Posted by Austin fife on May 03, 2004 at 09:24:48:
In Reply to: Re: The Big 4 posted by Roy on May 03, 2004 at 04:33:18:
Roy.....
I think your Pink Noise testing data was significant....And really valuable.....
And I also recommended that you take the real time testing a step further and do the same Real Time Analysis Graphs on the Toroid Load Resister...I believe it will show remarkable affects on mid-range volume increases and timber reduction..?
And, I surly agree with you statement about : "fractions of a dB [changes] when moving your head 6” can have a greater effect."[on hi-end levels]....As well as, very small fractional movements of the test microphone positions can also have serious affects on test results..
As for the sanctity of " STAYING ON THE TOPIC"...I think there may be differences of opinion as to just what the "Big Four" Are? In a very recent post a SOLG'er added: Silver Plated Power Terminals & Sliver fuse socket changes...I was wondering how this would test out with Real Time Spectrum Analysis?
I think you are right on course with your "Pink Noise" testing ! Our Ears & Pink Noise are the best tests we have..
.And, I do want to mention that both CD's & Computers are Digital Pink Noise Sources.... And they have to use the CD Player's ,or PC Sound Card's sound filters to smooth out all the bits...And the area that is most critical for smoothing filtering... is that upper 12Khz-20KHhz...Where as, Analog Pink Noise Generators are economical and usually easily smoothed out to 50Khz. Although digital pink noise sources may be more convent...and within a fraction of DB's [+ & -] ,but render distortion may be of serious consideration...Very player dependant...