Does listening fatigue go away???

Hello everyone,

Just want to ask everyone here an honest question. Is listening fatigue sometimes associated with getting used to a "presentation" coming from your setup. In addition, is the burn period people talk about also associated with the above?

The reason I ask is that I currently own a pair of Quad 12L Active speakers that were being feed directly by a Squeezebox Touch. Unfortunately this setup only had a digital volume control which really affected low level listening. My solution was to add an external means of volume control with the Warpspeed optocoupler which uses LDR. I have received it this week and it has made a huge difference in almost every facet of the sound, soundstage, speed, bass, imagining, clarity and authority without adding any coloration. It also dead quiet and I have spooked out my wife a few times when the music suddenly comes on. In fact the only issue I have been having is listening fatigue after about an hour which I did not have before.

My question is it just me getting used to the new sound or something with the warpspeed or mogami wire? How can I pinpoint the problem? I also am planning to get an EE minimax plus soon, you think that will alleviate the problem?

Thanks for you advice.