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.
@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.