Headphone amplifiers what is the use
http://www.siliconray.com/sense-g5-tube-solidstate-hifi-headphone-amplifier.html
The ear has many functions put amplifier
1, used to amplify the signal audio source, to fully promote headphones
2, impedance matching
3, tuning up.
High quality of audio source and headphones, add the headphone amplifiers, the effect will be significantly.
The poor quality of is not necessary........
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