can a headphone amp, a cheap one, be used to send the pc line out to my tv's line in, in order to raise the volume enough to not have to raise the tv's volume for the purpose of watching streaming a/v? i am currently using a "line driver preamp" for this purpose. the issue is the driver does not go to "0" volume, only a range of clipping down to 30%, a guess. zero to full would be desirable.