Connectivity​ Wired:​I've been able to connect it wired to my Macbook Pro, S21, and Switch (you need to enable 16-bit for this to work) and they all work flawlessly. As with most such devices, the Qudelix-5K has a fully balanced architecture since each channel is driven by its own separate DAC and amplifier. When changing to the balanced option there is a jump in output power that is clearly audible in the louder volume of around 8dB which translates into ~15 steps in the 5K device volume scale.

Although, it is possible to see the slots and joints, these are either very small or are very well assembled and do not offer any sensation of weakness. Have it running dual connection and can use the BT from my TV (via optical TX unit) and my iPhone so can still use the app for EQ. output, capable of reaching 270mW, for 32Ω, which is a great power figure, higher than the 240mW declared. However, this decision entailed getting a completely new source, since my main players of choice up to then were: Sansa Clip+ and my phone (Xiaomi Mi 9T Pro). The treble also features a slight lift in quantity, improving resolving power and adding a but more spice to the sound of your IEM, although not by much.At the upper part of the chassis there are located the two headphone outputs and at the bottom the USB type-C port. OLED display that allows the user to configure the menus without the need to open the FiiO control application. I can safely roam through my home with no audio drops, even though I'm sometimes four walls away from the source. The 5K, on the other hand, has a high volume protection, which protects the connected headphones, when switching between different audio sources. With the Galaxy Tab connectivity is very stable and the wireless range is very good even with a couple of walls in the way, even with LDAC codec on.

It's also great to be able to simple walk away from your devices with your (presumably) high quality IEMs still connected to your ears. This is especially annoying when you have a phone connected with notifications ringing - it'll destroy the quality and I tend to deselect the Q5k as an output source on my phone when this happens. Here is a quick visual comparison of the Qudelix-5K alongside other portable DAC/amps I have on hand, including the two we saw before. And the maturity of the APP makes it very easy to have absolute control of the device, and also provides a lot of information: help, links to manuals, to the forum, technical support, warranty management.The box and its design, through a single sheet of untreated cardboard, its drawings in black ink and its schematic explanations, give an idea of a different product, where the effort is inside and not in other less superfluous things. And the disappointment was aggravated by the fact that the in-built mic sounded pretty bad, much worse than an in-line mic on a cable.