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speaker hiss with audio aero capitole mkII

I have noticed a hiss from my egglestonworks andraII speakers that is noticeable from the listening position at the highest volume settings on the audio aero capitole mkII. The hissing comes from both the tweeter and the twin mid-range drivers from both speakers and is equal from both sp's. It gradually increases as the volume is turned up and is not present with the capitole turned off and the Krell fpb 300cx on. I have dedicated circuits with their own main panel and the capitole is connected to a PS audio P-300. The hiss is present also when the capitole is not connected to the P-300. I suspect that this relates to intrinsic noise or distortion in the capitole, possibly from the tubed analog output. Although the system sounds terrific, i am concerned that the hissing may be masking low level detail at moderate to high listening volumes. Has anybody had a similar experience with the capitole? Can this be improved? Any suggestions? Thanks.

Rafael
aponter4

Showing 3 responses by golden_ears

golden_ears
224 posts
 
How old is the CD player? I think you can tell by the first four numbers in the serial number (0207/335 would mean July of 2002) The little tubes in the A.A. are supposed to be good for at least 10,000 hours (14 months of being on standby or in use) and that's probably a conservative estimate. The tubes would probably go bad one at at time, but I suppose both tubes could be well past their "freshness date" if the player is a couple of years old.
The player is usually very quiet.
golden_ears
224 posts
 
Ya, what Newbee said! :-)
golden_ears
224 posts
 
How old is the player? There are two 6021w subminiature tubes inside. If the player is more than about 18 months to two years old, those tubes may need replacing. They would not grow old at the same time (if you know what I mean) or in the exact same way, so you'd start to hear a little noise in one channel, then the other a little later....?
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