Questioncan you tell me how to hook up a dbx 231 EQ to an adcom 710 preamp with rca to 1/4" unbalanced connectors?
AnswerYes.
Use cables with rca on one end and phone plugs on the other.
But according to my information the DBX 231 has xlr outputs.
http://www.musiciansfriend.com/product/Live-Wire-XLRFRCA-Audio-Cable?sku=331069&...
http://www.wwbw.com/Hosa-GPR123-Right-Angle-RCA-to-1-4''-Phone-Plug-Adapter-i186...
Above are just examples of cables that will go from xlr to rca and from rca to 1/4 phone. You can find many, many others by googling. Also, they are available at music, audio and electronic stores.
Let me know if you have further thoughts.
C