Can you use regular speaker wire for subwoofer cable?

I cant discern what you are saying. An LFE OUTPUT outputs a preamp level, bass only, signal, only good for driving an amplifier input. Amplifiers provide the power needed to drive speaker motors, not preamp outputs.

LFE outputs are generic to receivers, as it is common to use them in conjunction with POWERED ( I.E. there's an amp inside it) sub-woofers. This is done because most consumers use self powered sub woofers. The LFE output is a summed, or combined output carrying the bass signal that would normally belong to both the left and right channels on a stereo, (say).

Un powered subs require an external amplifier connected to the speaker on the one end, and the preamp (LFE) output on the other, or if no LFE, some substitute, such as an external high cut crossover or filter, THEN an AMP, and Finally perhaps two subs , or a sub with dual voice coils (one each for left and right channel - this is a specially built type of speaker, made for the purpose. None of this has anything to do with what kind of wire connector is used, if any. That said, almost all LFE type receiver outputs these days are fitted with an RCA jack.

There is nothing magical about that, its just one of a number of standard ways of plugging something in, but it is common. Its unlikely that a modern receiver would have a pin jack output for its LFE connection. You should carefully re-read your manuals, both for the bass module and your receiver.

It seems to me, you may be doing something way wrong, and perhaps dangerous that the re read may clarify for you.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.