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Wide Bandwidth Amplifiers Problems

I am not very tech savvy but am trying to understand what the drawbacks are to wide bandwidth amplifiers, are they prone to some sort of distortion or interference and how can this be avoided? Not sure if it's possible but there was one post saying a wide bandwidth amp picked up a radio station, I would not want that and I dont see how you would prevent that! What's possible/how to avoid? Thanks 
norany
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millercarbon's avatar
millercarbon
12,531 posts
 
norany, What I said about knowing just enough to be dangerous? You just heard from the closest thing to that Steve Martin character you ever will find. Only, Steve Martin, "The Jerk" he played was funny. Only difference.
unsound
7,310 posts
 
Some wide bandwidth amplifiers can go into oscillation when used with some speaker cables. This can be fixed by adding a zobel network to the speakers binding posts. BTW, there is no audible consequence for this inexpensive fix.
teo_audio
2,197 posts
 
spacial-temporal resolution of the human ear is, as a pair, and to some extent individually: exceeds a requirement for a jitter free 200khz/20 bit reproduction in digitally based signals.... 

the amplifier tends to be the same. the seeming contradiction is a excellent sounding  tube amplifier that may only go out flat to 17khz or the like. 

the situation is complex, at best. clean non phase-shifted bandwidth and similarly important clean dynamics is helpful, regarding both being a specification involving an amplifier.

Yet... a tube amplifier can violate both to some degree and still sound good...
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