The relationship with the Sound of Loudpeakers. A design flaw?
Assuming that you have a healthy ear, it can happen that listening to a symphony or a song by Jazz or Rock through a Stereo HIFI, at some point give some aural discomfort or intolerance to that music. The strangeness is that you were listening to a song chosen because your liking.
This auditory disorder is due to extraneous distortions that were added and mixed with the original electrical signal coming from the amplifier. Our ear, which is a very sensitive organ, records those subtle alterations produced by the speakers and sends them to the brain that reacts in a negative way. You've been involved from an unbearable phenomenon called: LISTENER FATIGUE. Normally, this phenomenon is not attributable to the CD player or amplifier. The problem is in the loudspeakers. It can happen with Speaker Systems unsuspected because, their good reputation of the brand. What are the symptoms caused by this anomalous listening? Physical fatigue, headaches, ear pain, intolerance to prolonged listening, although low volume.
What to do?
The Loudspeaker System in question may have been built with speakers and electronic components of poor quality. In any case, they are badly designed. So immediately discard this pair and choose another model or another speaker system with a different brand.
Keep in mind these tips:
Listen to Speakers repeatedly and at length before buying. A couple of Loudspeakers well designed will allow you to enjoy music for hours, even at high volume without undergoing the phenomenon of LISTENER FATIGUE. There are AUDIOPHILE CD, which offer recordings in High Quality music. They will help you in this analysis. Even better if you can find them in 24 Bit 96 kHz and beyond.