any amount of echo/reverb or what ever you want to call it reduces readability every single time but some people like it, i used to love it, back in the late 70's i was the first person for miles around with a propper echo and stage mic instead of the ones built into pegasus 3 radios or the homebrew springline reverbs we made from tellephone earpieces and pen springs, it was an old watkins copycat open tape machine and sounded sweet, then in the early 80's it had caught on and we were using revox and sony 3 head reel to reel tape recorders 10 times the size of the radio just to have a good sounding echo, i even slowed the motor speed on a denon 3 head cassette deck to make an echo, next thing to come along was the bucket brigade echos i used to slow them down to a semi real echo and people called it superdelay, in reality bbd was crap but it worked ok i guess, only recently with the magnum digital echos have the manufacturers got anywhere close to the sound quality of the old revox reel to reel as an echo and imho they still dont sound even close, as for the why did we do it, i would say because back then hearing a real echo was something out of the ordinary and very few cbers here had any idea how to make a real echo and have the voice of god sound but time marches on and digital echo's are 10 a penny nowadays and it drives me nuts having to listen to people with that shitty talkback going on in the background, i ask them if they would like a full length mirror too so they can look at themselfs while they listen to the constant slight feedback that only i seem to be able to hear, I HATE TALKBACK BIGTIME!!!.