As many have posted here...all the Polk, and Optimus hi-fi speakers have MUCH greater range, and
fidelity. Exactly what you DON'T want.
Hmm, I might take a different angle on this. Coming from the pro-audio world, I use full range speakers, and wouldn't hesitate to
use nearfields either. I have some hi-frequency hearing loss [possibly due to listening at high volumes or perhaps
just from old age] so I find it necessary to boost the hi-end significantly for intelligibility. Some other hams may in fact be in this category also.
Plus one's listening area probably isn't ideal. Depending upon how far one sits away from the speakers, there may be substantial room nulls at certain low-mid freqs, making for uneven balance. In the audio world they sell things like bass traps, etc., that one can install throughout the room to compensate for this stuff. Almost certainly overkill for ham radio though...
So even though most ham radio audio content won't go beyond 3KHz or so, it's fun to use full-range speakers, and have a little graphic or parametric EQ to let you experiment -- and season to your particular taste. It's always easy to throw a hi-shelf on the audio, if you decide you are getting too much hi-freq hiss. Remember, one size does NOT fit all!