is out of stock:( maybe it will be back soon...   thank you everyone for your help.:)  

ok so i do more reading, and find i probably do not need amp with these low impedance headphones. only 38 ohms.   i probably be better spending money on a sound card or DAC.   would "ASUS Xonar Essence STX" be better than http://www.mav-audio.com/base/product/tube_magic_d1 ? i like the...

what about dac? i have "Realtek High Definition Audio" soundcard which is onboard but it have optical port. would i connect my optical port to the amplifier i choose? or do i need a dac which is better than Realtek?

ok i am purchase some new headphones¿ the Audio Technica ATH-M50.   now my question.   I have a old Onkyo stereo receiver/amplifier that has a headphone jack, would this be good for powering ATH-M50 or should i buy a amp like Fiio e7? is all amplifier the same except for output power, or...

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