Don't give up! Component needs time to burn in, espically high end component(at least 200hrs). Once burn in, it's another world. Be patient. Grounding for pre amp is very very IMPORTANT! May be you can see my "Super GG Project" as reference. World of DIY is wonderful, you will learn many many knowledge that you never think before. Remember, DIY is fun & share, ENJOY OUR DIY WORLD!