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Definition Impedance is essentially a measure of how much a device resists, or impedes, the flow of alternating electrical current (AC). It is measured in ohms, the symbol for which is Ω. Lower is Better With microphones, a lower impedance is usually desirable. High-impedance microphones can cause a loss of high-frequency signal and are more prone to ...

High-impedance headphones are designed for studio-like applications where there may be multiple phones wired in parallel receiving an input signal from one source. Low-impedance headphones are designed to be plugged directly into a single source, and can more effeciently generate sound from the lower level input signal. High-impedance headphones are a ...

The power required to operate headphones is a function of the driver size and mass, whether the phones are open, closed, or in-ear, etc. The impedance of headphones is usually designed to get an acceptable volume level (power = voltage^2 / impedance) at the voltage level expected on the driving equipment. It's not necessarily a straightforward relationship ...

Well, a passive DI uses a transformer, and there will be some signal loss. An active DI, which may not actually amplify the signal, shouldn't cause any signal loss, and theoretically should have better frequency response. And because you have a pre-amp, there's better isolation from the source.

Yes, has BenV said, impedance is a measure of how a device resists or impedes the flow. The catch is, it's also frequency dependant. Some more expensive preamps will even allow you to select several input impedances for the device allowing you to approximate the one for your microphone, or if you are in the mood to try something different, well... I ...

Line level balanced out to a line level balanced input on a mixer is the best connection there is for long cable runs. Line outs have small source impedances that are good at driving long cables. I'm not sure what you mean by "use a DI box for everything line level". DI boxes turn a high output impedance into a low output impedance, but line outs already ...

The DI box presents a large input impedance, so that the large output impedance of the guitar isn't loaded down, and then it sends the signal into the mixer from a small output impedance, so that it isn't loaded down by the input impedance of the mixer. If you connected the 100 kohm output impedance of the guitar directly to the 1 kohm input impedance of ...

Well, if you'd like to relate datasheet-listed sensitivity to needed gain, it's pretty straightforward math. Standard professional line level audio is considered to be +4dBu, so we can reasonably say we want a preamp with sufficient gain to bring up the signal to this level. We just need to compute the output level of the microphone in dBu (almost surely a ...

In relation to achieving optimal sound quality, is there any advantage to pairing high-impedance headphones with an amplifier for listening on an MP3 player or laptop, as opposed to just using low-impedance headphones? Yes, there is. In fact, there is an advantage to using an external amplifier for any headphones. If you are resourceful, you ...

Size isn't all that matters in determining how much SPL will be put out. How far the diaphragm can move and with what force the magnets can move also matters. If you have a giant diaphragm and it only moves a small distance then it is not going to be nearly as loud as if a similar diaphragm is moving much further and displacing more air (stronger pressure ...

As far as audio goes, any headphones will work. If you intend to use a headset with a built-in mic, you'll have to be sure it is set up with the OMTP TRRS layout. See below... source Incidentally, there are also adapters (here's an example on amazon) to swap the ground/mic ring/sleeve layout. Of course, if you're handy at it, you could also swap the ...

It seems that the ratio of source impedance to headphone impedance, i.e. damping factor is primarily discussed in terms of effect on amplitude and frequency response. In addition, remember that a higher impedance circuit will likely exhibit a reduced slew rate and slower rise time. This will effect the clarity and openness of the sound and possibly dull ...