The next best Tweak ???

Sgr, Yes, instead of hooking the wire from the negative side to the negative terminal on your speakers. Take that wire from the battery and solder it to an RCA on the ground side only. Then just plug it into any open RCA on your unit.

I think the Synergstic and the Audioquest are applying small voltages to the ground. In this tweak we are just using the negative electrons as storage.
Read up on the Audioprism Ground Control, that will explain the concept better than I can.

Hi Folks -
Was shopping on Parts Express for some caps. Saw some 10000uF but from the pix, not obvious how to tell poles. Submitted a question that got the following answer. Thought it might be helpful to post. Apparently not all caps are "polarized". From the little reading I did, a cap intended for use in an AC circuit can't be. At any rate hope the below is helpful. (it does confirm some of the info previously posted in this thread)

From Russ at Parts Express -
"If a capacitor is, indeed, polarized, then there are a few different indicators you can look for. If one lead is longer than the other, the longer lead will be positive, the shorter will be negative. You can also look at the end caps, the positive end cap will generally be black plastic, rubber, or some other insular material, while the negative will typically be aluminum. Many are also marked clearly, with plus and minus, or an arrow pointing from positive to negative, or a stripe on the negative side. The capacitor in question here is an electrolytic capacitor, non-polarized."

Ghosthouse , Yes, Electrolytic Caps seem to be all polarized. That is the type of Cap used in this tweak.
I am now using a 10K 50V Electrolytic Cap on my speakers. Parts Express has limited selection. Digi-Key is a good source.

Ozzy - In the last line, it seemed to me Parts Express was saying all electrolytic caps are NOT necessarily polar.

Either way, non-polar or polar and properly connected - does it matter?

The tweak is using only the negative side of the battery because of the electron flow.
But, I really dont know if it matters because all I have used is the polarized caps.