Posted by sam9 [ 24.6.90.239 ] on June 21, 2005 at 22:53:15:

In Reply to: Who knows about preamp input impedance? posted by gumby1 on May 05, 2005 at 21:20:11:

Depends on how the input impedance is obtained. While it is generally true that the the lower the figure the lower the noise due to resistor value, there are techniques to (namely "botstraping") where low value resistors can be made to appear to the signal source to have a high impedance.

At the same time a higher impedance at the input may improve the performance of the signal source to some degree. This depends on the capabilities of the source.

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