Many of you know that I've been using the Sony ZX2 has a portable player for some time because of its synergies with Campfire IEMs such as Andromeda, Ara, and Solaris 2020. The slightly higher UI was perfect to tame the bass of the Andromeda, and it's organic and laid-back presentation suited the balanced armature highs, not just for the Campfire IEMs, but basically any balanced armature IEMs. I'm not necessarily a fan of the BA sound, especially in the highs, so I look for a particular kind of presentation to time its negative traits: "hashy", "prickly", etc. The problem with the ZX2, like almost all other Sony gear (except cameras), is that Sony gave up on it. The Android on the ZX2 is so old that it can't run anything today. It's 2020, and really, I don't load up songs on portable devices anymore - it's simply too time consuming. I want stuff like Roon to work when I'm at home, or Qobuz (with its download option) when I'm on the go. This is where the Shanling M6 comes in. Unbelievably, the presentation of the Shanling turned out to be remarkably similar to that of the Sony ZX2. It's got that slightly dark and laid-back presentation. Maybe a bit less organic in the lows and slightly more incisive in the highs. The M6 worked wonderfully well with the Ara. Because the sound of the M6 is slightly laid-back, I had to adjust tips for a more shallow insertion to get Ara to more upper-mid aggressive. I do not have the Solaris 2020, but I imagine this to be a great match for the M6. Those who are familiar with the Cavalli House sound will be appreciate the M6. Like the ZX2 which required a bit of burn-in, presumably for its caps (don't think I'm odd, the Sony instructions actually say that burn in is necessary for the ZX2), I also found that the M6 required some use for the sound to open and liven up. Some of this started to occur after I ran through the battery the first time. By the second charge, it was more evident. I cannot say if it will change with more use because the battery has lasts a long time. I've literally left the unit as it without topping off the charge between each period of major use. I took this with me during a Thanksgiving visit to Texas more than a month ago, and again while in the car during my drive from California to Texas just before Christmas. Yup, I've only charged the unit twice. While I haven't used it constantly, I know I've used it on the plane and in the car for hours at a time per session, so the battery definitely seems to last a decently long time, at least with the Campfire Aras. I'd say half of the time, I either used WiFi in the terminal, on the plane, or from a hotspot. The M6 comes with three different kinds of outputs. There is the standard 3.5mm jack, and balanced 2.5mm and 4mm jacks. I have not had the opportunity to try the balanced outputs yet. I would hope for better sound quality from them as I believe there are x2 AKM DACs in the M6. There is a USB C type port for charging for plugging in as a DAC/Amp from a computer. I have not tested this from a computer as this is not my use case for this type of device. (My intention was always to use this as a self-contained device).