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Need help in trying to trace cause of distortion

I’m trying to track down the cause of distortion which occurs in the range of about two octaves above middle C (around 1000 hz-1500 hz).  I hear it it the flute most  distinctly but it must also be there in other instruments in that range.  I’d like to determine which component is the culprit.
The equipment is fairly new except for a vintage Conrad-Johnson PV-11 preamp recently examined and Teflon recapped by the manufacturer.  I suspect it is in the GoldenEar Triton 1 speakers.
The amplifier is a Benchmark AHB2. I don’t think the other components would cause this phenomenon, so I won’t list them unless requested.  It occurs no matter what source is playing.
Otherwise the system sounds fine. Does anyone have any suspicion as to what component is causing this so I can take it for repair?
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rvpiano OP
2,668 posts
 
Grey9hound,

Unfortunately, it happens on more than one recording, but not always!
I wonder if it might be a problem with various records (CDs) but not all.
Could it be faulty recording technique?
I don’t know.
rvpiano's avatar
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rvpiano OP
2,668 posts
 
The tubes in the CJ are all very recently bought.
jetter
3,035 posts
 
I did not realize how much my preamp tubes had slowly degenerated over time until I replaced them recently.  Made a huge difference, have you considered it could possibly be your tubes?
tomic601's avatar
tomic601
12,951 posts
 
Start with one speaker and a mono signal if possible
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4krowme
542 posts
 
My experience with this sort of distortion was many years ago using a set of Synthesis 310 speakers (Conrad Johnson). In my case, it was just one driver. In short I replaced the driver, but didn't like the fact that it wasn't anymore than a driver off the shelf being a chance that in other ways wasn't as good as the original.
 Your case does sound to me to be something electronic. It is the hardest type to find when as you say it is intermittent. I would be suspicious of the pre amp that was recapped. Yes, even the manufacturer can make mistakes.
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