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Re: Thanks Dave . Using a standard passive ...

84.153.34.210

Posted by Thomas Mayer on April 8, 2007 at 01:20:43

In Reply to: Thanks Dave . Using a standard passive ... posted by 01A on April 7, 2007 at 16:29:51:

Hi!

At the point where the impedance of your chokes starts to have an effect on the output impedance, your driving stage will start to have a roll off.

Typically one would select the input impedance of the RIAA network to be about 10 times the output impedance of the driving stage. A drop of the output impedance would theoretically boost a bit, but much less than the rolloff which it would have itself.

With a rp of 1.9k it should not be difficult to find a choke which gives a very low roll off frequency.

Best regards

Thomas

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