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Sherlock Holmes needs clues

I have determined by listening to many different solo piano CDs that something unpleasant is happening consistently across all CDs whenever the piano plays in the octave between about 500-1000Hz. The beautiful warm, natural piano sound becomes somewhat thin and tinny, as though the piano needs to be voiced. Both above and below this octave, the piano sounds warm and natural. I would like to isolate the component (or resonance, or room interaction) at fault.

I plan to play Sherlock Holmes a bit - but would appreciate any thoughts people might have to assist with my learning curve.
judit

Showing 3 responses by ivanj

ivanj
35 posts
 
Are these the same speakers/amp that you mentioned under a previous thread? In this thread you mentioned difficulties with orchestral brass... If so I suspect you may have a defective speaker or a poorly designed one. You really need go to a pair of QUAD ESL 63s, 988s, or Soundlabs.
ivanj
35 posts
 
Judit-
Could you please list the CDs that show this phenomenon? I'd like to try it on my system and report back. Perhaps you could describe where, timewise/trackwise, the phenomenon occurs?
Thanks,
IJ
ivanj
35 posts
 
Frankly, if the phase angle and impedence is brutal at the frequencies you are mentioning the amp would actually only be putting out a fraction of its "FTC" output. An example would be a 200 wpc SS amp - into 8 ohms - which actually is only putting out 6 watts or so at this nexus. Thus clipping occurs even though the volume is low. (This is why, in part, so many of the 70s SS amps of high power did not drive real speakers as well as a 35 watt Dynaco tube amp.) Am I being clear?
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