"Full range" gets abused because it sounds nice but here is a reasonable practical check: Whenever a company feels the need to employ two or more driver to reproduce music, then none of them was not full range.
What are the specs of a full range speaker?
I've noticed that this term is used pretty loosely around here and I'm wondering what you think of when you read it in an ad. What does "full range speaker" really mean? Is it 20Hz to 20 Khz? I've always considered it to mean a speaker that reaches down into the 30s with some weight. What's your interpretation?