Butterworth High pass 3rd Order (18dB)

Select C1 and C2 in the best possible quality in your budget, L1 as Cu 1.0 (18AWG) or below

Change parameters to your requirements

The calculated values

Cross-over frequency 1000 Hz

C1 = 13.26 uF

C2 = 39.79 uF

L1 = 0.96 mH

the calculated values are rounded to 2 decimals

Recommended values for capacitors

C1 = 12 uF + 1.2 uF  parallel

C2 = 39 uF + 0.68 uF + 0.1 uF  parallel

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