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DiMora
230
Oct 22, 2018
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The stock tubes are Shuguang Chinese Military tubes with aluminum bases. They are not bad tubes at all. Shuguang has been around since 1958. The power tube (big one) is a 6N5PJ which is exchangeable with a 6AS7 and the pre-amp tube (little one) is a 6N8P which is exchangeable with a 6SN7. The biggest impact on your sound will be with swapping the pre-amp tube. I'm trying electro-harmonix, RCA, Tung-Sol and GE new and vintage New-Old-Stock (NOS) tubes to see what I like in the pre-amp tube position. I am using a Russian "Winged C" 6H13C/6AS7 big power tube now. My electro-harmonix took 150 hours or burn-in for the internal tube-getter to rid itself of the L channel hum. My Tung-Sol out of the box has a lot less hum and I am beginning burn-in later today. Will report back as I roll more tubes. Check out the Shuguang tube factory footage here: https://www.youtube.com/watch?v=U70-VcmiUM0
Oct 22, 2018
DiMora
230
Nov 2, 2018
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Now I’m running a Sylvania “ Bad Boy” 6SN7GT, an RCA 6SN7GTB and a GE 6SN7GTB as my pre-tubes (the small one). I like all three of those better than either the Shuguang (OEM) or the Tung-Sol and the Electro-harmonix. The RCA is awesome and the Sylvania has very good bass. I also picked up an NOS RCA 6AS7G from 1953 that sounds great.
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Nov 2, 2018
Horseknight
159
Nov 3, 2018
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Hi! good evening. Thanks for sharing your evaluation on these tubes. I will follow your suggestions and try some of them.
Nov 3, 2018
DiMora
230
Nov 3, 2018
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By the way, I have 4 sets of headphones I've tried so far on the Darkvoice...Massdrop HiFiMan HE-4XX, ESS 422h and ESS 252, and Sennheiser HD-6XX. Hands down, the HD-6XX sounds the best on this amp, particularly with the NOS RCA, GE and Sylvania tubes I have mentioned. I like the Sennheiser/Darkvoice combo better than my Schitt Asgard 2 with any of the aforementioned headphones. Solid state can be very good, but this setup is amazing. I have some Mr. Speaker headphones on the way as well as the Koss Electrostatics...but so far, the the Senn/DV combo is undefeated!
Nov 3, 2018
DiMora
230
Feb 17, 2019
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Update: I had one of two Darkvoice 336SE's lose the R channel. Unit is only 3 months old. Massdrop says tough luck - it's only covered for 30 days. I must say - you need to use caution before you buy one of these in case it dies shortly thereafter. I think you should at least be able to RMA a bad unit for a good one for the first year of ownership...not the tubes...but the amp itself should be covered. Maybe 30 days on the tubes since they're a consumable.
Feb 17, 2019
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