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RE: 80 Hz amp

Posted by dave slagle (M) on November 25, 2015 at 07:33:16

In Reply to: RE: 80 Hz amp posted by Chip647 on November 24, 2015 at 07:08:52:

I am unclear on two things about this input.

The input is listed as a 1:2 step up loaded with a 10K pot. This puts the input impedance at 2500 ohms. What does the 10K and 100R values refer to? (10K suggests a 1:1 and 100R suggests a 1:10 ratio

The source impedance feeding the bass attenuator will change with the master volume control causing a slight shift in bass attenuation as you adjust volume. (worst case about 1.5dB) I presume the 4.7K resistor is added to temper this variability a bit but it doesn't do much.

dave

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