The speakers connect directly to your PC or Mac, desktop or laptop computer’s USB port via its mini-USB input located on the left speaker; the right channel signal is then routed digitally from. My guess is that Stereophile & Audio's great reviews were influenced by B&W's big ad budget. Maybe great for computer speakers, but for real music, I'd look elsewhere. 2 stars for value b/c they're expensive for the sonics you get, 2.5 stars overall b/c they do look neato! Review: KEF X300A Wireless Digital Hi-Fi Speaker System - Linear White (Pair) Hardware: Mac Pro Tower (Mid 2010, 16GB, all SSD storage), OS X 10.11.6, iTunes 12.7.2.58, and Pure Music 3.0.6 I was looking for a replacement for the Bose speakers attached to my Mac in my office.
I'm going to make multiple replies in one post. First of all, the name calling is getting old. It really shows who the REAL trolls are. The KEF LS50s are NOT studio monitors. What kind of studio would that be if you have to listen to the speakers at a one foot distance to get any realistic output? Are you going to use them as headphones?
These are nothing more than overpriced (and yes, well measuring) computer speakers. If they are sitting right in front of you, next to the monitor, then they might work. But that's not something that I would call a studio.
More like a bedroom with a pretend sound engineer in it. The THX spec says that the system must provide 85dB at listening distance, with 20dB of headroom. A real studio should be able to mix movie soundtracks as well as music. If the speaker cannot provide a reference level at the listening position (which varies),then it's not a studio monitor. It's an expensive toy. You guys make it seem like hitting 85dB at a listening position with 20dB of headroom is some impossible task.
Tons of THX and non THX speakers on the market can do it with easy. You don't need floorstanders to reach this goal. Here's a simple THX certified monitor, with two 5' midwoofers, which can do it if crossed over at 80Hz high pass. You can buy it on Amazon for $250 each!
It should measure (and probably sound) even better than the KEF LS50, because the THX spec calls for +/-1.5dB frequency response and they have very strict requirements for off-axis response. No crossover, or driver selection cheating there.