I use two small computer speakers. Positioned one on the left and one on the right of my monitor. They plug into 120v outlet and also into the audio jack on the pc. The speakers are fairly old but i really like them. They are probably 18 years old. When i first owned the speakers you could turn the volume knob 1/4 on and the speaker would be at a good volume. Over time you had to turn them a little past 25% to reach the same volume but you never noticed the minute adjustment difference. Recently I noticed i now have to turn it to 50% to achieve the same volume and now after a few months i now have to turn it to 60% to achieve the same volume. I dont have to turn the volume up periodically while im using it just over the years its required more. What would cause this and is there a possible fix like maybe old capacitors or something. I tried googling the issue but havent found any similar issues.