I asked this question over a year ago on a different forum but it was never answered so I'll ask it here:

I have a pair of these which apparently were originally used in the "Super Red" version of the "Big Red" monitor. Why do I think this? In addition to the 4 connections required for hookup to the 604E driver, it has another pair of connectors. My guess is that these extra two connectors were for the supplementary 15" woofer in the bottom of the "Super Red" cabinet. However, they don't connect into the crossover circuitry at the same locations as the primary woofer connector leading to the 604 driver's LF section. Perhaps the two EQ adjusting controls do not affect the lower woofer.

I have one unit installed and I'm listening to it now. The extra connections are unterminated - simply unconnected and separated from each other. The speaker sounds fine to me.

My question is: Is it electrically safe to simply ignore this extra connection and not connect it? Or, should a resistor be connected across the connectors to simulate a speaker load?

Thanks in advance for any answers or advice!

Best to all you Altec enthusiasts out there!

Fred