The Right Headphone Amplifier

headphone amplifier

A headphone amplifier is an amplifier designed specifically for audio headphones instead of speakers of unity. Most cases that are embedded in electronic devices such as amplifiers, portable music players and televisions, but separate units are not infrecuentes.

Headphone amplifier mentioned here that the commercially available devices separate, sold at an audiophile niche market. These devices allow higher volumes and higher possible current capacity compared to smaller, cheaper amplifiers that are used in most audio players. In the case of very high-end electrostatic headphones, such as the Stax SR-007, a specialized electrostatic headphone amplifier or transformer step-up box and the power amplifier is required to use the headset and beats headphones, since only one amplifier helmet designed electrostatic or transformer, the voltage level necessary to be lead to the helmet.

 The most headphone amps provide power of 10 mW and 2 W is used depending on the specific design of the amplifier and headphones. Some high-power designs, up to 6 watts of power into low impedance loads, although the benefits of such a benefit with a helmet is not clear, as the little ortho dynamic headphones that have sufficiently low sensitivities, it is with such a step function of power [1] dangerous to reach high volumes, with these amplifiers. RMS is a headphone amplifier a small amplifier that can be plugged into a standard headphone jack or (usually) the line output of an audio source. This allows the headphones caused a low sensitivity to Loader, because of the additional voltage supplied by the amplifier. There are potential gains loyalty when headphones with low distortion when driven with a headphone amplifier built into an audio product for general use. In practice, this happens more frequently when using a headset with an impedance lower the consumer electronics market with an output impedance is too low.
Many have an output impedance of headset amplifier in the range of 0.5 to 50 ohms. IEC 61938 in 1996 recommended an output impedance of 120 ohms, but rarely used in practice and not recommended with modern headphones. In 2008, Stereophile published a paper output impedance of 120 ohms was an error of 5 dB Frequency response was the case with headphones.

 The article concludes that the effect is the output impedance at the frequency response of "trivial". Some recent amplifiers have impedances of headphones, that are less than one ohm to ensure an accurate frequency response. At low output impedance is the distortion caused by improved control of the source to the transducer. This is often expressed as a damping factor.

For example, a helmet with a 32 W amplifier dynamic popular DIY) headphone output oriented a factor of 32, while the same headphone driven with an iPod Touch (7 Ω output impedance) should have an attenuation factor of 4.6. 120 ohms If  the recommendation is applied, the damping is too low 0.26. addition to the output impedance, other specifications are relevant for selecting a headphone amplifier -. harmonic distortion, frequency response, the IMD, the output power, the load impedance and other measures are also important, however, most of them by reducing the impedance of output and improve the damping can be improved.

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