I'm not getting the maximum soundand I have to keep maximizing the sound I do have each time I log on

My sound is half of what it once was. I adjusted all I could find and when I go in to "system" - click on sound and adjust to the max, my sound improves another 1/4, but I have to max it every time I log in. My speakers are always turned to max as well and they were usually at half, with room to turn louder.