Speakercable and powercord that thightens bass.

I'd try some silver or at a lower price point maybe one of the nordost cables.

vh audio airsine.

Is the blackwood a cable lifter, a component vibration isolater / coupler, or a cord?

Try this DCCA ref 1 pc,in my system, the bass is so
natural, and tight.It flesh out the bass of my system,
they are also very consistent, I tried them with
3 diferrent system,the result is amazing.They have
30 days trial.My only concern,you would probably
end up buying it.Thats what happen to me.Good Luck

Honest1 ,
Vibration devices.