If you get a sub that has high level inputs AND outputs, you could run speaker cables from the peachtree into the “in” on the sub, then go from “out” into your speakers.
Another option is to run your dahlquist’ full range and get a subwoofer with speak-on connections, like Rel or Sumiko. Sumiko subs are 50% off right now at TMR
Another option is to run your dahlquist’ full range and get a subwoofer with speak-on connections, like Rel or Sumiko. Sumiko subs are 50% off right now at TMR