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<blockquote data-quote="Frank Koenig" data-source="post: 130314" data-attributes="member: 416">Re: XLR cable passes signal but ~20db lowerI had a different (but possibly related) cable problem that baffled me much longer than it should have. I had connected an unbalanced source (consumer CD player) to a balanced line level input through some ugly combination of cables and adapters, some of which, no doubt, dated to the 1970s.I fired it up and the sound was clear and loud, and VERY bright. After listening for a bit I concluded that there was no audible bass whatsoever, but otherwise it sounded fine. What was wrong? It turns out that I had ground continuity but the CD player output ended up on one conductor of a shielded twisted pair and one side of the balanced input on the other, with no continuity between the two. So I had made a nice capacitor with one wire as each plate and, in combination with the load impedance, the resulting first order high-pass filter must have had a -3dB of around 500 Hz. Doh!-F</blockquote>

[QUOTE="Frank Koenig, post: 130314, member: 416"] Re: XLR cable passes signal but ~20db lower I had a different (but possibly related) cable problem that baffled me much longer than it should have. I had connected an unbalanced source (consumer CD player) to a balanced line level input through some ugly combination of cables and adapters, some of which, no doubt, dated to the 1970s. I fired it up and the sound was clear and loud, and VERY bright. After listening for a bit I concluded that there was no audible bass whatsoever, but otherwise it sounded fine. What was wrong? It turns out that I had ground continuity but the CD player output ended up on one conductor of a shielded twisted pair and one side of the balanced input on the other, with no continuity between the two. So I had made a nice capacitor with one wire as each plate and, in combination with the load impedance, the resulting first order high-pass filter must have had a -3dB of around 500 Hz. Doh! -F [/QUOTE]

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