[Elecraft] Motorola Speaker VS Bookshelf Speaker ?

[Bob Lewis (AA4PB)]

I think in general, flat frequency response and efficiency are at odds
with each other when it comes to speakers. The better the frequency
response, the more power it takes to drive it. Since the frequency
response of a SSB receiver is limited to about 300 to 3000 Hz, there's
not much benefit in having a speaker with a range of 20 Hz to 20,000
Hz. A wide range speaker can be a detriment since it may reproduce the
hum, noises, and pops that are not heard with a communications type
speaker.