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BHSE or Woo WES? - Page 6  

post #76 of 155

If you mean the difference between the Headmp versions of the KGBH and KGBHSE I believe the latter is an upgraded version sold as a 2 box solution.


Edited by jjinh - 9/3/10 at 5:19pm
post #77 of 155
Quote:
Originally Posted by jjinh View Post

If you mean the difference between the Headmp versions of the KGBH and KGBHSE I believe the latter is an upgraded version sold as a 2 box solution.



NNah, I'm talking about in terms of the actual circuit and measurements etc.

post #78 of 155

Awesome single board solution in the amp, upgraded psu, some devices changed for newer parts in particular the banks of 1968s (current sources).

I'm sure there's more.

post #79 of 155

Different input fet's (2SK389 no longer made so changed to LSK389) and the output stage CCS has been swapped to 10M90's, two per channel.  On top of that the new Headamp units have much better fit and finish, better input handling etc. but most importantly the old  BH amps were never run at full power (due to the heat this puts out) but the BHSE is running at full power. 

 

No schematics I've ever seen but this isn't actually hard to work out.  The only real issue is working out how much current should go through the EL34´s but that's a question you always have to deal with in any amp design. 

post #80 of 155

Error.


Edited by rsbrsvp - 6/25/11 at 1:59pm
post #81 of 155

Error..

post #82 of 155

 

It all depends on which headphones you are using. Given you have both the 007A's & the 4070's - two top e-stats with quite different basic sound signatures, pros, & cons - it seems near impossible to select one amp & tube complement to...er, compliment both simultaneously. In general, jp#'s post sums up my (admittedly limited) experience with Stax & the various top e-stat amps mentioned. Synergy is king. It all depends on where you want your euphony/detail to come from.

Perhaps a better question is which tube sets work best with each Stax on your Woo WES?

 

 

I just recently try 009 on DIY T2. It seem to be too revealing. T2 better fit with 007 mk1

 

Woo Wes vs Woo Wes Max vs Personal modification which one is fit for 009?

I brought Woo Wes and found stock tube sound just ordinary nothing interesting. I have chance to listen on Woo Wes Max V-Cap with 50 year shugang tube but I don't like it due to v-cap sound signature is too reveal and too bright for 009, shugang give bigger sound stage but nothing more than that. (No wow factor)

 

Woo Wes Personal modification

I start modify Woo wes by changing Mundorf, the MCap Supreme Silver/Gold/Oil in the signal path and change the solder wire to mundorf as well. Sound signature is like what jimmy said in his link http://jimmyauw.com/2009/08/18/extreme-capacitors-battle-2nd-session/

"this capacitor has good staging and good emphasize in high frequency notes. While the oil inside this capacitor will still maintain the vocal from becoming to “cool” as the VCap. If you expect a live sound, while still expecting an adequate mid-vocal (don’t expect it would be too sweet)"

 

Tube rolling by mix and match between the following old stock tubes not reissued

-12au7 - Philip mini watt, Tungsol smoke glass, Tele rib plate, tele smooth plate

-Mullard gz34, gz37

-6SL7 RCA black base, Tungsol black glass

-mullard el34 xf2 single getter, xf4 D-getter, KT66 GEC, kt88 GEC

 

The tube set that give best performance on 009 is

 

Mullard gz37 - dull than gz34 but make 009 not too bright
Tele 12au7 smooth plate - audiophile signature
Quad 6sl7 Tungsol smoke glass - sweet vocal sound
Quad KT88 GEC - improve image and sound stage
 
Source: pioneer DV-s9
interconnect RCA Oyaide ftvs-910
 
Hope it help for the amp selection for 009 owner and plan to obtain WooWes vise versa. 

 

 

 

 

post #83 of 155
Quote:
Originally Posted by Birdoffice View Post

 

 

 

I just recently try 009 on DIY T2. It seem to be too revealing. T2 better fit with 007 mk1

 

Woo Wes vs Woo Wes Max vs Personal modification which one is fit for 009?

I brought Woo Wes and found stock tube sound just ordinary nothing interesting. I have chance to listen on Woo Wes Max V-Cap with 50 year shugang tube but I don't like it due to v-cap sound signature is too reveal and too bright for 009, shugang give bigger sound stage but nothing more than that. (No wow factor)

 

Woo Wes Personal modification

I start modify Woo wes by changing Mundorf, the MCap Supreme Silver/Gold/Oil in the signal path and change the solder wire to mundorf as well. Sound signature is like what jimmy said in his link http://jimmyauw.com/2009/08/18/extreme-capacitors-battle-2nd-session/

"this capacitor has good staging and good emphasize in high frequency notes. While the oil inside this capacitor will still maintain the vocal from becoming to “cool” as the VCap. If you expect a live sound, while still expecting an adequate mid-vocal (don’t expect it would be too sweet)"

 

Tube rolling by mix and match between the following old stock tubes not reissued

-12au7 - Philip mini watt, Tungsol smoke glass, Tele rib plate, tele smooth plate

-Mullard gz34, gz37

-6SL7 RCA black base, Tungsol black glass

-mullard el34 xf2 single getter, xf4 D-getter, KT66 GEC, kt88 GEC

 

The tube set that give best performance on 009 is

 

Mullard gz37 - dull than gz34 but make 009 not too bright
Tele 12au7 smooth plate - audiophile signature
Quad 6sl7 Tungsol smoke glass - sweet vocal sound
Quad KT88 GEC - improve image and sound stage
 
Source: pioneer DV-s9
interconnect RCA Oyaide ftvs-910
 
Hope it help for the amp selection for 009 owner and plan to obtain WooWes vise versa. 

 

 

 

 


Birdoffice, many thanks for this very informative post. Well Done!

 

I bought the WES with V-caps and the 009 5 months ago. The 009 is a fantastic headphone, incredible detail and very even. But the V-capped WES sounds right with the 007mk2 and too bright with the 009, as you said. [source Meridian 808.2i, Jena Valkyrie XLRs]

 

I too have swapped tubes, because the stock tubes are mere place-holders -- 3 sets of 6SL7s, 3 pairs of GZ34s, 2 sets of 6CA7s. Right now, I am using

Shuguang Treasure 6CA7s (Woo upgrade - nice soundstage and detail)

Sophia 6SL7s (Woo upgrade - clear and musical)

Mullard GZ34 1972 Kuhltube (tubeworld - black background, excellent transients)

and it still sounds bright. Jack Woo suggested sending the amp back to have them install upgrade choke loads for the 6CA7s for $900, but when it arrived there they found that they were already in place. Next he suggested replacing the PSU caps with Jensens for $900. I asked him to ship it back.

 

I strongly suspect the V-caps, and your post seems to be right on the money. I wish I could have heard the WES with the original coupling caps. I bought a used BH, and it has perfect tonality -- it is DC-coupled, has no coupling caps. But it doesn't provide the inner detail that the 009 reveals with the WES.

 

I just received a quad set of Mullard double-halo 1960 xf2 EL34s ($800), but I haven't tried them in either unit yet. It looks like I should try KT88s GEC and Mullard GZ37s.

 

I would very much like to follow your lead and install the Mcaps. I wish I could afford Duelands ($700 x 4).

 

 

 


Edited by budx3385 - 11/28/11 at 7:57pm
post #84 of 155

I would recommend Jensen mix with mundorf. I try on my 300b and jensen help improve stage and vocal. We need more than 4 caps to cover signal path (4 output +4-8 interstage) so i cannot effort Dueland.

 

See jimmy review http://jimmyauw.com/2009/08/30/in-depth-session-jensen-copper-foil-paper-tube-vs-duelund-cast-pio/

 

"Also we held a Cayin CDT-17A short mod session. The best combination after several times testing is the 0.47uF Jensen Copper Foil Paper Tube  + 1uF Mundorf Supreme Silver/Gold/Oil. This combination provides excellent vocal with superb staging and details."

post #85 of 155

Another excellent suggestion, Birdoffice.  And a bit less expensive, too. After all, it's really about the sound and the music!

 

The xf2 EL34s brought the tonality of the WES back to earth - the treble ring in the sustain following each transient is almost gone, and a violin sounds more like a violin, rather than fingernails on the chalkboard. I guess after another 200 hrs or so the new tubes will have settled in with the Vcaps - at least I hope so.  Still, I've been looking at the prices at different shops selling Mcaps, as you suggested.

 

 

post #86 of 155



 

Quote:
Originally Posted by budx3385 

 

I would very much like to follow your lead and install the Mcaps. I wish I could afford Duelands ($700 x 4).

 

 

 


$2,800.00 FOR 4 COUPLING CAPS?  Go to Ebay and buy yourself some Russian military K40Y PIO. Probably cost you $20.00 or less. You might be surprised.
 

 

post #87 of 155

Seem both of us have same taste therefore I would recommend original KT88 GEC that should bring your amp to the next level. Xf2 is brought tonality but cannot provide big sound stage like 6CA7. Singer just sit close by you and headband is smaller. KT88 GEC give you sound stage like 6CA7 with more musical audiophile tone.
 

Quote:
Originally Posted by budx3385 View Post

Another excellent suggestion, Birdoffice.  And a bit less expensive, too. After all, it's really about the sound and the music!

 

The xf2 EL34s brought the tonality of the WES back to earth - the treble ring in the sustain following each transient is almost gone, and a violin sounds more like a violin, rather than fingernails on the chalkboard. I guess after another 200 hrs or so the new tubes will have settled in with the Vcaps - at least I hope so.  Still, I've been looking at the prices at different shops selling Mcaps, as you suggested.

 

 



 

 

post #88 of 155

OK. I will see if I can get a set to try out.

Tx

post #89 of 155

Sorry, I don't mean to thread hi-jack, but why is there a lack of love for the RSA A-10 Thunderbolt 2?

 

I've been lurking around these areas, and there hasn't been much word about it. Are there issues that I am not aware of? 

 

Thanks! :)

post #90 of 155

This has been covered way too often but basically you are better off with a Koss E.90 amp. 

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