[zer010gic]

I am not an expert but this is how I understand it. If I am wrong someone please feel free to correct.


Quote:

Originally Posted by pzm9pzm9 /img/forum/go_quote.gif Which two would you suggest for rolling power tubes for my WA2? should it be 78/77 and 74/77? or 78/77 and 83/74 ?

My guess would be the 78/77 and 74/77 as they are closer overall.


Quote:

Originally Posted by pzm9pzm9 /img/forum/go_quote.gif what values should be within 5% in two tubes? For example, 78/77 and 83/74 , do you compare between 78 and 83?? and 77 and 74? and see if they both fall within 5%?

I always compare both numbers. Each side of the / represents half the tube. In triode tubes there are really 2 tubes in one as I understand it. I tend to check each side against the corresponding side on the other tube.

Quote:

Originally Posted by pzm9pzm9 /img/forum/go_quote.gif Also, the seller said the minimum acceptable value of his tester (TV-7D/U)is 40/40. Where did he get that 40/40 value from? why is my tubes have greater value than 40/40. Do these values indicate the expected life time of the tubes? What can I be informed from these values??

He got the 40/40 value from a reference book for his tester this tells him the minimum reading that indicates a good tube. In some ways you can hypothesis life expectancy from this number but not an exact amount of time (so I have been told)

 

[Skylab]

That's all pretty much correct. And 78/77 and 74/77 is plenty close of a match, both for the two sections of each tube, and between the tubes themselves, for use in an amp like the WA2.

 

[pzm9pzm9]

Thank you very much guys. It really helped. Whoohooo! tube rolling is going to be fun!

 

[fatcat28037]

I received my WA2 a couple days ago, It replaces my WA3+. The 3+ is a nice amp but it strained to push my GS1000, not the WA2. It handles them like a breeze. This is one great amp.

 

[shellylh]

Congratulations! I have always wanted to try the WA2.

Quote:

Originally Posted by fatcat28037 /img/forum/go_quote.gif I received my WA2 a couple days ago, It replaces my WA3+. The 3+ is a nice amp but it strained to push my GS1000, not the WA2. It handles them like a breeze. This is one great amp.

 

[xenithon]

I see at the Woo Audio website that the WA2's preamp section has been improved - gain upped to 20dB. Also mentions rubber feet with custom fit aluminum shoes come in standard. Price increased to $990 though.

 

[fatcat28037]

I would like to add a DAC to my system to place between my Marantz CD5001 and WA2 > RS1/GS1000. Has anyone used a DACMagic with the 2? If you're using something else, what is it and how do you like it.

 

[LeMat]

Quote:

Originally Posted by fatcat28037 /img/forum/go_quote.gif I would like to add a DAC to my system to place between my Marantz CD5001 and WA2 > RS1/GS1000. Has anyone used a DACMagic with the 2? If you're using something else, what is it and how do you like it.

I do use a DACmagic... I really like it and consider it's a worthy addition to my setup. I didn't listen to other dac but did listen to my system without the dac... sure there is a difference. Sound harsher, less fluid, with instruments overlapping each other. Instrument separation is what strike me the most in using a dac.

 

[LeMat]

I finally got the HD650 (so more enjoyable than my K701), but they make me wonder what can of tube I should use with my WA2 to get the maximum detailled sound. Sure the HD650 sounds way more balanced than my k701 but I'd like to retrieve the k701 clearness. I really feel they can be more resolving while remaining balanced all across the spectrum.
I also feel the sound is a bit "resonnating". Most of these flaws could be corrected with a cable upgrade but what kind of tubes would you suggest to increase the WA2 analytical power ?

 

[jamato8]

One reason the K701 appear to have more detail is because they have little bass. Take the bass away from the 650's and you will hear more detail. Also, the 650's, IMO, are not the champs at detail. They do a good job but have a bit more mellow sound.

 

[LeMat]

Quote:

Originally Posted by jamato8 /img/forum/go_quote.gif One reason the K701 appear to have more detail is because they have little bass. Take the bass away from the 650's and you will hear more detail. Also, the 650's, IMO, are not the champs at detail. They do a good job but have a bit more mellow sound.

Yes maybe the HD650 is not an analytical beast but I think I can bring them further with tube and cable upgrade. I like the way it sounds and will probably stick to it. just want to make the most out of it.
Hd650 apart, anyone could suggest a good set of tubes to make the WA2 more detailled ? I guess using some telefunken or philips could help no ?

 

[librarian]

Hi there

I've tried in this thread: http://www.head-fi.org/forums/f4/clo...0-esw9-423134/


There's a few suggestions, I'm thinking about. Now I try here. Is there a closed, circumaural, high impedance phone with a sound signature like described in the thread (highs like k501, mids like hd650 and bass like esw9) that matches well with the WA2?

What closed phones do you use with WA2?

 

[Skylab]

I posted in that thread, but a recabled Beyer DT770/600 sounds like what you're after.

 

[Anouk]

Hello, I thought i'd resurrect this thread because this seems to be the latest one about this amp. Does anyone know if there exists an online manual for the wa2? And can anyone give me the output power in mw? I am just curious.
Greetings, Anouk,

 

[Fred Flintstone]

I just ordered the HD800's today and I'm trying to figure out which amp to buy between the WA2 and the WA6 SE. I'll have to wait a month or two to pull the trigger so I'll have some time to decide. I'll be using the Channel Island amp to hold me over. Anyone have an opinion on which amp will be the best match?