Subwoofer for Kef LS50 Wireless II?

I have a pair of the ls50 wireless II with a Kef kc62 sub and the wireless sub tx/rx kit. I use it in a tv room in lieu of a sound bar. Works wonderfully. You wont believe the kc62 performance considering its small size.

+1 fiesta75

audiocanada, Your SVS SB1000 subwoofer is capable of a some sophisticated application based equalization and Q adjustments which can be varied to taste and preset to memory. 
Along with audiorusty's crawl test suggestion the result should be spectacular regardless of source material.
Are the adjustments and positioning overwhelming?

I've used many subwoofers for public address and in home including REL.
What is REL magic?

Rel magic?.....its seemless integration to your main speakers in 2 channel audio

As far as REL is concerned, I have to agree with @missioncoonery. Using High Level Speakon connector with an after market cable is substantially better than using low level. I have tried this with several amps and speaker combinations. At least in my systems, high level is noticeably better.

@audiocanada -- I recently sold my KEF Wireless speakers (first version), and truth be told I was never satisfied with the subwoofer integration (REL T9i). I tried all kinds of configurations. My suggestion is that if you cannot benefit from the high level connection option on REL, save your money and look at other options from SVS or HSU, etc. IMO, REL’s special sauce is their high level/speakon connectors, otherwise they’re not any better than a myriad of other subs in the market.