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Is there any standard for the input impedance of an audio ...
https://electronics.stackexchange.com/questions/342975/is-there-any-standard-for-the-input-impedance-of-an-audio-amplifier#:~:text=Generally%20the%20input%20impedance%20to%20an%20audio%20amplifier,specification%2C%20you%20are%20taking%20something%20of%20a%20gamble.
What is Impedance in Audio? Input and Output …
https://virtuosocentral.com/what-is-impedance-in-audio/
What is Input Impedance? If your equipment receives an audio signal, it has input impedance. It recognizes the signal coming from the other piece of equipment. Where connected, it “sees” the output impedance from the other device. As the signal passes from one place to another, it’s called a load (load impedance). What is Output Impedance?
Understanding Impedance - Sound on Sound
https://www.soundonsound.com/techniques/understanding-impedance
In audio input and output circuits the impedances are principally resistive to make interconnection easier — the impedance won't change too much over the range of audio frequencies. However, the impedance to radio frequency (RF) signals will often be very different to that at audio frequencies in order to keep RF interference out.
Is there any standard for the input impedance of an audio ...
https://electronics.stackexchange.com/questions/342975/is-there-any-standard-for-the-input-impedance-of-an-audio-amplifier
Generally the input impedance to an audio amplifier is 'high'. That is, high enough to be driven comfortably by any audio source output. But of course, without a proper specification, you are taking something of a gamble. 10k to 100k is the usual sort of range we find, though some can be less.
Measuring input impedance and calculating output …
http://www.sengpielaudio.com/calculator-InputOutputImpedance.htm
V = √ ( P × R) = √ (50 × 8) = 20 volts. (You can also use 10 V.) Give a sine voltage of 1 kHz to the amplifier input, until we get 20 volts at the output. Now we apply the "90% method", that is when we put an output resistance R, until there appear 90% …
Input Impedance | diyAudio
https://www.diyaudio.com/community/threads/input-impedance.106950/
The usual rule that works fairly well is source impedance (Rs)<<Input impedance (Zin). << can be interpreted as 5times less but 20times is slightly better. With your Zin=100K this indicates a pot value of 5k or 10k. Now that you have a pot value apply the rule a second time for DVD. It's Rs <5k/10 or about 200ohms to 500ohms.
How to measure the input impedance of my audio …
https://www.quora.com/How-can-I-measure-the-input-impedance-of-my-audio-amplifier-if-I-dont-know-what-is-inside
You can expect a phono input impedance to be high, around 50k and sensitivity high, around 5mv. (The high input impedance is to avoid loading the mechanical voltage generator, which has low impedance.) A mic input may be low, 600R or 50R or around 50k. The sensitivity will be high, around 5mV. (Transformers are often part of microphone circuits.)
Input Impedance a Problem? | Audio Science Review …
https://www.audiosciencereview.com/forum/index.php?threads/input-impedance-a-problem.24891/
The ratio of output/input impedance should be at least 1:10. If it's less than, it can and will have a negative effect on the sound (dull, lifeless, lacking treble clarity and bass). The ratio between the Sys, 5K, and Hafler, 22K, is roughly 1:4.
Line level - Wikipedia
https://en.wikipedia.org/wiki/Line_level
It is intended by designers that the line out of one device be connected to the line input of another. Line inputs are designed to accept voltage levels in the range provided by line outputs. Impedances, on the other hand, are deliberately not matched from output to input. The impedance of a line input is typically around 10 kΩ. When driven by a line output's usual low impedance of …
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