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WEE - new product from Woo Audio

post #1 of 193
Thread Starter 




WEE (Woo Audio Electrostatic Energizer) is an electrostatic headphone converter for dynamic speaker amp. It converts speaker amp output to be usable for electrostatic headphones. To connect this setup, basically, you will need a speaker amp, a WEE, and an electrostatic headphone such as the Stax. If you already have a speaker amp setup, the WEE is probably the most economical solution to start enjoying electrostatic headphones.


Standard build will have two 5-pin PRO bias Stax outputs. We can build one 5-pin PRO and one 6-pin NORMAL on request. The WEE comes with speaker output terminals, allowing speakers and headphone switching within the box. Since the WEE is highly efficient, speaker amp output requirement is as low as 3 watts. It is worth to note that your speaker amp plays a major role in this setup because it acts as a source.


WEE Prototype

The picture above is a prototype unit which was debuted in Chicago CanJam 2010 (WA5 -> WEE -> Stax). The knob on the faceplate is a switch between speaker and Stax output. The pre-production unit will be ready for North Carolina CanFest in August 14th, 2010. Come to see and listen to this beauty.


The offer price is $499, including US domestic shipping cost. Production unit will be shipped in 6 to 8 weeks from now. Pre-order is now accepted.


Stay tune as the pre-production unit will be published here shortly.


Thank you for reading,

Edited by WooAudio - 8/3/10 at 9:04pm
post #2 of 193

So this is a speaker amp?

post #3 of 193
Originally Posted by cifani090 View Post

So this is a speaker amp?

.....  So anyway, back on topic, this looks like another GREAT product from woo.  I may dive into electrostatic headphones, and this seems like a great way to jump in without it costing too much. Can't wait to see reviews

post #4 of 193

Great product idea!! Thanks Jack.

post #5 of 193


It has been 20-ish years since Stax produced their last transformer (SRD-7 Pro / MK2), and I sure think there is a market out there. I will definitely look out for impressions/reviews.



post #6 of 193
This is tempting. I have a Jadis Defy 7 just sitting collecting dust that might be a sweet match with this and my Jades.

It could be my JWJ System, has a sort of ring to it.
post #7 of 193

Waw, it sounds like excellent idea to “connect” world of electrostatic and electrodynamic headphones. If I correctly understand, when you own good one woo audio amp for eletrodynamic models, then you can “connect” electrostats like STAX?

post #8 of 193

For clarification -


The source signal from your player of choice (DAC, analog, etc) is sent to a SPEAKER amp you already own. The amplified signal (from speaker outputs) is then sent to the WEE where it is TRANSFORMED (hence transformer) into a signal compatible with the 5 or 6 pin Stax plug and thus headphones.


The WEE also has speaker outputs so it acts as a switcher for headphones and speakers. (speaker level inputs and outputs on back, headphone outputs on front)

post #9 of 193

Thanks for all your info.

post #10 of 193

Any pictures of the rear panel? I'm wondering what type and size of binding posts are used. Many potential users have "High-End" Speaker Cables that might not fit, so the speaker switch feature becomes problematic.

post #11 of 193

Looking forward to comparisons with the Stax SRD7.

post #12 of 193

Wow that is awesome looking.

post #13 of 193

Posted in another thread - Reposting here:




My observations of the WEE proto that I shared with Jack:


So, a while ago I was listening to my WA5 pushing the great AT L3000's and I started to wonder 'how would the STAX O2's sound sourced with this lovely 300B sound that I have grown to really like?'  (no offence Spritzer) There are no 300B Electrostatic amps out there that I know of. Pretty much most of the third party amps are based on the same kind of design, running off the EL34's or variate. I have been running the SinglePower ES-1 for many years now with really good results in my setup.
Being that I have a standard WA5, there was one option available to me. Hook up an 'energizer' to the speaker outputs and see if I can get good 300B sound that way. I was able to borrow a STAX SRD from Voltron for a little bit, and it peaked my interest in using this as a way to consolidate my systems (reduce the number of amps I have). I kept my eyes out for a STAX SRD(), but they either seemed to go for more than I wanted to pay... or they were gone in minutes.
As a side note, I contacted Jack from WooAudio. And asked him if they would consider making a 'one off' build of an energizer that I could use with the WA5. We passed emails back and forth for a while, but it didn't seem to be in our future (for several reasons).. In the mean time, I happen to catch one of Spritzer's builds of a SRD7 with the pro board, so for a good price I snatched that up. I hooked it up and was very pleased with the resolution, and overall sound that I got.
Well too my surprise, just before CanJam, I got a note from Jack. They had made a prototype electrostatic converter (energizer), and it would be at CanJam.. I was sad to report that I was not able to make it to Chicago this year. But Jack offered to let me take a listen to it after the show. Well a few weeks ago the package, with the now named WEE, showed up... So, I have spent a few long weekends listening to the WEE as compared to the dedicated SP ES-1 amp. I didn't get a chance to Listen to it compared to the SRD7(mod).
Marantz SA-7S1 -> AQ Sky RCA -> Woo WA5 -> Exposure cable -> Woo WEE -> STAX O2
Marantz SA-7S1 -> Virtual Dynamics Master XLR -> SinglePower ES-1 -> STAX O2
WA5 Tube set?:
Mullard gz34 - metal base 1955/rs1
WE 300B
Some notes from my sessions:
Alison Krauss + US - Live - SACD - #9-"Stay":
WEE - Alison's voice is floating dead center, detail is very high, each instrument is presented in it's own space. I want to say 'crisp', but not in a bad edgy way, but more that the leading edge of the notes have impact, The presentation is close, giving about a 2nd row feel. Nothing is being done wrong here.
ES1 - Is giving a more open presentation - more echo of hall, slightly larger bass presence, not really more impact, just larger. This steps back away from the stage a bit to the 4-5th row. The Instruments are more smeared across the soundstage rather than given a precise location. Slight touch of shrill on one upper note that I don't get off the WEE combo. It is still a really good sound, I realize how I have lived with this sound for so long.
Imogen Heap - Speak for Yourself - #11 "Closing In" - #12 "The Moment I Said it":
Note: One quick observation switching back and forth, the WA5->WEE is much quieter than the ES-1 with both being at rest. This could lead to some of the results for the WEE combo. A quieter background, more inner (low level) detail, not feeling the need to turn it up as much. Just as another note, the amps are not level matched, just matched by ear (and people that know me, know that it is pretty loud).
ES1 - SP up first this time with two tracks. Getting a huge presentation, voice piercing threw the background, nice bass presence, there is a lot of movement going on in these tracks and the ES1 is presenting them very well. It is rare for me to experience, but the headphones disappear on these tracks, I only get pulled out of music when there are large bass notes that let me know that there is something on my head. Nice to listen to these tracks
WEE - Right out of the gate the WEE has dynamics, subtle changes in sound level that seem to be lost be the ES1. There is detail and detail here (probably will say this a lot) More of a center presentation, where as the ES1 painted sound all over the place, the WEE is putting most of the sound towards the center. Again, note impact, I guess goes along with the dynamics. Not as much bass depth, there is bass, just not as low and as big as the ES1. The WEE combo gives what I would say is an intimate presentation ... hmmm (crackle in right driver)
That is the end of the formal listening period... The crackle had made it unfair to review it further.   I have continued to listen to the WEE for the many more hours. During the extended listening the WEE supported all the findings I had heard during critical listening. Really centered around the amount of detail and impact the WEE had over the ES-1. The ES-1 seemed to cast the larger soundstage, but it was also more defused. So the detail and precise nature of the WEE soundstage was very nice. One note on the bass, one thing that I don't know is the real source of the bass I was getting out of the ES-1 vs WEE? My feeling is that the Bass is really coming from the WA5 and the WEE is just presenting all the bass that it can find. I ran one additional test of pushing the WEE from my Exposure XVIII speaker amp (solid state). This combo running the O2's seemed to extend the bass a little lower and tighten it up compared to what I was getting from the WA5 combo. The 300B's have never been known as bass tubes? more about getting the midrange right.
I really enjoyed my time with the WEE proto. It is an impressive piece of kit. Pushing it with an 80w ss amp into the O2.. made the O2's really respond as a pair of speakers, not really headphones anymore. As far as the crackle, I was not really worried about it I didn't see it as a flaw in design or anything, just something loose or a component having a problem.  I will be looking forward to the production units and the options/upgrades.
So those are my thoughts and observations.. I really Liked the WEE and I think that it does what it is suppose to do and that is present the sound that it gets from the Amp to the Headphones.. I felt that I was not really listening to the WEE as much as I was listening to the different Amps. One thing that I didn't get a chance to try was the Speaker Switch.. I never really intended to have it in the middle of my Speaker connection. Either I would listen to the speakers or the WEE not with it in between. 
Is it a STAX dedicated Amp killer.. No, but I don't think that it is meant to be.. But I can get very pleasurable results using it.. and maybe reduce my amp count... BTW the production unit will have better transformers acording to Jack.
Thanks again to Jack for the loaner...
post #14 of 193

Thanks for the great post mikeymad!  I have the same amp as you and am looking forward to the possibility of also getting a transformer for my WA5 amp.  I used to have a 717 and KGSS for my Stax but hated the hassle of having a completely different amp just to listen to a pair of Stax headphones. This would fit the bill nicely and be a nice update for the old stax transformers out there.  Btw, I wonder how you think the WEE compares to the SRD transformer that you also own?  Is there much of a difference or are they both pretty much the same.  I am hopeful that these might be better than the SRD in terms of using better quality transformers that power the O2 better than the SRD.

post #15 of 193
Well my idea of a JWJ (Jadis - Woo - Jade) system has infected my mind, so I have gone ahead and pre-ordered a WEE. I'm also curious as to how the WEE being driven by my NAD 326BEE office amp will perform.

Now let me look around here and see what I might be able to sell to fund this purchase.
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