What are the specs of a full range speaker?

You probably mean a "speaker system", judging by how a number here are responding in a way that seems to equate "speaker" with "driver". In audiophile circles it is always good to deny whatever has been sound thinking for many years in favour of arguments that are tenuous at best, and pure folly at worst. I think that the most often agreed upon idea is that a “full-range” speaker system should ideally cover 20 Hz to 20 kHz, but that if it falls short on the low end by ten or twelve Hz it can still be considered as such. On the bottom end I don't think anyone should fret if it doesn't go down all the way to that point as anything around 30 is plenty of bass. The absolute bottom is more felt than heard and integration into the room is not always obvious. In the treble range what is mind-boggling is that many believe that the response should go way over 20 kHz when most adults can barely hear beyond twelve/fourteen kHz. All this will never stop subjective audiophiles from arguing all manner of things until they are blue in the face.

Tvad, because the low frequencies can be felt through your body as anybody who has contact with a system playing super low frequencies will tell you. Only very few researchers believe that high frequencies are felt through the bone structure of the head. Anything that turns you on is all right as far as I'm concerned, but I still think that defining terms and agreeing on basics is too important a subject to always put forth the exceptions to any given rule or a way-out theory as being what should be given prominence in these discussions. Call me crazy!