What is power bandwidth and what relationship does it have to overall amplifier sound quality? Does it have some relationship to transient intermodulation distortion, even if indirectly?
This remains a contentious question. Power bandwidth is (in amplifier terms) the bandwidth that the amp can provide full power (usually measured at the -3dB frequency). It is closely related to the slew rate of an amp. If any signal is faster than the amplifier can handle, then intermodulation products are generated (TIM). Few modern amplifiers suffer this problem – even if the amp can only provide full power up to 10kHz, this will not cause slew rate limiting, as the signal levels are so low. There is some evidence that such a limited bandwidth creates other audible effects, possibly due to the much lower gain at higher frequencies, meaning less feedback and higher distortion. Just about every designer on the planet will give you a different answer 🙁 Q: When an amplifier gets a complex audio source (such as an orchestra soundtrack) does this create greater load conditions at the speaker end and adversely affect damping ratios determined in the normal manner. A: An amplifier does not
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