Joined in 2023 
82 
63 About this deal
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. Here's the list of TOS optical outputs I have so far. Xbox 360, ASUS z690 Apex Maximus, TCL Roku Television 2 Sony CD carosels, Android TV with HDMI and Optical output. Revised 10/6/22: some more design process, including meters, added. Even if you have read it, you may want to re-read.
Other than that I think having a DAC and optical input is great (obviously at this price its a cheap DAC) - though I couldn't hear anything obviously bad. I had a few devices plugged in (and Volumio Mini PC via DAC) and Airport Express (via Optical) and a Turntable via RCA and it was great to be able to switch with the provided remote control. Where is the Factory The factory (in Guangming, 光明) is operated by Mr Liu’s friend, about an hour away in SZ from the headquarter. Mr Liu forwarded a few pics of the factory, but I hope to visit it personally soon. Q: Why does the volume of the machine remain the same, but the sound level is different when connecting to different audio sources (for example, connect a CD first, then a mobile phone)? DAC A6 uses ESS SABRE ES9038Q2M as decoding. It's widely recognized in the high-fidelity audio industry, providing extraordinary music quality and lower total harmonic distortion (THD) levels, and are the gold standard of audio performance.In For One to Love, Cecile McClorin .Salvant sings an absolutely ravishing Le Mal de Vivre (original Barbara). She gives a completely new dimension to the song. The subtle use of inflections in her perfect French tests microdynamics. In general I like the sound of the T9 Pro more, although on tunes with a fair bit of "reverb" already in the original recording, it might feel a bit too much on the Aiyima and I'd prefer the Motu's flatter response.
None of this has repeated when connected to anything other than the following Sony CD Carousels. The amps work fine when connected to each of the CD carousels via the RCA Editor's Note 2/2/23:Readers may be interested in this Video of the Making of Aiyima T9 Pro. It shows in detail how an Aiyima product is made. Note the "Triple Threat" Unitek USB cable (brown). Below it is an improvised folded paper spring clip to secure the loose fitting PS plug. To the right generic cable for hooking up to the electronic keyboard. To the left of the T9, the diminutive Meridian Explorer. Far left is the MIT cable and 3.5mm adaptor used in Round 2.BTW, I have Aiyima A07 pro running with Elac Debut 6 Floorstands, haven't had any issues with it which made me think for another Aiyima product.
Aiyima T9 Design At the heart of the T9 is the AC6926C Bluetooth chip, which besides BT conversion performs all control functions (volume, tone controls, selector and relay). Digital Inputs go through the MS8412. The 6K4 tube is basically a buffer (the Aux Out does go through it). Amplification functions are carried out by first the NE5532 and, of course TPA3221 chips.Being an electronics engineer (and one with a conscious for power efficiency), I had to include this :-) It's also where I'll spend more time, because it's where it surprised me more (and on the negative side). Editor: Regarding Length This article is very long ( Covid Revenge Review?), as per my usual style when testing things I am interested in, especially things that can be used in multiple ways. Regular readers and experienced audiophiles will more likely find the many details along the way interesting. However, the vast majority of readers, usually referred here by a Google search, may want to skip here and there, or even just go to the end for Impressions, Comments and Thoughts. Regarding Organization In contrast to my usual ways, Music Used and my descriptions of the rights and wrongs will have a shaded box near the end, and there shall also be a little Technical Info near the end.
Great Deal 
New Comment