I own two MFW-15 sub-woofers, and (surprise!) the amps in both of them are now kaput. I recently converted one of the MFW-15s into a passive sub by gutting/bypassing the amp and adding a new set of binding posts. That worked well, but the extra amp I had lying around is too small and is pretty easy to drive into clipping. So, I just ordered a Behringer iNUKE NU3000, with the intention of converting my other MFW-15 to passive, and driving both the subs with the Behringer. I'm trying to figure out what sorts of interconnects I'm going to need once the amp gets here.
The subwoofer input source will be my Denon AVR. That has a single RCA output. I've purchased an RCA-to-XLR cable from Monoprice, so that should get a signal to one
of the iNUKE's inputs. Is there an amp setting that allow me to get an identical signal from both
of the amp's outputs? Or, do I need to split the signal and send it to both of the amp's inputs? The Behringer has some sort of "mono" mode, but I'm not sure what that actually means. (I can't find an online manual for any of the iNUKE products. The .pdfs download corrupted and unreadable.)
Ideally, I'd be able to connect that single XLR into one of the amp's two inputs (either "A" or "B"), and connect one sub to each of the amp's two outputs. Is that supported?
Moving on to the output side of things: This will be my first experience with "Speakon" connectors. Ideally, I like to make/use two short cables to go from the amp to the subs. Speakon connectors on one end of the cables, and banana plugs on the other end. I bought a 25-foot Speakon-to-Speakon cable which I was hoping I could just cut in half, add banana plugs, and have the two cables I actually need. However, I'm somewhat baffled by how Behringer has wired the output connectors on their amps. The whole "+1, +2, -1, -2" thing. Looking at the diagram on the back of the amp
, it almost looks like the "A" and "B" connectors are wired differently. Hopefully, I'm reading that wrong. Bafflingly, it looks like there's two different "legends" for channel B. Or, is it possible that cable I bought will Just Work no matter what, since it's a 2-conductor cable with 4NL ends? Probably not. I'm quite confused.
Anyway, is anyone else running a similar set-up? I'd love to hear how you wired it up.