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In Reply to: What is impedance and how does it work posted by airtime on April 7, 2014 at 08:21:05:
Impedance (Z) is the sum-total of Resistance (R), Capacitance (C) and Inductance (L), usually expressed in Ohms, though it may vary with frequency due to the L and C components.
Lower output impedances are usually better, especially at the amplifier outputs. There, you'll tend to get flatter frequency response. And in the case of preamps outputs, better ability to drive longer runs of cable.
Input impedances are another matter. Not sure why your power amp would have switchable settings there, but you can probably just leave it in the 100K position and forget about it.
Phono inputs are a special case: There, you want to start with the manufacturer's recommended Resistance and Capacitance settings.
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Follow Ups
- RE: What is impedance and how does it work - 4season 09:33:26 04/07/14 (3)
- "Not sure why your power amp would have switchable settings" - E-Stat 09:41:05 04/07/14 (2)
- RE: "Not sure why your power amp would have switchable settings" - airtime 10:12:37 04/07/14 (1)
- As an aside to the fixed/variable option - E-Stat 11:09:17 04/08/14 (0)
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