My music sounds brighter


Hello all. All of a sudden my music sounds brighter whether I'm listening to a record or a CD. I do have to turn down the treble a bit to compensate for this and make it pleasurable to listen to. Nothing has changed with my electronics which consists of a Yanaha DSP A1 integrated amp, DBX 3BX DS dynamic range controller, Pro-ject Debut Carbon turntable with acrylic platter and Ortofon 2M Blue cartridge, Wharfedale Rubiance RB 27 floor standing speakers in the front and RB 23 bookshelf speakers in the rear and a Mirage FRX S15 subwoofer.

I would have thought that if I was experiencing any deterioration of my electronics, it would be in the opposite direction with a decrease in high-end response.

Any thoughts? Thanks.
128x128cspiegs
@cspiegs,
Interested in update of any progress or elimination of causes to your problem.

@erik_squires,
Spot on with analysis...


@dweller,
Spot on with your analysis also, I have found alien a/c can reach into places past where you can adjust from menu. Try unplugging gear for minute or two and check again...

@giri,I hope you are mistaken and it is not that serious...
Continually there are changes in our environment - everything from changes in temperature, changes in humidity and air pressure to fluctuations in microwave transmissions - that all have a slight affect on sound and an additional effect on how well we hear it. All of these same things, along with allergy flair-ups, inflammation, blood pressure fluctuations and even minor infections, can have an affect on inner ear and sinus pressure and how we hear at any particular time.
There are some nights I wake up and hear the tic-tock, ticking of both wall clocks in the rooms adjoining my bedroom - almost to the point of wanting to cover my head. Other nights I can barley hear them and sometimes, no mater how hard I listen, not hear them at all.
It could be an unaccounted for change somewhere in the chain of your audio system, but, just as likely, some type of change in your environment or in your self....Jim
How old are the speakers ? If a inner crossover part is going 
Such as a capacitor  that will deduct something from the musical performance. That includes electronics, And does it happen on everything such as cd,records
Even  s new wire or line from your circuit breaker will change 
Sonics.