Does Norge 1000 have Line level out? If yes, you can connect it to line level in. In this case full range signal is fed into the sub but the Low pass filter of the sub will come into picture. You can set low pass frequency to your liking with rotary knob. If you are not very keen on Roarr 210 only, then there are many other subs which accept speaker level signals. I suppose Norge 1000 has speaker A and B terminals. So you can connect speaker A to your main speakers and B to speaker level in of the sub. In this case again, the Low pass filter of the sub will be in active. sub out or LFE out is usually seen only in AVRs which separate low freq signals below the set low pass filter freq in AVR (or the .1 signal that is recorded that way) and feed to the sub LFE in. In this case, the low pass filter in the subwoofer is bypassed and the signal is fed directly to the plate amp in the sub.