Using this page you can calculate the component values for an active/passive RIAA equalization stage as show below.

### How to use the calculator:

- Select a value for C1 and C2
- Select the gain of the whole stage (including the attenuation of the passive stage) at 1kHz
- Press “Calculate resistors”
- The form calculates the exact values for R1 to R2. Resistors are usually not available with exactly these values. However, with a parallel circuit of two E24 resistors, you can often approximate these values quite good. The calculator finds 2 E24 resistor values that best matches the value.

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AMwhy not let the user choose the three turn over frequencies ( now 2122, 500 and 50) on their own. Then they can reconfigure the circuit as they want.

Thanks.

WarneckeHallo,

The calculator is not correct.

Regards Jürgen Warnecke

WarneckeHallo,

Attenuation 1 Stage -3.35 dB

Correct value -0.871 dB

Regards Jürgen Warnecke

Alex1000000/2/pi/1000/0.1 = 1 591.55

20*log (sqrt(1591.55^2+750^2)/1591.55) = 0.871

WarneckeHello Alex,

Your value is equal to my calculated value, but it is attenuation.

So it is -0.871 dB.

20*log(1/sqrt(1+(1000/2122)^2)).

1000 Hz is the frequency

2122 Hz is the-3db frequency of the first stage.

Regards Jürgen