Subwoofer connection

The two already mentioned should get you connected.  @yogiboy solution if you don’t have high level connectors for your sub.  I think you can also use the Adapter output but not entirely sure of that one.

Either a Y cable on the pre-out jack if you are connecting with RCA cables or if there are speaker level inputs on the sub you can use those, feeding directly from your main speakers. This assumes you do not have a dedicated sub out connection on your receiver/amplifier. If that is present its just a direct hookup. If you use the sub out connection be sure and disable the low pass filter either at the sub or at the receiver. You don’t want to be running both filters as you can get unwanted interaction when you do that. Use one of them but not both. It may be easier to disable the low pass at the receiver as some older equipment may have this set at a default 80 Hz that is not adjustable and you may find integrating the sub into the system difficult. The transition from the mains to the sub may be more seamless with a lower crossover frequency. Generally, the sub will give you infinite adjustability from about 80 hz down to 40 hz which with most affordable speakers will be sufficient enough range to get them dialed in nicely. Good luck and enjoy!

I think I got it guys- Y cable makes 101% sense. This is my first receiver with pre out-n-in and no sub outs, so I didn’t know. All I knew was I didn’t want to use an older sub w/o line level inputs. The Y RCA’s have saved me before! I’m Done with cheap 1990’s 110wpc receivers. THANKS GUYS! 

Tape out. Done!  It's how we used to hook up eq's and such.  There's always output there.

bbarten

Tape out. Done!

Oh, no, you don’t want to connect a sub to a preamp’s tape output. That would feed a fixed level signal to the sub. In the OP's case, Y-cables connected to the preamp out (which is after the volume control) is the way to go.