Summary: I bought these for a transportable setup for mixing music and audio when away from the home studio. I love that they fit in a small padded duffle bag. These are actually great for making 90% of mixing decisions in a song. Of course, you won't hear very low sub bass out of these. But due to insane transient response and efficiency, these small woofers are accurate everywhere above 50hz.
Summary: Would give these five stars but there is always a better (and likely very expensive) set of speakers out there. Also nothing beats a good sub in the mix. Not withstanding these are excellent (base very good too). I combined these with a DAC and I am thrilled. I got a rocking desk. I really like these. Glad I got 'em. Hint, spread them out if space permits they will sound even better. Poor quality MP3 files detract from these and any speakers.
Summary: Bought a unit and tried for a week. Hooked up to iMac, sounded very, very muffled, lots of base, however, just does not have the clarity I was hoping for. Units are built strong and heavy. However, I think since they are attached via the audio plug and not usb, the sound suffers. They need to connect via usb and allow for change in bass and tone. Returned item, would not purchase item for the amount of money, many other better choices out there in the $299 price range.
Updated "Great and only decent stereo pair of portable Bluetooth speakers within the US"
21 November 2013
Summary: Updated 12/12/13 - so I contacted Focal in NY regarding a slight enclosure rattle that I was hearing on ONE unit (the one with the power amplifier unit) and am downgrading my review for two reasons, a: the slight rattle and b: when manufacturers blow their own horns with terms like "As I'm sure you are aware, the XS Book Wireless speakers are impressive little speakers that sound great with all kinds of music.
Summary: i bought it for 290$. i think it was released at much higher price (about 450$). at the current price, it's a real bargain. like any good speaker, it requires couple of dozens of playing hours to let the speaker "open" and get it's final sound. before purchase, i listened in a store to this focal xs vs. audioengine A5+. like comparing bmw to toyota. focal has crystal clear sound, accurate & not too dominating bass.
Summary: I bought these speakers to replace some Harmon Kardon Soundsticks that went bad. I hooked them up to a Mac Pro desktop, so they certainly weren't tested to the limits of fidelity - but, nonetheless, they sounded quite nice. However, I noticed when they weren't playing music, they emitted a fairly loud buzz. I'm not sure if this is some kind of shielding issue or what, but to me it was completely unacceptable. I returned them.
Summary: Good for computer audio with a decent DAC, but not as good as a good pair of studio monitors and amp. I had them hooked up to a VPI traveler in my study and enjoyed them quite a bit as near-field monitors. there is some background noise with these but still sound quite good regardless and for $299 are hard to beat.