Wayne Parham Messages: 18787 Registered: January 2001
Illuminati (33rd Degree)
The woofer circuit in this design isn't critical. It's low-passed very gradually, with plenty of overlap with the midhorn to smooth vertical modes. The only thing that's required of the woofer circuit is to attenuate the very high frequencies.
As for the coil, as long as it doesn't become saturated, laminated cores are fine. Air core coils prevent this possibility but a good iron core like the Erse Super-Q works very well and sounds great.
It doesn't even come close to saturation at the maximum power level. At 600 watts, there's 8 amps flowing through the coil and it doesn't saturate until 20 amps. So laminated iron core coils are just like output transformers - use them within their limits and they're fine.
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