The phrase "whole spectrum" refers to the complete range or variety of something. It means covering all possibilities or aspects within a particular subject or topic. Full definition
In between, there's a whole spectrum of things and we're starting to talk about it now. (canadianbusiness.com)
I listened to and chatted with a great range of people across the whole spectrum of the industry, from writers and programmers to executives and even recruiters. (canadianbusiness.com)