Passive crossover

[woody]

I need a 500 hz 12db/oct xover and have an amp that needs an input and output cap.
I believe to use the input cap as the first filter element and the output cap as the second
filter element wouldn't I nead each to be 1.5 db down at 500hz so they would add up to
-3db ? How would I calculate the r/c value for - 1.5 db.

 

[nigelwright7557]

F=1/(2 pi R C)

 

[woody]

Thank you .

 

[Citizen124032]

With Fo = 1 / ( 2 * π * R * C ) for each filter (input and output) will give a -3dB point for each filter, resulting in a -6dB attenuation at 500Hz.
With a shift down of about a half octave (-/- 125Hz), you are near the -1.5dB points of the high pass filters. I'd rather use 400Hz for this purpose.