ATOTO AC-4470 USB Dab+ radio receiver - Specified for ATOTO A6 Series

Once I'd figured out that you need to force the initial scan to pick up a signal I have been impressed with the product. So far it seems to pick up the signal well.

Works well and easy to install, just need to try and find an app that you can manage better so I can remove unwanted stations. Good clear sound and reception

Great addition to the A6 headunit. Great sound quality.

Let's get the pros out 1st, it sounds really good when you get a signal...Now the cons, terrible reception, one of the worst DAB signal receivers I've ever come across, bad doesn't even begin to describe it., Next the app is so badly designed it's laughable, the badly designed mess has zero logic to its layout and is a nightmare to try and use when driving, icons too small for lists, favourite etc and a picture on it that is COMPLETELY pointless, it features a stupid idea where hitting the top part of the selection adds or removes it from your favourite list but the bottom part selects the station -WHY??? Throw in the fact that every time you turn the ignition off the DAB software closes and when you open it you have to tell it to use the usb connection again - again WHY????Been waiting months for this extra to arrive, ATOTO have completely screwed it up - avoid this and the A6 if you want DAB in your car, it's an absolute joke!

This DAB antenna works well with the Atoto A6. I am impressed

Works with no issues when attached to the unit.

This review applies to the UK where DAB coverage is GROSSLY inferior to FM.Additionally I work in communications systems technical design so there will inevitable be some bits of what follows that will only mean things to fellow techies - sorry - can't please them all, all of the time!When I first got the Atoto A6 I didn't buy the DAB module . Instead, I used an RTL-SDR module. with a couple of third party apps. and an external passive antenna. I did this because I already owned the hardware and software packages and I know how sensitive the RTL dongle actually is (very - just not very selective)That third party software wasn't well integrated and really designed for phones. Although it worked on the A6, it didn't make good use of the atoto screen real estate and was FAR too fiddly to use when driving.SO...I invested in the Atoto DAB module. It plugged straight in, and seems to work on all USB ports except the quick charge one. The software was appreciably better integrated as you would hope, but like most DAB receivers, the solution relies on an amplifier stage which is built into the antenna (the black brick) to give it performance.There's no nice way to say this - on glass antennas for DAB <seriously> suck! and have an appallingly short mean time between failures! I had already fitted an outboard passive antenna for DAB, but there was an issue - the power for the antenna amplifier is fed up the co-ax so if I'd wired it directly there would have been 3-5V appearing on the metal rod of the antenna (not good).I was about to build a circuit called a Bias-Tee that blocks the volts to the antenna when I discovered that the RTL-SDR Blog people also sold a wideband amplifier (LNA) that fitted straight between the dongle and the outside antenna. It costs under 20 quid and would power itself directly from the atoto dongle!so I invested in one. (hint: technofix in the UK)finally I wrapped the whole solution chain (bar the antenna cable) :ATOTO A6 ------USB LEAD-----DONGLE----LNA-----ANTENNAin a fabric tape to stop it detaching behind the dash whilst on the road.Near perfect performance now! From my home In South East Wales I can hear all the national DAB MUXs , plus my local south wales one , plus both Somerset and even Devon / Gloucestershire locals from some locations.There are still holes in coverage - but they are in the main caused by the fact that DAB signals don't always radiate from the same radio masts as their FM counterparts. But that isn't an issue of the Atoto unit.Unlike other stereos there is no ability to "hop" between FM and DAB in DAB coverage holes and you do get the "R2D2" effects in weak signal areas (rather than muting of the audio ) - that can be fixed in a future release of software if Atoto choose to do so.Additionally, there is an alternative 3rd party application called (if memory serves) DAB-Z which works with the Atoto module and is easier to navigate / use on the road than the supplied one. It does take longer to start up, but I accept that as a limitation now.What would it take to make it a 5 star review?The supplied DAB app (in fact nearly ALL the DAB apps - DEVS PLEASE NOTE!!) require an [X] button adding to close it on demand - you cannot rely solely on the "back" button when other audio progs are running in the background. When you run DAB on a phone shutdown occurs the moment you unplug the module - but on a car stereo the module is probably inside the dash so that isnt going to happen . its a relatively new use-case that all Android DAB app developers need to think about !The receiver module sensitivity without the antenna needs to be better - But its shortcomings were addressed "plug and play" with the RTL-SDR Blog LNA and a decent (Panorama) external antenna boosting the signal by around 19dB! (best performance happens with an antenna cut for a 1/4 wave at 186 MHz - makes NO sense but trust me I went through the pain so you don't have to ! )I hope the above helps!Incidentally, I upcycled the RTL-SDR dongle with a second RTL Blog LNA (a small hardware mod was needed on the RTL Dongle because the android driver doesn't support the built-in Bias tee (come on Martin! :-) ) and it now receives DVB-T2 (freeview) television which the Atoto didn't support natively!

Good bit of kit works brilliant good reception 👍