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Woo Audio WA22 Amp Owner Unite
Oct 17, 2020 at 6:13 PM Post #931 of 2,688
Going back to wa22, i have finally bought mine. It really looks impressive. I got it with Jan Phillips 6080, GE 6sn7 and Chinese 5u4g. I find the sound too bright with my lcd3f. I can also hear a hum noise a bit. The Chinese 5u4g clearly deteriorated the sound. Since i put Sophia 274b the sound become much better. I am waiting for 6sn7 rytheon/tung sol/rca to do a tube roll a bit. I also bought rca 5u4gb.

i am going through a couple of threads here on tubes for wa22, but would appreciate any suggestions for warm sound set of tubes.

20201016_220302.jpg
 
Oct 18, 2020 at 11:58 AM Post #932 of 2,688
bpiotrow13 said:
Going back to wa22, i have finally bought mine. It really looks impressive. I got it with Jan Phillips 6080, GE 6sn7 and Chinese 5u4g. I find the sound too bright with my lcd3f. I can also hear a hum noise a bit. The Chinese 5u4g clearly deteriorated the sound. Since i put Sophia 274b the sound become much better. I am waiting for 6sn7 rytheon/tung sol/rca to do a tube roll a bit. I also bought rca 5u4gb.

i am going through a couple of threads here on tubes for wa22, but would appreciate any suggestions for warm sound set of tubes.

Click to expand...
Ecc35/33, 422A, 421A/5988/Bendix 6080wb/GEC 6AS7G

Sorry, you don't have too many choices.
 
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Oct 18, 2020 at 2:14 PM Post #933 of 2,688
The Langrex 5AU4 was recommended as a cost-effective substitute for the pricey Sophia 274. I like these on my WA22. Using RCA black plates for the 6SN7 and Mullard 6080.
 
Oct 18, 2020 at 3:11 PM Post #934 of 2,688
attmci said:
Ecc35/33, 422A, 421A/5988/Bendix 6080wb/GEC 6AS7G

Sorry, you don't have too many choices.
Click to expand...

Thanks, these are mostly 6as7g substitutes. I think i have GEC 6as7 g, need to look for it. Can you recommend warm 6sn7?

davehg said:
The Langrex 5AU4 was recommended as a cost-effective substitute for the pricey Sophia 274. I like these on my WA22. Using RCA black plates for the 6SN7 and Mullard 6080.
Click to expand...

Thanks, i have managed to buy sophia with significant discount. I have ordered rca 6sn7, so will try. Is mullard 6080 warm? I have heard it is bright.
 
Oct 18, 2020 at 3:21 PM Post #935 of 2,688
bpiotrow13 said:
Thanks, these are mostly 6as7g substitutes. I think i have GEC 6as7 g, need to look for it. Can you recommend warm 6sn7?



Thanks, i have managed to buy sophia with significant discount. I have ordered rca 6sn7, so will try. Is mullard 6080 warm? I have heard it is bright.
Click to expand...

How is the performance of the amp? Any issues?
 
Oct 18, 2020 at 3:45 PM Post #936 of 2,688
arftech said:
How is the performance of the amp? Any issues?
Click to expand...

No issues. A bit hum at the beggining, but i guess it is because of the tubes (unused). It is quiter now. I hope it will improve more, but it is acceptable even now.

I have bought the amp second hand, but it looks as almost unused.

Any particular reason you are asking about issues?
 
Oct 18, 2020 at 3:53 PM Post #937 of 2,688
bpiotrow13 said:
No issues. A bit hum at the beggining, but i guess it is because of the tubes (unused). It is quiter now. I hope it will improve more, but it is acceptable even now.

I have bought the amp second hand, but it looks as almost unused.

Any particular reason you are asking about issues?
Click to expand...

A few threads back there was talk about the hum and the lack of support from Woo.

How are you liking how it sounds with your headphones?
 
Oct 18, 2020 at 4:08 PM Post #938 of 2,688
arftech said:
A few threads back there was talk about the hum and the lack of support from Woo.

How are you liking how it sounds with your headphones?
Click to expand...

The hum is not loud and is quiter than at the beggining. Strange thing is that it is louder when you hear the amp itself, than over the headphones. I suspect the new tubes here and that it will improve. As mentioned i have bought the amp as used.

I have audeze lcd3f. The sound is good, but a bit too bright. I am looking for detailed but warm sound. This is why i am looking for the right tubes. I replaced the Chinese 5u4g with Sophia Princess which improved the sound much. I have a few pairs of 6as7g/6080, but need to wait for additional 6sn7 (i ordered rca/raython/tung sol). In any case it is a pleasant process to tube roll a bit:wink:
 
Oct 18, 2020 at 5:11 PM Post #943 of 2,688
attmci said:
It's very expensive. The attached is the best reference thread for the rectifier tubes.

https://www.head-fi.org/threads/dub...mparison-rectifer-tube-rolling-thread.694525/
Click to expand...


Rectifier tubes is another deep pit for your money, some of them can be very expensive.

I still hold the belief (thou many would disagree) that we should go SS rectification in tube amps and not to waste money on rectifier tubes. I know rectifier tubes also have a significant impact on the tube amp sound, but the thing is the rectifier tube is not in the signal path, it only converts AC to DC in the amp. The sound difference from rectifier tubes is not caused by changing the audio signal directly, but rather possibly by changing the operating points of driver/power tubes in the circuit. If we can have an excellent SS rectification that ensures perfect operating points on the driver/power tubes, then the amp should sound as good.
 
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