I can get a click when I am switching songs with my CD player.

Give the stock tube about 20-30hrs of burn in. But you will want to switch tubes to an early 1960's 6DJ8 Holland made amperex with out the A frame or an early 1960's Telefunken. Bass with these tubes is deep and powerful. They have a more transparent and detailed sound, almost holographic. Let me know when you are ready and I will give you some links to where you can get them at a decent price. I was not impressed with the stock 6922 tube but it does improve with burn in. The sound is better using the tube out instead of the SS out.