...One wireless be used completely passively cabled, or does the battery always need to be on? Also, can’t seem to find on any spec sheet if it’s AAC compatible or just AptX. Still absolutely love the sound of my trusty M500 and considering picking up a Space One W on sale. Thanks for any info!

Seriously considering picking up the Space One. Surprised that reviews are still so limited. M500 remains one of my favourite portables though, and I'd always wanted a circumaural version, so I'm hoping the tuning is similar. I'm certainly willing to give KEF the benefit of the doubt on these...

The M500 was a great sounding headphone. The problem for me was that it fell off my head when I leaned forward. These being over ear will hopefully be more comfortable and more stable. But in the end it really boils down to how they have implemented the ANC in regards to whether they are a...

...Design.   Space One This one is an over ear, active noise cancelling pair of headphones which is $420. It appears these are a tweaked/updated M500 (https://www.kefdirect.com/headphones/mseries/m500-headphones.html) which is on ear.  ...

  Based on SQ, I'd pay it. Having gone back and forth with the H9 now for a couple of days, if I can stick the Space One sound quality in the H9's body, it'd be a winner. The H9 is much more comfortable. The biggest issue to me with the Space One are the earpads. The pleather plus the super...

...give you the best audiophile sound possible, much better than Bose or Sony in this regard. But if you dont need the ANC and already own the M500 or the NAD5 HP50 then I think these are to similar to justify buying. Comfort wise the ear cup is slightly smaller than the NAD HP50 in the opening...

...you don't need the ANC that is much much better than any other ANC product on the planet, a sound quality that is as good as the original KEF M500 or close to it. Moving in from the ANC, if you LOVED the M500 but sold it or sent it back because it was to loose on the head or not isolating...

Picked up the Space One, and they're burning in right now. Sound in either mode is very similar to the KEF M500, which is good, and better than any Bose or other noise-reduction headphones I've been able to try. Biggest audible difference between the two modes is the slightly elevated and...

...or 600 bucks and that is not fun at all lol. I would like KEF to work indepently on their own/upgraded version of the Space One. Although the M500 and M400 was also designed by Porsche Design (confirmed by a KEF staff I talked to), I think the dedication to quality build and quality control...