 12:12 PM Post #19,714 of 42,298


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Beautiful photos, as usual, Austin!  Any chance I could have this one as a wallpaper?
 
 



Yes, let me post a high res one. 2560 x 1600?
 
Mar 18, 2012 at 12:21 PM Post #19,715 of 42,298
Here are almost all the formats, in case anyone wants to use this as a wallpaper.
 
2560 x 1600
 

 
1920 x 1200
 

 
1600 x 1200
 

 
1920 x 1080
 

 
Mar 19, 2012 at 1:14 AM Post #19,718 of 42,298
Hey Austin, How does it sound??????? What was the first music you listened tooo?
 
Mar 19, 2012 at 2:21 AM Post #19,721 of 42,298
Easy question my friend. One of my favorite reference tracks. "You asked me to" Allison Krauss on the Waylon Jennings Tribute "I've always been crazy". This is the Track I get a feel for a piece of equipment.
 
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Hey Austin, How does it sound??????? What was the first music you listened tooo?



What was the very first track you heard on your supercharged WA3?



 
 
 
Mar 19, 2012 at 2:47 AM Post #19,722 of 42,298


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Easy question my friend. One of my favorite reference tracks. "You asked me to" Allison Krauss on the Waylon Jennings Tribute "I've always been crazy". This is the Track I get a feel for a piece of equipment.
 


 
 


For my 6 Special Edition (and several other pieces of kit): "Holidays" - Abraham Laboriel, Sr (1993) as reference. 
 
 
Mar 19, 2012 at 2:59 AM Post #19,723 of 42,298
I'll write a few sentences, just in minute, preliminary detail. When I first got the amp, I found it overly lush, boring, and way too dark. Didn't sound very good at all. However, things changed after an overnight burn in. Soundstage expanded both in terms of width and depth, with layering about the same. The top end seemed a tad more sparkly, but still slightly recessed with a bit of grain. The middle part of the spectrum was very warm, lush, and acoustics seem to come off as very well pronounced and full bodied, without any edginess or sibilance. Down low, the WA6 seemed weighty, decently well extended, and colored up the midrange quite a bit.

Again, not very detailed, but I still have a lot of listening to do.
 
Mar 19, 2012 at 3:57 AM Post #19,724 of 42,298
Make sure not to run the WA6 too long without a break, this is straight out of the manual, I never did overnight burnings with this amp just based on that advise. 
 
Do Not: "Leave the amps running unattended. To use the amps safely, please allow it to cool down for every 8 hours of continuous play time." 
 
Mar 19, 2012 at 4:38 AM Post #19,725 of 42,298


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Fellow member sillysally posted some very useful info recently (see below):
 
*** Yes Jack seems to build in a "soft start" with these amp. One thing to keep in mind is that if you turn off your Woo and don't let it cool down before restarting your Woo the "soft start" will not work.


I find this bizarre.  My Super 7 soft starts everytime not matter if it's cooled down or not.  Why would the Woos not be able to do this?
 
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Make sure not to run the WA6 too long without a break, this is straight out of the manual, I never did overnight burnings with this amp just based on that advise. 
 
Do Not: "Leave the amps running unattended. To use the amps safely, please allow it to cool down for every 8 hours of continuous play time." 


This seems odd as well.  Many tubes were designed for military use and run all the time.  I can't imagine the DoD or Kremlin worrying about their tubes/amps during the Cuban Missile Crisis.  Sounds like lawyer jargon.
 
 

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