Some amplifiers will not have the power reserves to reproduce a sudden burst of musical energy. An amplifier which does possess this reserve power is able to reproduce this difficult passage of music. When the sudden burst of musical energy occurs the amplifier reproduces it immediately and completely. A lesser amplifier will trim detail and not provide the sudden impact of this piece of music. This is where the expression 'fast' is derived.
I hope this makes sense to you. You might also run down to Barnes and Noble and grab a copy of Robert Harley's "Complete Guide to Highend Audio." His book has many of the definitions a person might be seeking.
I hope this makes sense to you. You might also run down to Barnes and Noble and grab a copy of Robert Harley's "Complete Guide to Highend Audio." His book has many of the definitions a person might be seeking.