Woo Audio WA22 Amp Owner Unite
Sep 20, 2022 at 9:55 AM Post #2,041 of 2,694
Woo gives a rating of 1.5w at 32ohms. I’m curious about anything lower. How does the HE-5XX sound?

I’ve listened to the Aeon 1,2, and Ether 2 through a OTL amps, in the past. The result was that low volume sounded fine, but as you went up the dial, the treble became screetchy and the bass sounded like a blown woofer.
They sound great to me, I've had no issues with distortion or lack of volume. Something more power-hungry like the Susvara would be an issue though.

HE-500 sensitivity is 89dB
HE-5xx sensitivity is 93.5 dB

I always use planars on the lo setting for low impedance.

You can also get some 5998 or 7326 power tubes to up the output power to about 2w.
 
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Sep 20, 2022 at 2:05 PM Post #2,042 of 2,694
I use LCD-4z (15ohms) LCD-X and LCD-XC(20 ohms). There is plenty of power to drive them, even with the 6AS7 or 6080. I listen LOUD and use -3db headroom compensation in Roon. With the stock drivers I never exceed 2 o'clock on the volume dial. With 7236 or 5998 I usually am at 11-12 o'clock on the volume dial.
 
Sep 27, 2022 at 10:20 PM Post #2,043 of 2,694
Damn that tube glow is pretty! I'm really enjoying Taj Mahal An Evening Of Acoustic Music on the WA22 and ZMF Atrium! I've had my Wa22 for 6 months and it's still the best decision I've made in this hobby! Definitely after upgrading from the stock tubes!
 

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Sep 27, 2022 at 10:47 PM Post #2,044 of 2,694
I use LCD-4z (15ohms) LCD-X and LCD-XC(20 ohms). There is plenty of power to drive them, even with the 6AS7 or 6080. I listen LOUD and use -3db headroom compensation in Roon. With the stock drivers I never exceed 2 o'clock on the volume dial. With 7236 or 5998 I usually am at 11-12 o'clock on the volume dial.
It helps, also, that the sensitivity of the ‘4z’ and of the ‘XC’ are 98 dB/mw and 100 dB/mw. These are quite high values: the two headphones are quite ‘efficient’.
 
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Oct 7, 2022 at 12:51 PM Post #2,046 of 2,694
I just built a 3 pin XLRs to a 4 pin XLR female adapter, so i can use both balanced plugs on my WA22 to compare headphones.

PXL_20221007_154122135.jpg
And did you find any difference in performance?
 
Oct 7, 2022 at 1:19 PM Post #2,047 of 2,694
And did you find any difference in performance?
No, there is no difference in performance because they are both balanced. But it is very convivence for A/B test, if you have 2 of the same headphones one is modded or one has difference earpads. I have 5 pairs of ZMFs and some are modded, it makes very easy for me to compare with one amp, more accurately instead 3 or 4 amps.
 
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Oct 7, 2022 at 1:24 PM Post #2,048 of 2,694
No, there is no difference in performance because they are both balanced. But it is very convivence for A/B test, if you have 2 of the same headphones one is modded or one has difference earpads. I have 5 pairs of ZMFs and some are modded and it makes very easy for me to compare with one amp, more accurately instead 3 or 4 amps.
Absolutely. I did the same A/B test. No difference, but I still use the left / Right Dual 3Pin mainly because of the aesthetics. I like it. I use an adapter like you. It is absolutely fine. :wink:
 
Nov 20, 2022 at 9:01 PM Post #2,049 of 2,694
So, I have noticed that when my WA22 is on, it will sometimes make a high pitched ringing sound. I'm not talking about through the headphones, but the amp itself seems to be emitting this noise. It can be quite noticeable when I take my headphones off and can hear it in the room.

I can fix this by turning the amp off and back on again, but I was just wondering if anyone has an idea as to what might be causing this, and what I can do to maybe stop this from happing. A minor annoyance, but an annoyance nonetheless.
 
Nov 20, 2022 at 9:03 PM Post #2,050 of 2,694
So, I have noticed that when my WA22 is on, it will sometimes make a high pitched ringing sound. I'm not talking about through the headphones, but the amp itself seems to be emitting this noise. It can be quite noticeable when I take my headphones off and can hear it in the room.

I can fix this by turning the amp off and back on again, but I was just wondering if anyone has an idea as to what might be causing this, and what I can do to maybe stop this from happing. A minor annoyance, but an annoyance nonetheless.
I have the same issue. Doesn't bother me though; I have a feeling it's from the tubes.
 
Nov 20, 2022 at 9:18 PM Post #2,051 of 2,694
So, I have noticed that when my WA22 is on, it will sometimes make a high pitched ringing sound. I'm not talking about through the headphones, but the amp itself seems to be emitting this noise. It can be quite noticeable when I take my headphones off and can hear it in the room.

I can fix this by turning the amp off and back on again, but I was just wondering if anyone has an idea as to what might be causing this, and what I can do to maybe stop this from happing. A minor annoyance, but an annoyance nonetheless.

I have the same issue. Doesn't bother me though; I have a feeling it's from the tubes.
It might be your rectifier tubes. Mine do it from time-to-time in my WA5-LE. I found shutting everything down, reseating the tubes, and firing it back up does the trick.
 
Nov 20, 2022 at 9:25 PM Post #2,052 of 2,694
Very strange and I wouldn’t call it normal. My WA22 when I had it is just silent and well behaved. Tubes shouldn’t be emitting this kind of noise. As a matter of fact, all my tube amps never emit this noise and I have been through probably 10 or more tube amps.
 
Nov 20, 2022 at 11:58 PM Post #2,053 of 2,694
I am hearing some "crackling" sounds which sounds like "static" to me whenever I am turning the volume pot on my WA22. this happens only whenever I am turning the volume pot and once I am done adjusting the volume pot, the sounds go away and music flows beautifully as usual.

is this a sign of things to come?
 
Nov 21, 2022 at 1:52 AM Post #2,055 of 2,694
I am hearing some "crackling" sounds which sounds like "static" to me whenever I am turning the volume pot on my WA22. this happens only whenever I am turning the volume pot and once I am done adjusting the volume pot, the sounds go away and music flows beautifully as usual.

is this a sign of things to come?

You should get it service. That's scratchy pot. Should be an easy fix. How old is your Wa22?
 

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