Can a Quality Full Range Speaker be the Limiting Component in a system?

I find that most 'full range' speakers aren't. If you really want the bass right, you'll need a sub, if you really want extension in the highs, a tweeter.

Most full range units don't make it much below 50-60 Hz. That's a bit of a bottleneck.

Because they have low frequencies on the cone that they can't reproduce, they can have higher distortion as well. A lot depends on the source material- with the right stuff they can be wonderful.

Gryphon Kodo go down to 6 Hz, or so they say.

I am having trouble not reducing this down to a very simple question:

"Are quality loudspeakers ever non-linear"

to which the answer is of course yes. But if you want some simple terms, how about dynamic compression? That is, +3dB input results in less than 3dB increase in output. Very common situation which many speakers suffer from.

Best,

E

If the question is referring to full range speakers meaning full range single driver speakers, some of the higher end Lowther drivers claim a 20Hz-20KHz frequency response. So I suppose they technically exist. Same for full range speaker "systems". So the question then becomes a measurement issue as whether or not every component in the audio chain can deliver the entire frequency range. If so, then theoretically there's no bottleneck.
The problem is if we mix the notion of the sound quality with measurements, then the discussion becomes completely subjective and there's no single answer to the original question.