What should one infer out of frequency response mentioned in AVRs / amps?

[pupupuchi28]

What should one infer out of frequency response mentioned in AVRs / amps?

That is the question. Yamaha RX V371 mentions 20hz to 20khz. Does that mean if I connect a sub to the sub out there is no point going for a sub that goes below 20hz, since my AMP will anyway not process information below 20Hz to the sub out?

 

[venkatcr]

The frequency response mentioned in AVRs is the frequency range that the AVR can handle by itself in terms of amplification.

AVRs have sub-out to handle the frequency that cannot be handled by the AVR speaker combination. Remember, there are 2 parts of frequency handling - (1) amplification, and (2) speakers. There is no sense in sending a frequency to a speaker that cannot handle it.

Most speakers have the capability of handle a frequency range of 20-20,000 Hz. This range has been decided based on what your ears can hear. The human ear cannot hear anything above 20kHz. Similarly, you cannot hear frequencies below 20Hz, though you may be able to feel it.

The sub out sends the complete frequency available in the media to the sub. The sub's own filter then decides what frequencies it wants to keep and what it wants to reject. In most cases, frequencies about 40Hz are filtered out by subwoofers.

Most AVRs allow you to decide what frequencies go to which channel or speaker. That way you get the complete range of frequencies that you want to experience.

Cheers