You've got to quote people so they know your trying to talk to them.
The iNukes are great amplifiers. The 6000 is essentially 2 bridged 3000's. My 6000 is running 2 Empires and my 6000 gain knob is at about "10 o-clock" and my Audyssey calibrated level came in at -4dB, so plenty of power.
MAKE SURE YOU REGISTER THE WARRANTY RIGHT AWAY ON THE BEHRINGER TO GET THE 3 YEAR WARRANTY OTHERWISE THEY ONLY WARRANTY IT FOR 1 YEAR!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
I have mine setup as 1 channel per sub, but if you get the 3000, you could bridge it if you only have 1 sub.
I have not yet configured my DSP, I just volume matched in Audyssey.
Basically, instead of a RCA cable going to your sub, you'll need a speaker wire instead. I just took my plate amp off, used 2 spade connectors to terminate the subwoofer wire that I cut off the plate amp. Then I used 2 more spade connectors for the speaker cable at the subwoofer and used a terminal strip to connect the two. This way I can easily disconnect the subwoofer from the wire if I ever need to. (I tried looking for a cable mount solution where I could use banana plugs on the speaker wire side and "female banana plugs" on the subwoofer side, but couldn't find anything. Ideally, I'd like to make a blank metal plate to replace the plate amp and mount a banana plug receptacle on it, but the following works just great.)
Use a "terminal strip" like this at the subs:
Use "spade connectors" like this at the sub:
Buy "Speakon connectors" like these for the amp end of the speaker wire:
The Behringer uses 1/4" TRS connectors, so you'll need adapters from your RCA preouts on your receiver.
If you want one simple cable, It will look like this and is called a "1/4 TS to Male RCA" cable:
If you already have RCA cables, get and adapter like this:
I have 2 subwoofer outputs on my receiver so I used 2 of these cables/adapters. Since you only have 1 sub, you only need 1 cable. If you get the 3000 with only 1 sub, I think you could run 1 cable to the amplifier and configure the DSP to BRIDGE mode. Manual page 7: http://www.behringer.com/assets/NU60...00DSP_M_EN.pdf
If you ever run 2 subs, using 2 cables is less confusing if your receiver has 2 outputs. My amp is operating is DUAL mode (Page 7).
All these links/pics I've sent are not the exact one to buy, just what I could quickly find to show you what your looking for. Also, none of the pics are "to scale".
It isn't hard, just be patient.