Have an integrated amp with only 1 subwoofer out...

Hi.

I am very new to this, so I apologize for my basic question.  I have an integrated amp that only has one output RCA...which is a subwoofer out.  I have a powered subwoofer already, but I wanted to hook up a graphic equalizer to the amp as well.

Is there a way to do this easily?

Thank you!

-Eric