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Well, THAT's Not Gonna Fucking Work!
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<blockquote data-quote="Mark DeArman" data-source="post: 39638" data-attributes="member: 950"><p>Re: Well, THAT's Not Gonna Fucking Work!</p><p></p><p></p><p></p><p>After consulting the dbx website I noticed that the outputs contain an RF filter. It is possible that a poor choice of notching filter has a phase response showing up. </p><p> Also, L*C for a notching filter with phase deviation starting at 16kHz is around 100x10-12. dbx could have chose some poor output topology which when attached to a high impedance measurement system causes the problem. The problem may not be visible when connected to a 600Ohm or even 10kOhm input, but a 1MOhm input might make the Q small enough to bring the the phase change into the audio spectrum. </p><p> </p><p>Or maybe its always a problem. Who knows. I just wanted to know why you guys were seeing this behavior.</p></blockquote><p></p>
[QUOTE="Mark DeArman, post: 39638, member: 950"] Re: Well, THAT's Not Gonna Fucking Work! After consulting the dbx website I noticed that the outputs contain an RF filter. It is possible that a poor choice of notching filter has a phase response showing up. Also, L*C for a notching filter with phase deviation starting at 16kHz is around 100x10-12. dbx could have chose some poor output topology which when attached to a high impedance measurement system causes the problem. The problem may not be visible when connected to a 600Ohm or even 10kOhm input, but a 1MOhm input might make the Q small enough to bring the the phase change into the audio spectrum. Or maybe its always a problem. Who knows. I just wanted to know why you guys were seeing this behavior. [/QUOTE]
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