/diy/ - Do It Yourself

Trying to use these nippon America tweeters in a speaker design. I thought I could just run them parallel to 8 ohm main speaker, but doing that they are silent. When I hook them alone to same amp, still silent. Tried hooking them to headphone output to phone; they make noise so not dead.
Aside from hooking resistance across leads what am I missing? Thought main speaker would be enough to make it work now just feel retarded.