Woo Audio WA6 + WA6SE: Tubes, Comments, Pictures, and Advice
May 15, 2021 at 1:55 PM Post #3,738 of 3,778

RobertSM

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I put a GZ34 mullard in at the recommendation of Brent Jesse and found it to have superior imaging compared to my NOS 1940s hanging filament RCA 5U4G. I don’t know if it’s the tube model or the tube brand that makes the difference, but a great tube nonetheless.
This doesn't surprise me. The RCA 5U4G is a little slow and a little loose in the lower mid-range and bass. The Mullard GZ34 is an outstanding tube, very tight and controlled top to bottom with incredible extension.
 
May 16, 2021 at 1:26 AM Post #3,743 of 3,778

Barnstormer13

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Thank you. How when compare with sophia princess? Its similiar with GZ34 too? Any recomendation between 274B sophia or Mullard GZ33 or GZ34? On my local store just GZ33 available and i saw cheap GZ34 on ebay
I had the Sophia Princess and ended up selling it. It was better than the stock tube, but not way better. I’d put my money on the Mullard.
 
May 16, 2021 at 12:16 PM Post #3,744 of 3,778

Odin412

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Thank you. How when compare with sophia princess? Its similiar with GZ34 too? Any recomendation between 274B sophia or Mullard GZ33 or GZ34? On my local store just GZ33 available and i saw cheap GZ34 on ebay

To my ears the Mullard sounds slightly better than the Sophia Princess 274B, but the Sophia looks way cool. I have vintage Mullard GZ37 and GZ32 and I like them both. I also have a new-production Mullard-labeled GZ34, but the vintage Mullards sound better. If you're interested in trying another new-production tube I can recommend the Psvane WE274B replica - it's excellent.
 
May 16, 2021 at 1:34 PM Post #3,745 of 3,778

RobertSM

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I wonder how the the GZ34 compares with the Brimar 5z4gy? I like the Brimar more than the Sophia.

So to my ears the Brimar 5Z4GY is warm and thick. It has a warm mid-range that is very intimate and plays very well with voice focused music.

The GZ34 I own is the metal base version. This one is Adzam labeled, Mullard made. This is the tube that stays in my amp almost all of the time. It's a very dynamic rectifier. Extremely balanced top to bottom with great extension. It has a touch of warmth but not to the point of the Brimar 5Z4GY.
20210516_102449.jpg
20210516_102406.jpg
 
May 16, 2021 at 1:40 PM Post #3,746 of 3,778

housekrl

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So to my ears the Brimar 5Z4GY is warm and thick. It has a warm mid-range that is very intimate and plays very well with voice focused music.

The GZ34 I own is the metal base version. This one is Adzam labeled, Mullard made. This is the tube that stays in my amp almost all of the time. It's a very dynamic rectifier. Extremely balanced top to bottom with great extension. It has a touch of warmth but not to the point of the Brimar 5Z4GY.20210516_102449.jpg20210516_102406.jpg
Thanks, nice to know.
 
May 21, 2021 at 8:13 PM Post #3,749 of 3,778

jonathan c

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With the arrival of 12A#7 —> 6DE7 adapters from Xuling Audio Labs, I can compare the WA6 to the WA3 with both using Mullard gold pin 6201s (12AT7 type) as driver tubes. The WA6 has a IEC Mullard GZ34 rectifier tube while the WA3 has a GEC CV2984 (6080 type). Comments will be posted.
1AE58912-3CB1-41DD-821C-9E877E510206.jpeg
 
May 21, 2021 at 10:59 PM Post #3,750 of 3,778

Barnstormer13

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With the arrival of 12A#7 —> 6DE7 adapters from Xuling Audio Labs, I can compare the WA6 to the WA3 with both using Mullard gold pin 6201s (12AT7 type) as driver tubes. The WA6 has a IEC Mullard GZ34 rectifier tube while the WA3 has a GEC CV2984 (6080 type). Comments will be posted.1AE58912-3CB1-41DD-821C-9E877E510206.jpeg
Looking forward to this.
 

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