Low freq. from small drivers? Is it possible

The only small speakers I have heard that had ridiculous bass, relatively speaking of course, were Royds. They are tiny floorstanders that have a weird porting design that makes them sound really full range while only having 6 inch drivers (or something close to that). They are cool but very rare in the USA.

Small drivers, like 3/4 inch headphones, are perfectly capable of LF response, but not at any volume. Because a small driver cannot move enough air to achieve useful volume at low frequency they are designed for other characteristics like mid/high reproduction. A 6 inch subwoofer is technically possible, but would be almost useless for any real audio system.

Here is the Royd homepage if you are interested: http://www.roydaudio.com/main.htm