IMPORTANT - Compensation component values


Here's a chart that shows the appropriate values of R1, R2 and C1 compensation components for the Pi crossover. The way it works is the level of attenuation shown in the "dB" column is what the circuit presents to the tweeter below mass rolloff. Above that, attenuation is removed at 6dB/octave. So if you use R1/R2/C1 values that give 10dB attenuation, the tweeter will be -10dB from crossover up to 6kHz, at 12kHz it will be -4dB and by 20kHz there is no attenuation at all.
dB        R1        R2         C1
====================================
6dB     12 ohm    30 ohm      0.47uF
8dB     12 ohm    20 ohm      0.47uF
10dB    16 ohm    16 ohm      0.47uF
12dB    25 ohm    16 ohm      0.47uF
14dB    30 ohm    14 ohm      0.33uF
16dB    40 ohm    12 ohm      0.33uF
18dB    50 ohm    12 ohm      0.22uF
20dB    75 ohm    12 ohm      0.22uF
====================================



Follow Ups: