High cost speakers performance can be improve just by placing C-1 between the floor and speaker as shown.
The gold piece will be placed facing up. Strong sound directional movements will be produced from the mat to the top. Even tower speaker will produce the same results.
For small speakers, placing on the stand or in between the floor and speaker stand is also OK.
Placing near wall speaker will produce the directional movement effect also.
This product is basically used for speaker, therefore placing on top or below is OK.
The charcoal products will produce its property. Balancing of the stereo sound of the low and high frequency can be achieved.
Real true vocal voice can be heard clearly. For example, mini compo speaker use will result in the above mention.