True, but there's more to "quality, low-distortion output" than what you hear..
In my opinion, there's a certain responsibility that every radio operator (regardless of service or need for a license) has to keep their station output clean. Splatter and harmonics can and do often bleed on other parts of the spectrum that aren't even in the CB
frequency range. While class A and AB amps don't eliminate these things completely, there is a reduction in the amount of spurious content in the signal.
One can also use class C amps with proper low-pass filtering and produce spectrally clean output (ie vastly reduced harmonics and out-of-band content) but often there might still be some audio distortion on SSB
and sometimes even on AM
I've long been of the opinion that, given the extremely low cost of a rudimentary bias scheme and integral low-pass filtering, unfiltered class C boxes are really a bad idea. I've never been able to figure out why there are so many floating around.. Is it so the manufacturers save the $5-10 that the bias circuit and 11m LPF cost? Is it because the buyers can't be bothered to drop the extra few bucks for a cleaner amp? IDK.. it's just never made much sense to me.
Anyway, I'm not trying to preach, I just wanted to share my honest opinion. To each their own..