I've tested this using all three inputs, RCA, Aux, and Bluetooth. The sound is warm and the speaker seems deliberately tuned towards providing a deep bass response. I found myself dialling the bass down somewhat as a result, between 3-4 on the EQ. I feel that it leans heavily on its delivery of punchy, booming lows, sometimes at the expense of the mids and higher frequencies, again this can be mitigated through the use of the in-built EQ.Depending on your choice of music, this speaker is a great option for those looking for room filling sound in a relatively small package. I say depending on your choice of music, because the speaker really excels when paired with a good audio source, and seems targeted (little surprise given the Marshall branding) at rock, classic ... MoreI've tested this using all three inputs, RCA, Aux, and Bluetooth. The sound is warm and the speaker seems deliberately tuned towards providing a deep bass response. I found myself dialling the bass down somewhat as a result, between 3-4 on the EQ. I feel that it leans heavily on its delivery of punchy, booming lows, sometimes at the expense of the mids and higher frequencies, again this can be mitigated through the use of the in-built EQ.Depending on your choice of music, this speaker is a great option for those looking for room filling sound in a relatively small package. I say depending on your choice of music, because the speaker really excels when paired with a good audio source, and seems targeted (little surprise given the Marshall branding) at rock, classic rock, and modern music enthusiasts.That's not to say that it's incapable of providing an enjoyable experience for classical music fans however. I just feel that you have to work harder, wrangling with the EQ, correctly positioning the speaker, ideally at ear height, and providing a really clean hi-res file to get a satisfying separation of instruments within an orchestra. This is where a wired connection really shines through with this speaker — when listening to the same Tchaikovsky and Vivaldi tracks, streamed from Tidal (Hi-fi), and comparing them to a competent DAP connected through RCA or Aux, there's a night and day difference. The Bluetooth seems cluttered by comparison, the wired connection providing much better separation and a more convincing stereo illusion as a result.Moving on to a few of the shortcomings of the speaker. There is a persistent, low-level hiss that's present with all of the audio inputs. It becomes more pronounced with the wired connections at volume levels over 7, though it's really only audible from a distance of about 2 feet when no music is playing. It's basically a non-issue, though if you intend to use the speaker at low volumes in relatively close proximity to your head, just be mindful of it. I should also note that I actually returned the first speaker to determine whether this was a fault with the unit or just a quirk of the product. I can confirm that the hiss was present with both units, so full marks for consistency, I guess.The speaker also has an annoying tendency to fall asleep when left alone for a while, and then upon reconnecting will start playing your music for about 5 seconds, only to then interrupt it with the connection notification sound. I don't need to be notified of the connection; I can hear the music coming from the device. This also happens with wired connections for some reason. Something of a nit-pick, but a slight annoyance nonetheless.I appreciate that this review may seem a bit over the top and verbose for a speaker of this kind, but I really struggled to find a detailed review online that answered a lot of the questions I had prior to purchase. In short, is this a good speaker? Yes. Will it replace a dedicated stereo setup? Probably not, though it may be more practical depending on your living circumstances. This speaker has the potential to be far less obtrusive to adjoined neighbours for example, provided that you dial the bass down that is. You can also move this around the house to your heart's content; I would actually consider buying another and pairing them up in stereo, the only thing stopping me is the inability to play wired audio over both speakers simultaneously - Bluetooth only I'm afraid.I went into this doubtful that a single speaker could provide me with a satisfactory listening experience — I was wrong. I have this hooked up to a turntable, to my phone via Bluetooth, to my TV even, and, despite its shortcomings, I'm more than happy with the results. Well done Zound Industries, you've done Marshall proud. Just isolate the AC better next time and get rid of that annoying hiss, allow stereo pairing over wired connections, and you'll have a perfect speaker.

Bought from Norwich store. Wanted a bluetooth speaker with decent output to link with Spotify as my existing speakers are all a bit weak. Being a technophobe I was a bit concerned about some comments regarding the bluetooth and the need to download an app, but I needn't have worried because it all worked seamlessly and I had it working on Spotify within a couple of minutes! Sound is what you'd expect from Marshall, deep bass and strong midrange with great clarity, more like listening to hifi speakers rather than digital. And it belts out plenty of it too! It's a great piece of kit, I love it!

I LOVE this speaker. The sound quality is akin to a tube amplifier – very warm-toned. I use this primarily with my record player, but the Bluetooth pairing mode is outstanding as well. Make no mistake, this speaker is LOUD. I rarely turn it up to full volume. It fills my entire 1000 sq ft home with crisp sound that carries well. The only downside is that there is no remote, and it has to be plugged into the wall at all times. However, for a stationary speaker, this is an amazing device that I recommend to all of my friends.