|
Propeller Head Plaza Technical and scientific discussion of amps, cables and other topics. |
|
|
|
Propeller Head Plaza Technical and scientific discussion of amps, cables and other topics. |
|
In Reply to: Re: Unfinished Business: Cable Distortion Measurement Redux posted by Bob Alach on November 25, 2003 at 23:20:55:
Frankly, I don't remember many of the details of the testing proceedures since this all took place about three years ago. I remember looking first for harmonic and intermodulation distortion products using sine and multitone test signals without much luck. The Coherence test that MLSSA allows is the only measurement that I could perform that showed differences between cables that were repeatable and confirmed by independent listening tests.Independent BLIND listening tests? :)
Anyway, from what I saw on their website, the coherence testing is basically a phase/group delay measurement and measuring 100 feet of cable it's not surprising that differences showed up.
I am still not sure what aspect of the cables I was measuring, or if it was the driver / cable interface as you suggest. I was happy just to find a correlation between a repeatable measurement technique and the audible results. Obviously, much more needs to be done.
Yeah. When you start to introduce reactance, especially the much more significant amounts you'd have with 100 feet of cable, the measurement system won't necessarily behave the way it would with purely resistive loads.
But hey, you ultimately accomplished your goal. That's always a good thing. :)
se
This post is made possible by the generous support of people like you and our sponsors:
Follow Ups
- Re: Unfinished Business: Cable Distortion Measurement Redux - Steve Eddy 00:28:34 11/26/03 (0)
Top of Page ]
[ Contact Us ]
[ Support/Wish List ]
[ Copyright © 2025, Audio Asylum, all rights reserved ]
