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What's causing the highs to be rolled-off?

I finally achieved the fullness, detail, and bass-weight I want from my system.

My system:

Blue Circle BMPH integrated-solid state /Audience PC (to FIM outlet)
Modwright Sony 999ES /VH Audio Flavor 4 PC/ Furutechs
Raytheon tubes
Acoustic Zen Matrix Ref II (single end)
PS 9.0(power supply for Modwright/ tube rectified)
Black Sand Violet V1 PC
Raysonic CD 128 (VH Audio Flavor 4)Wattgates
EH 6922 tubes
Acoustic Zen Matrix Ref II (single end) and Blue Jeans XLR
PS Audio Premier /PS Audio Statement SC PC
Reimer Wind River GS speakers
Acoustic Zen Satori cables
HSU vtf 2 mk2 sub / FIM outlet/ PS Audio Ultimate Outlet
Earthquake Supernova Mk IV sub

Both my sources are connected to the Premier. BMPH to the wall. The problem is the highs are rolled off. What do you think is causing this? A few days ago I cleaned the Audience PC connected to the BMPH with deoxit- I wiped it off but did not use anything like alcohol to clean off the deoxit. Could that be causing roll off in the highs? Or could it be the PS Audio Statement SC power cord which just finished break-in after 2 weeks of playing. I'm considering trying a DCCA cord on the Premier in place of the Statement SC.

Thanks for your feedback.
foster_9
markphd
667 posts
 
The most common cause of rolled off highs is deterioration of your hearing. If it was a sudden change however, I would just repeat Tvad's comment.
rlawry
484 posts
 
Could your tubes be going bad? Did you try switching them out? Are there any other symptoms?
foster_9 OP
1,638 posts
 
What element was added just prior to the highs being rolled off?
Tvad (Threads | Answers)


I was using a 6 ft Audience pc on the BMPH integrated that was about 2 months old, which I sold -it replaced an older 5ft. Audience pc. Put back the older 5ft. Audience pc on the integrated. The highs were good prior to that change. At the time, the PS Audio Statement SC pc was ending a 2 week break in period. The stock cord on the Premier was replaced with the PS Audio Statement SC pc 2 weeks earlier. I wanted to improve the highs as they were somewhat rolled off using the stock pc on the Premier. The highs improved after I added the newer Audience cord to the integrated- but, then too, the Statement SC power cord was breaking in at the same time. At the time, I was not sure whether it was ultimately the newer Audience power cord on the integrated or the Statement SC power cord on the Premier that was responsible for the improvement in the highs. But now, that the older Audience pc is on the integrated and the Statement SC pc is broken in, the highs are rolled off again. Hope I explained this sequence well enough.
jaybo
4,478 posts
 
A/B your amp with another. the gs speakers should be extented in regard to the treble.
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