Full review here: https://wolfhawkaudioreviews.com/2023/03/16/cayin-n7-dap/
The Shanling M3 Ultra sounds great, has a fast processor and runs on Android 10, which offers a lot of versatility. It has Bluetooth 5.0, a large bright display which is easy to read and a micro sd slot to expand internal storage up to 1 TB (it will be 2TB once the cards are manufactured).
I'd like to thank Andrew from MusicTeck for answering all of my questions. He helped me pick out this unit and I am very happy with it. He and his wife Grace are very knowledgeable and willing to help.
This is by far the most incredible IEM I've ever owned. The detail, separation and sound stage are incredible. I wish I had more time to listen! My only call-out is that the size of the tubes are fairly large--too big for me to use foam tips comfortably but small silicon tips would great. If you gave small ear canals try before you buy!
The improvement on listening to music on my phone is beyond my very high expectations. The sound quality is just so much better, it has a softness that is reminiscent of vinyl. At the time of buying, Shanling only allowed their own launcher, but I managed to install a different launcher, which has made all the difference. Google Play let's you install loads of streaming, and music players, and something for my audio books. This is a Brilliant Device, and I cannot recommend it highly enough the service I received from MusicTeck was first rate. It was delivered internationally really quickly too. Five stars all round.
Quality build, sounds wonderful, Comparing with Hidiz S9 pro is in different league. Very happy with the unit after one month. One con - drains iphone battery fast, I guess it needs juice to produce this quality of sound. Using with HD660s 4.4 balanced and Final audio B3 IEM takes away brightness of B3.