Well, they arrived today:

Nicely protected and ready to explore:

Not a great deal of information on the box and what there is is small writing and white on a grey background and is quite difficult to read!  No info on what speakers are inside the unit nor power output etc.

Box is nice quality and each speaker is very well packaged and protected:

And everything out of the box:

After criticism of the cheap adapter systems for other products, B&O have chosen to put three power leads in the box - 1 x EU, 1 x US and 1 x UK.  Seems a waste as normally two will get thrown out.

And now unwraped from the covers:

And more interestingly, underneath:

Micro USB port, connectors to link together and presumably for any updates; mains input and what look like a future mounting options fastening/threaded section.  Possibly wall and floor mounts are coming? I can't see any other use for these?  Little rubber feet for non-slip (these will be needed as I'll explain soon!)  And the Made in China sticker.

For those wondering how big or small they actually are:

And yes, they work:

Clear and bright white indicator light (blue when pairing).  And just to show they do work:

So how do they feel, look, sound etc?

They feel very solid and quite weighty.  The polymer casing almost feels a bit like the BL3 finish - not gloss but a nice, slightly matt finish.  The grill is flawless as is the casing.  It does not feel cheap.  It feels very stable on a table and when the volume is up, those rubber feet are certainly needed!

Press the B&O logo for a couple of seconds to switch on and pair to your device.  It came up instantly on my iPad Air 2 as did the second speaker.  Then press the B&O logo for about 5 seconds on one speaker (which will be the Left, Master speaker) to start to pair the speakers.  Once the white light flashes - with a sound prompt, do the same with the second speaker and wait a few seconds.  After a sound prompt, that's it - they are paired left and right.  It all took less than 30 seconds from switching them on.

Started to play music via Deezer to them and started at a moderate volume.  First impression - WOW, that's loud and clear but a bit treble heavy.  At half volume you can hear them all around the house. When a good bass bit of music is on you can feel the casing boom - lovely.  Hence the need for the rubber feet otherwise they'd be off the table.

Stereo seperation is very, very good.  I played a bit of Deep Purple Live and the clarity of stereo and width was excellent.  As previously, I also tried Afterglow from Seconds Out Live by Genesis and again, the two drum sets are completely seperate.  It's very impressive.

I'm now playing some classical music (Mozart) which actually sound better I think than the more prog/rock type of music.  The instruments are exceptionally clear and fill the room but don't flood it.

You can of course adjust volume from your device or via the + and - buttons on either of the S3 speakers and it of course adjusts both equally.

At first I found the sound a bit harsh in that the treble or top end seemed to dominate (cymbals seem to sound forever).  After playing around with the equalizer on Deezer it was interesting to hear how much difference it actually made.  I'd suggest to not just put them on and think - 'oh, is that it?', mould the sound to your taste via the settings available.  I prefer a bit more bass than a neutral or treble tone so this worked wonders for me.  As I say, I'm now with classical and it's lovely.

Turn the volume up and they are loud!  No distortion whatsoever at higher volumes - they are very capable.  They blow the socks of the BL4's - they are not comparable at all.  For such a small speaker, in the right place, it's surprising how much sound comes out of them.  Talking of placement, there is no switch for 'corner, wall, free' etc.  What you hear is what comes out with the only adjustments being done via your source.  Spatially it does change if you angle them in or out.  Again, you'd need to play with this in your setting.

I left them unused for a while but they don't seem to auto turn off.  Maybe I just haven't left them long enough.  EDIT: the white light stays on as they are hardwired to mains.  If you press the B&O logo it switches both speakers off and the white light dims but is still on (standby).  The music you are playing is automatically paused on your device at the same time.  Switch the speakers back on again but you have to start your source music again - that's not automatic.

A new feature I found under Bluetooth for these is a 'Disconnect' option as well as the 'Forget this device'.  I've not seen that before on any of my B&O Bluetooth products.  Presumably you can disconnect one speaker and move it and use it elsewhere without it picking up the pairing of the second speaker and connect it to another source device?

If you get a chance, try them out at a dealer before you buy if you're not sure they are for you.  I'm thrilled with them and think B&O are on a winner with them.  Yes, they are hardwired to power but they aren't meant to be a portable Bluetooth speaker - we already have the A2, Beolit 12 (with a receiver as I use it) and Beolit 15 for that.

If anyone has specific questions about them, just ask and I'll try to answer.

Dave.