Does anyone have an idea why Altec used the 3 different Crossover networks, N500D, N500E, N500G for the identical components in the A7-500 cabinet.

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I understand the N500E is 8-16 ohm version so that you can use either the 8ohm or 16 ohm taps on the amplifier, but is still rated for 16om operation. But the remaining two are supposed to be 16ohm. But why the different “D” & “G” ? What are the differences in the 3?


Also according to Altec literature, if you use the A7-500 cabinet with the N500E, the polarity should be reversed. Why?

I am assembling the Altec "Magnificent" utilizing the N500E Crossover.

Thanks for any information you can provide.