Time Aligned Crossover for a 604c

[donaldpatten]

HeathKitPat:
If you can make a few measurements, I will design a Time Delayed XO for you.

The woofer impedance, is critical as it sets the woofer time delay.

Test the bare naked woofer, without an XO and no zobel. Test from 400Hz to 4kHz. Next , make a Zobel .A series resistor and capacitor connected across the woofer. Start with: 5uF and 25 Ohms. Adjust the R and C. Increase the Cap value by adding more caps in parallel Just add up the total value. Use an L PAD , wired as the series R . Adjust R and C to get a flat , smooth impedance curve.
The drawing of your XOs, shows 18R and 10 C.
Retest with the woofer with the new Zobel values.
My 605As came out 16R and 16uF. Z was 13.1 +/- 0.1dB.

DON