Subwoofer for Kef LS50 Wireless II?

update,I now have the KC62, long story short, perfect marriage
integration took seconds with the app, set it and forget it, no looking back
trying to resist the urge to purchase a second unit
it does not have the output capability of the SVS
app control on both units is superb, I'll never do subs again without app control, no going back, I read a blurb somewhere that both JL Audio and Velodyne will be releasing new app controlled products

the KEF's with the KC62 for the right room and music preferances is without a doubt a killer killer value in the world of two channel
the whole system is just set it and forget it excellence, I'll stop short of calling it endgame but it ticks a good many of those endgame boxes

audiocanada
update,I now have the KC62, long story short, perfect marriage
integration took seconds with the app, set it and forget it, no looking back
trying to resist the urge to purchase a second unit
it does not have the output capability of the SVS
app control on both units is superb, I'll never do subs again without app control, no going back, I read a blurb somewhere that both JL Audio and Velodyne will be releasing new app controlled products

Congratulations. Glad you got past the dissolution of your 05-14-2021 post.
By now you should have had the experience that not all media contains extra low frequency content. But when it does you've got it covered. 

I'd be very interested in that blurb about JL Audio and Velodyne releasing new control application. 

I'm also very interested in what JL Audio may have pending
Velodyne too but with an asterisk,  the real Velo was doing things far ahead of its time, curious if the new owners can do much to further David Hall's work

Perlisten's 12" offering appears in line pricing wise with JL and looks incredible
I've just ordered an SVS SB3000 just to compare against the 1000, I have a feeling it could be the sweet spot in the SVS lineup for music

back to the KC62, seems to be getting better with break in, re-positioned between the two speakers,  drivers facing forward/back
completely unobtrusive, if ever there was a living room sub this is it and still in awe of the weight on this thing, around 20% heavier than the sb1000 at half the size

quick updateswitched subs and am currently on the SVS SB3000
this change has been significant for me in my room, could not be happier at the moment,

No moss grows under your system. I'm sure the differences you're experiencing between the your original SB1000 and this current SB3000 would be of interest to many.