AIYIMA T9PRO JAN5725 Vacuum Tube Amplifier 100Wx2 TPA3250 Stereo USB DAC Amp QCC3031 Bluetooth 5.1 aptxHD COAX/OPT HiFi Home Audio Digital Amplifiers with VU Meter(32V power supply)

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As a rule, don't forget to tell me what you use, and what do you think of the sound, and reservations if any!

A: Since power consumption is considered in the design of this machine, Bluetooth does not work when other channels are used. You must switch to Bluetooth input mode to search for pairing. The Supporting Players Now, this is important. What I have here in China are very humble (by my standards), based on a set of more than 15 years old Chinese Sansui AV system (yes, the Japanese sold the name to the Chinese company, which is now a home appliance company) which I parceled out for 2 systems (main one, System 1, in my study, where I write for you; and the much less used auxiliary System 2 in the LR) There are a few extras that I had brought over from HK long ago, the most important being Revox and Sony. The stuff I use are detailed in my previous articles (Current iteration here, with links to earlier config). After some work they sounded pretty good. After listening to the systems for years I thought I knew them well, but what happened told me it was not quite so.It seems related to a high output level limitation as it hasn't happened on most optical feeds. An xbox 360 optical played smoothly without any "skips" Please read my reply to the other reader above. Set your crossover around 100 Hz and maybe go downwards slowly to see what you like. It changes what you perceive even if your main loudspeakers haven't changed at all. Out of curiosity I tested the power consumption and sure enough the device consumes much less power once it goes into this mode so its definitely turning stuff off internally when this happens.

Issue #2 (power inefficiency): When turned on it draws close to 11W! This is with no inputs or outputs connected to it yet, which came as a bit of a (negative) surprise. I wasn't expecting that much power consumption for such a small device that was supposed to be power efficient (according to some comments I saw online). As a comparison the Motu M2 only consumes about 2W. I connected USB to laptop, without tubes or even power connection, and Windows 10 detected it right away. Seems like DAC section is operation even with USB power. These sound like a skip, but they are cyclic, and it's a drop of connectivity. I was able to see this occur on 2 different CDP-CX355 units in addition to the 2 different T9 pros.Source As I'm a classical fan I mainly use my low-end Chromebook to stream Naxos Music Library (courtesy of NYPL; described here). Here in China, especially with Jazz and Pop, I augment with Kuwo ( here) and sometimes Spotify (which requires VPN), streamed using my HP laptop running Windows (now 11). I never use my smartphones to stream. Let me remind you that I mostly stream now, but I do have some good CDs and a very good CDP (Sony), but that will not feature in Part I.