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From what I have read, it is a buffer with transistor output.Is the tube in the output stage or it is just a buffer?
From what I have read, it is a buffer with transistor output.Is the tube in the output stage or it is just a buffer?
From what I have read, it is a buffer with transistor output.
I am with you on that. If I have time, I will open it and take a look....The level of distortions is pretty dramatic for a simple buffer.
It just says "12AU7 CHINA."What brand of 12AU7 is in the amp?
Based on testing I have done in the past, I am quite dubious that there is much measureable distortion difference between them. But sure, if someone wants to send them, I can test.Perhaps an ASR member who is into tubes could send you a couple of highly-rated 12AU7/ECC82 tubes to see if there is any difference in distortion.
The level of distortions is pretty dramatic for a simple buffer.
I have no pressing need for this in any way, but have an itch to buy one
yup I think so too.It looks like the tube is in the gain stage (given the output voltage swing) followed by a SS buffer output stage.
Think it is a good thing the tube is not in the DAC section which I think performs pretty well.
Like the TA-20 balanced versionOh nice, I'm surprised to see this as well! Price on this unit is pretty aggressive too. I'd certainly like to see future tube stuff measured again'st this too
Like the TA-20 balanced version
Yeah this one has an XLR output for 'convenience' with the SE output in fact going to it, the other TA-20 one has two tubes for true differential output.Oh nice! Didn't know that had that, know I'm extra curious!
Yeah this one has an XLR output for 'convenience' with the SE output in fact going to it, the other TA-20 one has two tubes for true differential output.
Let's just say 64 Ohm's should be considered as minimum you would like to drive with this, eventually try with 48 Ohm's condensator electro static hungry one's but I don't think even that would be satisfactory. For a matter a fact it's with any even remotely serious solution with tubes & twice that much with balanced one's. You can play with those headphones & add a tube feal to it through vts software (on Windows) my favourite toy of such is PTEq-X (passive EQ+ tube emulator), it's free. Those earphones are very efficient and don't need a very strong amp but they really need a very good DAC & balanced out. So forget about pairing those with tube amp & instead use software emulated one if you really insist on adding a touch of how it sounds.Hmm i see high impedance on headhone output. I guess it will probably be poor match to low impedance headphones. I want to pair of with audeze lcd xc. They are 20 ohms. Any thoughts ?