I have a 5.1 HTR using a Denon receiver, Denon DVD Player, Toshiba Blu-ray, and Polk Audio Speakers. My Question is this; each time I try to play music from my Sony Mp3 player into my receiver I have to turn up the volume on the receiver until I get static to get any sound from the Mp3. I am thinking of adding a ""Tube Dac" amp/Pre amp/ headphone amp to the lineup hoping to get better sound from the Mp3 and maybe the Denon dvd ( I use it for CD's). The product I am looking at is the Grant Fidelity Tube DAC-11 that comes out in Oct. 2011 for $275. Will this help my sound quality? or is this overkill? I do plan to replace the Denon Dvd player with a Quality Marantz or NAD cd player when $ is better. Please help, I do not want to spend my $$ foollishly, I do whant the best product(s) for the $$ and would like to get better sound. I do use quality cables, HDMI, OPTICAL, RCA, and custom speaker cables 14awg. w/ gold lockable banana plugs on all ends. :):):confused: