26421   …Brand New Production of original Altec 26421 Diaphragm, made with original Altec tooling. This is a Higher Power version of the 34647 used in the Altec 909-16a, Altec  802, Altec 806, Altec M400, Altec 604-16G, Altec 604-16H, Altec 604-16K,  Altec Model 19, Altec 416, Altec 9872-8F.