The HD660S2 with the WA3 is seriously mind-blowing. Usually, I'm using the 660S2 with my Vali 2++ at the office. But bringing them home for the holidays, the sound is way better than I thought when they're properly driven!
The HD660S2 with the WA3 is seriously mind-blowing. Usually, I'm using the 660S2 with my Vali 2++ at the office. But bringing them home for the holidays, the sound is way better than I thought when they're properly driven!
One of my "headphone regrets" is that I didn't have the right NOS tubes in my WA3 when I compared the stock HD650 to my own JAR-650 (heavily revised by Jupiter Audio Research) for a review posted here several years ago. I remember trying both on it, but it wasn't noteworthy--because I was still in the "wander the NOS wilderness" phase, which later decisively corrected when I got the Tung-Sol 5998 power tube and, with the knowledgeable assistance of @jonathan c, the absolute right input tubes.
Really wish I could hear them both on the WA3 now...
One of my "headphone regrets" is that I didn't have the right NOS tubes in my WA3 when I compared the stock HD650 to my own JAR-650 (heavily revised by Jupiter Audio Research) for a review posted here several years ago. I remember trying both on it, but it wasn't noteworthy--because I was still in the "wander the NOS wilderness" phase, which later decisively corrected when I got the Tung-Sol 5998 power tube and, with the knowledgeable assistance of @jonathan c, the absolute right input tubes.
Really wish I could hear them both on the WA3 now...
I was considering getting a pair of HD6XX just to see how they sound with the WA3. Then again, the HD660S2 sounds so impressive, way better than what I remember from the HD6XX, that I'd probably just be wasting my time.
Gents - I'm having a few issues with my WA3 - as it's getting on in it's usable lifespan.
Does anyone on here happen to have a schematic? Or, any detail on the transformer? I called Woo last week - but did not make much progress - even though this is now discontinued, so seemingly not much to worry about from an IP standpoint in sharing.
Has anyone used the triple mica 6N1P-E in their WA3? (The Russian letters look like 6H1n-E)
I've tried a couple pairs and the tube I put in the left side fails to heat up or produce any sound even when I then swap the two tubes positions. I haven't seen that with any other 6922 variants, including a pair of double mica 6N1P-E tubes. These have a higher heater current than 6922s but the manual says they're compatible. I'm starting to think there's either a problem with my amp or there's a significant difference between the double mica and triple mica 6N1P-E.
Got some NOS GE 5670 tubes and 5670 to 6922 adapters for my WA3 and must say I'm quite impressed! The bass is really strong with these tubes, almost boomy, but still controlled. Really good air up top and a nice liquidity to the sound that wasn't as prevalent with the RFT 12AT7 tubes I was using previously. Soundstage is smaller but more uniform and coherent. The RFTs had more width, but depth wasn't as good. Overall a more vivid and aggressive tube than the RFTs without being fatiguing. Really good synergy with the Atrium Closed and Bokeh. I love how they render guitars, good crunch and decay. I think I will explore the 5670 tubes more, I'm really enjoying how they sound. And they're fairly cheap as well! EDIT: Forgot to mention they have a very bright glow, which I love. Some tubes have almost none, I hate that. But these babies glow bright and strong.
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(tubes: Cetron 7236, pair Genalex / Gold Lion 6922 [cryo treated])
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