With the Lunix 4K, the Qviart brand from Spain has placed its second 4K-capable set-top box with the Enigma2 operating system on the market.The device is also available in many German shops at a price of around 140 euros.We took a closer look at the model.The Qviart Lunix 4k comes in a neat-looking multi-colored box that suggests a modern, powerful box.The scope of delivery includes the box itself, the signal generator, an external power supply unit and the HDMI cable.A special feature of the box catches the eye immediately after unpacking, the compactness of the device.The Lunix 4k is advertised in many online shops as the smallest receiver with Ultra HD reception options.It is debatable whether it is, because the Hitube 4K and the new Anadol Multibox 4K are also very small.One box is higher, the other wider, the third deeper.It is therefore immaterial who ultimately wins the race for the smallest box, because all three are mini.But what makes the Lunix 4K special and is obvious at first glance is the device's CI slot.This is a rarity in the price segment under 150 euros.The box reaches us with a slimmed down version of an OpenPLI image.Plugins can only be installed with great effort with this "factory image", and the overall performance of the box cannot be tested in this way either.We therefore decided for the test to switch to the OpenATV 6.3 image, which is popular in German-speaking countries and is available for the Qviart Lunix 4K.The image installation is done via a USB data carrier.The box with OpenATV is available just a few minutes after the update.The installation menu does not reveal any surprises, the video resolution is available as the highest level 1 080p.Tuner and Internet can be set up as usual, and a preconfigured channel list for satellite reception is also integrated.After the first start, however, it is noticeable that a multi-boot system, as offered in comparable boxes, was omitted.It's a pity, because only one image can be used at the same time - apart from tinkering solutions like OpenMultiboot.The somewhat cramped memory with one gigabyte of RAM and only 4 gigabytes of flash could be a reason for this.The box is fast in everyday mode.Compromises only have to be accepted if a selected station cannot be received.In this case, we notice a slight sluggishness in the operation of the receiver.The menus can be called up quickly.When zapping, the box boasts switching times of between one and 1.25 seconds for free-to-air programs.The program guide can also be called up without delay.The user can also choose which view he would like to use.In addition to the preset multi-channel view, a single-channel EPG is also available.If you want it more comfortable, you can also use special program guide plugins and thus get additional editorially prepared additional information.As usual with Enigma2, timers can be programmed from the EPG.It should be noted that it is advisable to set the lead time and follow-up time individually in advance in the settings menu of the box.The receiver then automatically attaches this to each timer.This way you can be sure to record the entire program even with the private broadcasters.In addition to the recording itself, timeshift can also be used.For the automatic timeshift, however, a plugin must be installed.An external USB data carrier or a network hard drive is essential to be able to record with the Qviart Lunix 4K.Unfortunately, the mini receiver does not have an SD card reader.Let's get to the heart of the box.The integrated tuner has its strengths especially in satellite reception.DVB-S2x reception is undoubtedly one of these.Multi-stream reception is also very reliable with the small receiver.Thanks to the high sensitivity of minus 87.5 dBm, even weak satellite signals can be received with the device.It's a bit of a shame: the Qviart doesn't support the blind scan function, although the integrated tuner AVL6261 (same model as the Edision Mio 4K) supports this hardware.The driver developers at the manufacturer should therefore lend a hand again, especially with the reception properties.No compromises have to be accepted when it comes to DiSEqC protocol support.All DiSEqC configurations and Unicable support are available in the menu.In the test, we did not diagnose any weaknesses in the combination module for the additional reception of DVB-C or DVB-T2 signals.Good thing: This tuner is listed as tuner 2 and can also be used for recordings independently of tuner A.Of course, independent streaming to a tablet, PC or smartphone is also possible with the help of this Tuner B module.As with every Enigma2 receiver, the prerequisite is that the corresponding app is installed and both devices (tablet and receiver) are in the same home network or the box is released for external streaming.A major shortcoming of the Lunix 4K is also the non-support of virtual tuners. The corresponding plugin can be downloaded, but it breaks off with an error message when it is run.This states that the device currently does not support the function.A real special feature is the box's CI interface.Most of the devices in this price range and size have to do without them and are therefore very limited when it comes to Pay TV reception.Qviart has given the Lunix 4K such a slot.The small Lunix4K can convince in many places.If you are looking for a Linux digital receiver for classic satellite reception and can therefore do without blind scan and satellite IP, the device is a very good helper.In the test, the box impressed with its speedy operation and stability.It's a pity that the device isn't yet perfectly suited for satellite freaks due to the missing blind scan and the satellite IP support.