I mostly listen to records but when I picked up a cheap CD player recently the guy at the shop pointed out that it included an optical output jack that could be used if I wanted to run a DAC. I'd never even heard of one but he said somebody had given him a cheapo tube DAC in trade and he was pleasantly surprised at how much it improved the sound in his home system. I'm thinking about trying it myself. My setup is a Dynaco SCA-35 into a pair of large Advents. I've noticed that the phono channel seems to be louder compared to the "spare"; my records are comfortably loud at about 11 o'clock on the volume knob but when I switch to CDs I can go past noon and it still sounds a little wimpy to my ears. My question is, would a DAC running between the disc player and amp boost that level? As usual, sorry for a dopey question that's probably already been answered elsewhere. Thanks for any input!