A broad spectrum can be constituted-of-or-filled-with populations.
A broad spectrum can be constituted-of-or-filled-with (research projects).
A membership of a consortium may represent a broad spectrum of corporations.
A spectrum can be constituted-of-or-filled-with (interest groups).
A spectrum can be constituted-of-or-filled-with (dance styles).
A spectrum can be constituted-of-or-filled-with differences.
A (radio frequency portion) may pertain-to an electromagnetic spectrum.