save it.
Set the next adjustments for the membrane:
Blending Options-Inner Glow

Blending Options-Pattern Overlay.
Choose beforehand the prepared cliché.

We’ll get the next:

Continue creating the membranes with the indicated tool . Create the inside base of the membrane, colored in 162F56 with the parameters from the next step.

Blending Options-Outer Glow

Blending Options-Inner Glow

Give some volume to the membrane of the lowest speaker. Apply then the shown instrument to draw a flare with the parameters from next image.

Fill 0% on the layers.
Blending Options-Gradient Overlay