What are the specs of a full range speaker?

A speaker that has strong output at 30hz may not be truly fullrange but is plenty of low bass for most music.

Room lock and room shudder are a couple of terms I like to use...room lock sets in around 30hz (or so) as you feel the bass grip the room, we've all felt it I think...feels good.

Room shudder sets in a bit below room lock and can cause the whole room to literally shudder depending on how strong the output is...mostly movies and some New age music come to mind.

Dave

The Apogee Scintilla does 20Hz to 20Khz. There must be others.

Stereophile ranks (in thier component recommendtions) speakers as full range if they are relatively flat from 20hz to 20khz. They have a second category for those that do not which includes speakers which have a 30hz to 20hz response. At least they did when I subscribed some years ago.

However I agree with Sogood51, a speaker which is spec'd out as flat to 30 hz produces a lot of bass and you may not miss that last part of an octave much.

A speaker which "reaches down into the 30's" is sort of a meaningless description. What is important is the rate of fall off when it hits its lowest 'flat' output. For example - flat to 60hz could still have some minimal output in the 30's but it would have little impact on the sound, whereas a speaker which is flat to 45hz might well have, depending on the speaker/cabinet design, a -3db frequency response of 35hz +/- which could be quite respectible, depending on the size and dimensions of your room.

"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.

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.