Wayne Parham Messages: 18786 Registered: January 2001
Illuminati (33rd Degree)
Calculating the values for the woofer circuit is easier than it is for the tweeter circuit, because the tweeter circuit has the added complexity of R1/R2 proportions. The tweeter circuit has to balance not only voltage sensitivity matching but also filter Q and the conjugation of mass rolloff. We've worked out values for 16Ω tweeter circuits here on the forum, but it wasn't scaled like the woofer circuit can be.
Basically, for the woofer circuit, you can just double the inductance and resiatnce values and halve the capacitance values when using a 16Ω woofer. One more thing though, the 2226J is 3dB lower at the same voltage level, so if you're using an 8Ω tweeter, you'll need to set the tweeter circuit (R1/R2) values 3dB lower than you would when using a 2226H woofer.
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