Listening Fatigue

The worst offender causing the ailment of "Listening Fatigue" is the acoustic suspension speaker as designed by Kloss and Allison in the early 1960's and still around today. The scientific reason the resultant sound completely wears me out in less than ten minutes is due to the nature of the acoustic suspension enclosure (completely sealed) that sucks the energy of the amp resulting in 10DB or more loss of acoustic watt db's. The sound is so unatural that the listeners brain MUST then make up for the loss of "Reality" in the produced sound, this overworks the brain during the first few minutes of listening. This overtaxes the acoustic center of the brain (Temporal lobe).The sealed acoustic suspension speaker enclosure is the single WORST audio invention of all time.Although benifiting amp manufactoures who then made 200 watt amps. On the other hand EFFICIENT enclosures (horn and reflex) do the exact opposite and energize my brain. The acoustic suspension enclosure sucks acoustic energy and brain energy(and more dollars for hi watt amps).

Listening to analogue i never get tired,I always wish to hear more even after several hours.I find even with a good digital source I get bored,fatigued,whatever after about one hour.
I think the term "listener fatigue was coined after the introduction of digital playback.
Scott

Pretty much agree with Sean,volume in a good system begs to be elevated.The highs for me do most of the wearing out,Bob

I agree it could be any element in your system but the speakers you choose and the format i.e. analog versus digital are the main culprits in producuing glare, hash, digititis, painful, shrill, harsh sound. That is what makes music fatiguing. Also agree it highly dependent on the listener preference, the volume (I like it loud but only for an hour or so ) I can listen to my analog set up at low volume all day. Therefore it is frequently inherently a function of your preferences. On the other hand, I wouldn't buy a flabby or bloated system just to compensate for the brighter, clean sound of a fine system.
You may want to try more relaxed systems which aren't going to everwhelm you, such as a pretty monitor on a good box, like Merlins with a tube amp and listen in a relatively small space at moderate/low volumes if hours of critical listening are your ultimate aim.
I employ several choices to meet my musical needs. If I want a rock concert experience I use big box vintage horns with relatively high power solid state in a huge room 30' x variable widths. I usually limit that to an an hour or so. If I simply want to hear good classical/jazz/acoustic its moderate volume using lower powered tubes and an analog source which I can listen to for an unlimited time or until I get bored with it, then I have to rock my soul.