Active/passive RIAA online calculator

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.

active_passive

C1 = nF
C2 = nF
Gain = db (at 1kHz)

Attenuation 1st stage = db (at 1kHz)
Voltage gain 2nd stage = (at 1kHz)
R1 = kΩ Parallel: kΩ|| kΩ = kΩ
R2 = kΩ Parallel: kΩ || kΩ = kΩ
R3 = kΩ Parallel: kΩ || kΩ = kΩ
R4 = kΩ Parallel: kΩ || kΩ = kΩ

6 thoughts on “Active/passive RIAA online calculator”

  1. Pingback: RIAA stage online calculator | Crazy Audio

  2. AM

    why 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.

    Reply ↓
  6. Warnecke

    Hello 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

    Reply ↓

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