Cooking up subwoofer


I have a simple system naim atom driving focal kanta 2 speakers want to hook up a rhythmic 12" subwoofer. Not sure How to on the back of the atom.I hooked the rhythmic to preamp out on the atom I do get response but there’s not much there. Obviously the rhythmic has it’s on amp so...
myradio
Welcome, a Rythmik owner may be able to help with the model name and or number of your subwoofer.

A powered sub usually has a gain or volume.    
Subwoofers are best cooked at 325 degrees for about 13-15 minutes per pound.  Happy Thanksgivin’