1) Emery phor buphs 2) Hi-fi enthusiast 3) Stereo devotee 
An audiophile is a person enthusiastic about high-fidelity sound reproduction. Audiophile values may be applied at all stages of music reproduction: the initial audio recording, the production process, and the playback, which is usually in a home setting. `Audiophile` recordings include those using conventional formats but with special attention.....
one who loves accurately reproduced recorded sound
one who loves accurately reproduced recorded sound
One who loves and collects audio equipment and media 
A person enthusiastic about sound reproduction who is discerning about the quality of the audio
A person enthusiastic about sound reproduction who is discerning about the quality of the audio.
audiophile 1. A devotee of high-fidelity reproduction of sound (chiefly U.S.). 2. A person having an ardent interest in stereo or high-fidelity sound reproduction.
A species of dedicated audio nut who actually reads definitions like this.
a person who is especially interested in high-fidelity sound reproduction.