Woo Audio Amp Owner Unite

[WarriorAnt]

Quote:

Wow you are magician  if you can "pretty much take any room and adjust the acoustics" using a MCH speaker system. I sure can't do that, just changing the room size would be amazing trick.
 
I think you need to look at a different headphone rig and if you did I am sure you wouldn't make this statement"$4K I've spent on my head phone rig and compile a speaker rig that would simply humiliate the headphone rig and that price would include money spent on room acoustics" particularly if you are getting into MCH audio as I do using my headphone rig for MCH audio, but yes it would cost more that 4K.

But yes just like anything if you want to play you have to pay, no use complaining about inflation that is not going to change anything.

I'm certainly no magician but I have helped design the acoustics of a few edit suites in NYC and CT. Every room a different dimension creating a different problem.  When it comes down to it the problems are not that complex and most often similar and require just an adjustment of a basic acoustic approach.
 
I think you entirely missed the point if think I'm complaining.   Constructive and realistic criticism is not complaining.
 
Also I know some folks who can humiliate a $4K headphone rig with just $1K.  I can't do that myself but I know an ear or two that certainly can.
 
I have an professional acquaintance who built a MCH mixing suit in NYC for Sponge Bob mixes and his playback is excellent and the playback section of the  suite cost less than $4k. 
 

 

[2359glenn]

 
Quote:

While Jack is releasing some good news, BAD luck again to me.
 
Yes, it happens again on my WA5LE. I'm listening Mutter's Tchaikvosky Violin Concerto, the amp suddenly without sounding.

 I checked the Linn DS connection instantly in my laptop, no, it didn't. Then I looked at the amp, both 2 blue power lights are on, the EAT300Bs and 6SN7s are lighted up too but the EML 5U4G, they are not lighting up anymore, sign...................................

 
Now, I've turn it off and wait for it to cool down and will try if it can on and sound again. I have a spare Russia 5Z4G stock tubes on hand, if the EML cannot be lighted up  again I will try with these tubes. Hope the EML will not die so soon together while I just have a pair of Mullard being dead.
 
 
EDIT 1. Turn the amp on again but with no luck, the EML 5U4Gs are not lighting up and of course, no sound at all. Replaced the EMLs by Rusia 5Z4G and turn on the amp again, there is nothing happen in first few seconds then some blue sparks light inside the Russia tubes.

 Then the tubes light up in normal and the amp sound again. OMG, that's mean I have another pair of costly tubes went bad. I've checked with those mesh plate on the EML 5U4G, both 2 plates are quite dark in color and something like rust on it. I will checked with my invoice from Jacmusic see wheter they are still under the warranty or not. Wish me luck guys, wondering I have to hold back the purchase of the Q Cable for the LCD-2 for a new pair of 5U4G
 
EDIT 2. Just checked the invoice from JacMusic, bad bad news again and again, the warranty just expired on 22 Aug 2011,&%^&*(*&%$$#@@

 
 
I would be carful about using expensive rectifier tubes in Woo amps. I don't know about the WA5 but the WA22 uses a 330uf input capacitor after the 5U4 when a 5U4
can only handle a max of 40uf. EML will state this on there web site.
  Woo uses a timer at turn on so the cap charges through a resistor then the timer jumps out the resistor this is still not good. The timer doesn't reset right away that is why
you can't turn the amp off and right back on so if the lights blink do to the power company the rectifier will blow up. Also this is probably why your Russian 5Z4s sparked on turn on 
This is why so many rectifiers are blowing up in woo amps.
 

 

[jc9394]

If I read sillysally's comment correctly, I'm glad I made the decision not get the ECC32 and spend the money on a beta22 for LCD-2.

Another topic, got a pair TS7236 from Jack and it is cooking with the NU 6F8G, they sound great from get go.

 

[sillysally]

Quote:

Checked with Jack and he said the umbilical cable could go up to 48" without performance loss.  I'm just about ready to pull the trigger on a WA5-LE with the parts upgrade.  Still haven't decided on the tubes yet though.  Couple of questions if you guys could help, have tried searching but some of these threads are just massive.
 
1.  Is the general consensus that you can't go wrong with any combination of the EML or Sophia Princess tubes?
2.  How are the Shuguang Treasures?  Jack mentioned he had Black Glass tubes that outperformed the EML 300B at a cheaper price point, assuming he meant the Shuguangs.
3.  Any recommendations for the driver tubes?
 


 

Yes I like the EML5U4G and I am using those tubes in my WA5LE, I didn't like the Shugang Treasure CV 181-Z and replaced the with a nos matched pair of TSRP 6SN7GT (1942), I also replaced my Shugang Treasure "Black Bottle" 300B-Z with with a nos matched pair of WE300B (26/56).
 
However I did keep my Treasure 300B-Z (about 200hours of use) as a back up to my WE300B's and I do have a extra set of matched nos TSRP's 6SN7GT oval mica date code (9/1942).

 

 

 

[Xcalibur255]

Quote:

 

 
 
I would be carful about using expensive rectifier tubes in Woo amps. I don't know about the WA5 but the WA22 uses a 330uf input capacitor after the 5U4 when a 5U4
can only handle a max of 40uf. EML will state this on there web site.
  Woo uses a timer at turn on so the cap charges through a resistor then the timer jumps out the resistor this is still not good. The timer doesn't reset right away that is why
you can't turn the amp off and right back on so if the lights blink do to the power company the rectifier will blow up. Also this is probably why your Russian 5Z4s sparked on turn on 
This is why so many rectifiers are blowing up in woo amps.
 

It was said some time back that Jack had been in direct communication with Emission Labs about this and that things were supposed to be okay with the WA22 despite the input cap value.  If there were a continuing issue it would be troubling to see it go unresolved at the very least.  The information about the slow start timer is very interesting and informative btw.  Moral of the story is to have the WA22 on a battery backup perhaps?

 

[Clayton SF]

If expensive 5U4 rectifier tubes like the EMLs are always blowing on Woo amps, what kind of specs should an amp have to take advantage of the EML 5U4 and not bite the dust? I'd hate to see distributors of the EML "eating" those tubes when the amp actually wasn't spec'd out for the EML in the first place.

 

[2359glenn]

 
Quote:

If expensive 5U4 rectifier tubes like the EMLs are always blowing on Woo amps, what kind of specs should an amp have to take advantage of the EML 5U4 and not bite the dust? I'd hate to see distributors of the EML "eating" those tubes when the amp actually wasn't spec'd out for the EML in the first place.

This isn't a EML issue even tho EMLs are more sensitive then NOS. A 330uf input capacitor should not be used with any 5U4 
 

 

[sillysally]

Quote:

I'm certainly no magician but I have helped design the acoustics of a few edit suites in NYC and CT. Every room a different dimension creating a different problem.  When it comes down to it the problems are not that complex and most often similar and require just an adjustment of a basic acoustic approach.
 
I think you entirely missed the point if think I'm complaining.   Constructive and realistic criticism is not complaining.
 
Also I know some folks who can humiliate a $4K headphone rig with just $1K.  I can't do that myself but I know an ear or two that certainly can.
 
I have an professional acquaintance who built a MCH mixing suit in NYC for Sponge Bob mixes and his playback is excellent and the playback section of the  suite cost less than $4k. 
 

No I didn't miss the point.
 
Do you really think this "Sponge Bob suit" can even come close to a sound studio like what you would find at AIX sound studio's out in LA, and yes I have been there and that is were I made all my PRIR's from using there #1 room acoustics and all the rest of there high end gear along with the sound engineer setting everything up for me.
 


Quote:

 

 
 
I would be careful about using expensive rectifier tubes in Woo amps. I don't know about the WA5 but the WA22 uses a 330UFO input capacitor after the 5U4 when a 5U4
can only handle a max of 40UFO. EMIL will state this on there web site.
  Woo uses a timer at turn on so the cap charges through a resistor then the timer jumps out the resistor this is still not good. The timer doesn't reset right away that is why
you can't turn the amp off and right back on so if the lights blink do to the power company the rectifier will blow up. Also this is probably why your Russian 5Z4s sparked on turn on 
This is why so many rectifiers are blowing up in woo amps.
 

Yes I agree, that is why I have posted about being very careful using these amps if you are using a high end rectifier.
Keeping the room at about 74 degrees with good air circulation and letting the amp cool down to room temp for at least one hour before you turn it back on. Also when you are using tubes that almost touch each other imo isn't a good idea.
 


Quote:

If I read sillysally's comment correctly, I'm glad I made the decision not get the ECC32 and spend the money on a beta22 for LCD-2.

Another topic, got a pair TS7236 from Jack and it is cooking with the NU 6F8G, they sound great from get go.

You did.

 

 

[cyd2025]

Quote:

 


This isn't a EML issue even tho EMLs are more sensitive then NOS. A 330uf input capacitor should not be used with any 5U4 
 

 
yikes, even the  wa6se has a 10 uf cap as the first cap. i had to modify the wa6 by redoing the powersupply by incorporating
a 22uf cap for the first position from a 330 uf stock, just for piece of mind. why would the wa22 be using a 330 uf for the first position? amazing.
 

 

[WarriorAnt]

Quote:

No I didn't miss the point.
 
Do you really think this "Sponge Bob suit" can even come close to a sound studio like what you would find at AIX sound studio's out in LA, and yes I have been there and that is were I made all my PRIR's from using there #1 room acoustics and all the rest of there high end gear along with the sound engineer setting everything up for me.
 

No I do not think it can come close to a studio like that but with Sponge Bob they are not scoring and mixing sound for movies or anything on a grand scale, lets be realistic, it's Sponge Bob and the most taxing concern is the correct placement of sound within the soundfield.  Mostly dialogue and effects and a complimentary musical track.
 
 
 
 
 

 

[2359glenn]

 
Quote:

 
yikes, even the  wa6se has a 10 uf cap as the first cap. i had to modify the wa6 by redoing the powersupply by incorporating
a 22uf cap for the first position from a 330 uf stock, just for piece of mind. why would the wa22 be using a 330 uf for the first position? amazing.
 

This is a cheap way to reduce any 120hz hum without adding another choke in the power supply.
 
 

 

[musicman59]

Quote:

While Jack is releasing some good news, BAD luck again to me.
 
Yes, it happens again on my WA5LE. I'm listening Mutter's Tchaikvosky Violin Concerto, the amp suddenly without sounding.

 I checked the Linn DS connection instantly in my laptop, no, it didn't. Then I looked at the amp, both 2 blue power lights are on, the EAT300Bs and 6SN7s are lighted up too but the EML 5U4G, they are not lighting up anymore, sign...................................

 
Now, I've turn it off and wait for it to cool down and will try if it can on and sound again. I have a spare Russia 5Z4G stock tubes on hand, if the EML cannot be lighted up  again I will try with these tubes. Hope the EML will not die so soon together while I just have a pair of Mullard being dead.
 
 
EDIT 1. Turn the amp on again but with no luck, the EML 5U4Gs are not lighting up and of course, no sound at all. Replaced the EMLs by Rusia 5Z4G and turn on the amp again, there is nothing happen in first few seconds then some blue sparks light inside the Russia tubes.

 Then the tubes light up in normal and the amp sound again. OMG, that's mean I have another pair of costly tubes went bad. I've checked with those mesh plate on the EML 5U4G, both 2 plates are quite dark in color and something like rust on it. I will checked with my invoice from Jacmusic see wheter they are still under the warranty or not. Wish me luck guys, wondering I have to hold back the purchase of the Q Cable for the LCD-2 for a new pair of 5U4G
 
EDIT 2. Just checked the invoice from JacMusic, bad bad news again and again, the warranty just expired on 22 Aug 2011,&%^&*(*&%$$#@@

Sorry to hear about it Danny. I personally don't think it is a coincidence. If I remember correctly your ECC32 went out first and nor your EML. In both cases both tubes at the same time, right? There has to be something wrong with the amp to burn the tubes. I would contact Jack telling him all the details to see if he can direct you on what to check in the amp.
 
 

 

[Xcalibur255]

Heh, you guys are spooking me a bit with all this.  I had always figured on using an EML tube in my Woo amp, which ever one that may be.

 

[Xcalibur255]

Okay, so this gets even more interesting.....  The EML 274B wants to see a max cap value of 4uF vs 33uF on the 5U4G, making it even more sensitive.  So if my WA6 has a 330uF cap in this position why hasn't my EML tube blown up yet? 

 

[sillysally]

Quote:

Heh, you guys are spooking me a bit with all this.  I had always figured on using an EML tube in my Woo amp, which ever one that may be.

Na don't worry about it, besides you don't have a WA22.
Just make sure your amp inside and out cools down to room temp and use the right tubes. Don't forget Jack sells hundreds of these amps and after all they are hand made one at a time.