ADX Bluetooth Speaker Review

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I realised two weeks ago that I have only reviewed one Bluetooth speaker on the blog so far, so it was a happy coincidence that ADX (Audio Dynamix) got in contact last week to ask if I would like to review their latest unit, the Ultimate Edition 3.

X05-UE3 – Ultimate Edition 3

I won’t delve in to the technical specs of this specific device, there are better qualified people for that but I will say that I can’t fault the sound that comes out of this device.


The device is made from a smooth silver aluminium with a rubber base and back, a metal grill up front and a plastic carry handle that folds away nicely.


On the top you’ll find all the function buttons of the device, in addition to the standard play/pause, skip/back, on/off and volume buttons you will find an equaliser button that enhances bass, midrange and treble frequencies.

I was amazed at how the equaliser actually made the music sound better, with no noticeable distortion.

One frustrating problem I did find with the device is that the buttons are very black, as demonstrated in the photo above, and it is very difficult to see the button icons.

I really struggled to see which buttons I was pressing but this should be an easy fix for ADX.

Cable Management

It’s not a known fact, but devices without Bluetooth capabilities still exist and in these cases it’s nice to have a jack cable hanging around.

ADX decided to tackle this problem by including a ~40cm audio cable built into the back of the device, it also comes in handy when running low on power and you want to avoid using Bluetooth.


The device otherwise includes a 2600mAh lithium polymer battery that claims approximately 10 hours Bluetooth playtime from a single charge, I have found that this varies depending on the sound volume.

A full recharge of the device takes a few hours via the micro USB cable provided.


A new CSR8635 Bluetooth version 4.0 chip makes pairing really simple, after turning the speaker on, the LED on top blinked orange meaning it was ready to pair.

I found and paired with ‘X05-UE3’ in my iPhone Bluetooth menu, the connection was nearly instant.


I was happy to find that there was absolutely no noticeable lag between the phone and the speaker, actions on both devices, such as skipping a song, were executed instantly over Bluetooth.

ADX claim that the Bluetooth connection should stay strong up to about 20m but naturally indoors and through walls I found it to be significantly less, but that was to be expected.

I’m sure that outside the range will increase, but its cold and I don’t feel like stepping out.

Final Thoughts

Overall, I really like this speaker, there are a few improvements that could be made but to be honest there is no ‘perfect’ speaker on the market at the moment.

I have been generally impressed by the sound quality of the speaker, especially the preset equaliser and I will be adding the device to my Christmas 2015 Gift Guide.

You can find the speaker on Amazon for £44.99, in either blue or grey.

If there’s anything I’ve missed then just leave your question in the comment section below or give me a shout on Twitter.