Oh no, here we go again forgetting on 11M CB anything they can get away with is considered "legal". From a realistic standpoint technical considerations are paramount, "running power" with a clean signal nobody knows you have an amp unless nearby rigs start emitting smoke or a guy 100 miles away gives you a "wall to wall and treetop tall" signal report.
Like we've been saying all along, a poorly designed amp puts out a dirty, easily recognized signal, lots of distortion and splatter. Most CB amps are "basement workshop jobs" with few exceptions, frankly I wouldn't touch anything that Dave made, or Texas Star, everything is bigger and better in Texas, hogwash!
NXN makes a good case but didn't explain Class C, maybe the highest DC input watt for RF output watt amp there is but the output waveform is highly distorted. RF waveform distortion isn't an issue with CW or FM but where amplitude variations (SSB and AM) carry the modulation all you'll hear is garble. That's where Class B and AB come into play, far less efficient but they follow the input waveform so the output is properly modulated. Most so-called CB techs can't even spell A, B, AB or C so don't expect a good sounding amp or one not loaded with harmonics and spurs causing interference for miles around.
Just between you, me and the lamp post, once upon a time I had a 100W DC to light push-pull class AB amp in the mobile on full time and nobody ever new the difference. The key is it was wired to the battery with no on-off switch, idle current only 100mA so it really didn't need one. Too bad I don't remember which major manufacturer made it (those were the days), that audio was clean and sweet.
Now don't think I'm in any way endorsing illegal operation, I'm just telling it like it is. The whole point is, these days trying to get a clean CB amp is like pulling hen's teeth, roll the dice and you lose... snake eyes. So why make enemies? Just don't do it, be a ham. Hey, I know plenty of hams who do CB so why not have a go and shoot the moon?
I was going to get into EME (moon bounce) but this is getting rather long...