Been working on an Italian FBT powered speaker and wondering what the tiny non-via vias were , connected by the finest of traces, so minimal current. They must be the "components" all over the power amp page of the Maxx 9 amp , uploaded as Max 9 to Elektrotanya, as some sort of distributed capacitance , inside the board. What is the generic name for this pcb production technique , presumably requiring an intermediary plane but not really multi-layer pcb, and any advantage in design or realibility of amps ?