I please forgive my complete ignorance on this matter.I recently purchased a Sony D25 along with Sennheiser hd 595 headphones,everything sounds great but I would now like to get a Slee Novo headphone amp. My question is how will this work? presumably the amp is connected to the D25 via the lineout? However I dont know what the lineout is and where it can be purchased. Any help would be greatly appreciated.