In one embodiment, a co-axial speaker system for generating quality hi-fidelity sound with reduced distortion of wave propagation using a generally flat diaphragm and generally flat suspension. For this purpose, the insert is positioned in the die in such a way that any force which occurs for the purpose of fixing the insert is compensated for by a collinear force, which minimizes the bending moments exerted on the insert. The air source is connected two the two inlets to produce an airflow.