So even if a Bass instrument is only on the left channel through my speakers (jazz records) and the sub is wired to the right speaker it will get a signal? I am confused. How would I wire one sub into both speakers? Thanks
I am also looking at this older Naim forum thread which is not exactly clear about the optimal options either. Starting to regret having ever considered this 
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Subwoofer addition - Hi-Fi Corner - Naim Audio - Community
Apologies to de-rail the Nait 50 thread, I probably should have started a separate one.