Subwoofers that do both L/R & LFE simultaneously?


Running a 2 chan/HT combo. I understand the REL subs allow you to connect both the stereo high level inputs and an LFE cable and the unit apparently senses the signal. You send the sub a full range signal. Any others do this? My Para s8's don't really need help on 2 chan, but it makes sense to me to use a REL type setup with the sub crossover at around 30. That way I get a little fill-in as needed. Am I missing something, why aren't all subs done this way. Thanks, this forum is great!
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Here is a picture of a aftermarket cable offered by Signal Cable - A picture is worth a thousand words.
I thought the Neutrik was something other than an XLR and I thought it was used at the amps instead of the sub, now it all makes sense. I understand the REL's are highly musical, do the 12" REL's have the low extension and amplitude for HT? Thanks all!
Neutrik makes all kinds of connectors. XLR is only one of hundreds of types they manufacture.