Headphone Amplifier

Headphone Amplifier
What is a headphone amplifier used for?

and dont say it amplifies headphones
do you need it for ipod?

A headphone amplifier is a kind of audio amplifier designed particularly to drive headphones instead of loudspeakers. Most commonly they are found embedded in electronic devices such as integrated amplifiers, portable music players and televisions.

How they work

Effectively, a headphone amplifier is a small power amplifier that can be connected to a standard headphone jack or (usually) the line output of an audio source. The headphone amplifier improves the sound quality by increasing the amount of power available to move the transducer, increasing the control that the source has over just where the transducer is in space. This is often expressed as damping factor. For example, a 32 Ω headphone (such as the Grado line) driven by a popular DIY headphone amp with a <1 Ω output impedance (the Gilmore Dynamic) would have a damping factor of >32, whereas the same headphone driven with an iPod (5 Ω output impedance) would have a damping factor of just 6.4. Of course, damping factor is not the only specification relevant to choosing a headphone amplifier — harmonic distortion, frequency response, IMD, and a myriad of other measurements are also significant.

Furman HA 6A 6 Channel Headphone Monitor Amplifier
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MUSES 8920 J FET input DUAL OP AMP DIP8 for High Quality Audio Headphone AMP
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Indeed G3 Valve Class A Hybrid Headphone Pre Amplifier NOS 5814 tube USA sixties
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EARWIG Headphone Amp for electric bass guitar
EARWIG Headphone Amp for electric bass guitar
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EARWIG Headphone Amp for bass guitar with AUX in
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ASUS HEADPHONE AMP 5.1 PCI SOUND CARDHEADPHONE AMP 5.1 PCI SOUND CARD Manufacturer : ASUS UPC : 610839339976

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