Maybe this is just me but I find that the tone from my bass changes from day to day. Sometimes it sounds warm and great and I can play for ages. Other times I pick up my bass, play a few notes and the tone sounds rubbish - really grey and lifeless. I've been trying to work out why this is and if I need to change my, bass, amp, strings, pickups, practice room!? I have come to the conclusion that my tone changes with the weather. i.e. when the weather is nice and warm - so is my tone. When the wheather is miserable and cold my bass sounds rubbish. Could there be any sense to this or am I just a crazy nut who is imagining things!