Now, duplicate the layer Top Circle 02 and rename the duplicated layer to Top Circle 03.
Erase the style and scale the layer down to 80%.
Then enter the Layer Properties.
And here's what we got.
Duplicate the layer Top Circle 03 and rename the duplicated layer to Top Circle 04.
Erase the style, scale the layer down to 80% and color it in #D8D8D8
From now on, simply use the layers of the bottom speaker.
Duplicate the layers - Circle 07 - Circle 10 and merge them down.
Rename the merged layer in Top Circled Group and scale the layer down to 65%.
Now place the layer above all the layers from the Top-Circle group.
Congratulations, you're done!