I want to use the FiiO A1 Portable Headphone Amplifier (Black), with output of 78 mw to power my maxell behind the ear earbuds from an extension wire from the amp to the earbuds of about 15 feet. I am connecting my FiiO A1 Portable Headphone Amplifier (Black), to the audio output of my television. Is 78 mw of output enough to power my earbuds at 15-20 feet distance thru a wired connection from the amp to the buds?