So I have a Hartke 3500 and a Presonus Eureka and I want to run the presonus as an additional preamp to the amp. I want the parametric EQ and the compressor of the presonus, but also I still want the preamp section from the hartke to be sent to the power amp section. I figured running the preamp through the effects loop would work, but it just bypasses the one that doesnt have my bass plugged into it. How can I run both of these effectively?