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citysinz
33
Jun 16, 2020
'Wrong power chord' needs to be flagged and corrected before the next drop for shipments to USA. On the positive, replacement tubes (12AU7 / ECC82, matched pair) recommended by the drop community arrived safely and look like they will replace the TA-20 China factory tubes perfectly. I cannot speak to Balanced or any other peformance expectations just yet, due to the power chord situation.
Kris2014
65
Jun 18, 2020
citysinzGet 12BH7 for it. Those are much better than any 12au7.
Pharmaboy
60
Jun 20, 2020
Kris2014What kind of 12BH7, specifically? And do they require an adapter? (thanks)
Kris2014
65
Jun 21, 2020
Pharmaboy12BH7s are drop-in replacement for 12au7. If you don't want to try your luck with NOS tubes, EH 12BH7 is decent for less than $20.
citysinz
33
Jun 21, 2020
Kris2014Thanks!
Kris2014
65
Jun 22, 2020
citysinzYou are very welcome. I however suggest you to steer away from NOS tube on this model, as sources for good ones with low prices kinda dried up.
citysinz
33
Jun 27, 2020
Kris2014Ordered new 'gain matched' pair of EH 12BH7 gold pin to try next. Looks like the Drop TRRS 2.5mm Headphone Cable just shipped for the HD 6XX, so I will compare with the following DACs (connected to 'BALANCE IN'):
  • XQ-50 PRO (via BlueTooth 5), May 2020 Drop.. unit has NO VOLUME control..
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  • DX3 PRO (via BlueTooth 4), June 2019 Drop.. so not v2.0 :-(
Waiting on Hart Cable to ship the 4-Pin Mini XLR (Female) Balanced Headphone Cable for the DT 177X GO, May 2019 Drop.
pshanks01
63
Dec 10, 2020
Kris2014Depends on what you mean by low prices. They aren't as cheap as new production, but that's to be expected. I just received a matched pair of NOS Brimar 12AU7's for what I think is a very fair price. Got them in advance of taking delivery of the TA-20 in the latest drop. Fingers crossed about the power cord, and looking forward to listening with my HD6xx's.
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