Eldartford wrote:
"Frequency response is not the same thing as step function response, but it is correlated. And a lot easier to measure. If an amp is 0.5 dB down at 100 Kc it probably has good step response."
You cannot make this inference. Step response and impulse response are dependent on short-term transient power delivery. I can design you an amp that has bandwidth to 1 MHz, but has lousy step reponse (overdamped). To achieve critical damping, the decoupling must be done right (topology), and using components with optimum characteristics for that. This is what is wrong with 99% of consumer gear. The designers understand circuit design, but not transient power delivery.
"Frequency response is not the same thing as step function response, but it is correlated. And a lot easier to measure. If an amp is 0.5 dB down at 100 Kc it probably has good step response."
You cannot make this inference. Step response and impulse response are dependent on short-term transient power delivery. I can design you an amp that has bandwidth to 1 MHz, but has lousy step reponse (overdamped). To achieve critical damping, the decoupling must be done right (topology), and using components with optimum characteristics for that. This is what is wrong with 99% of consumer gear. The designers understand circuit design, but not transient power delivery.