hi all I got an old Marantz stereo amp with two reconed cabinets, sitting in my basement. now I want to get a mixer (either digital, analog, passive etc. but not powered) and plug it in to the aux. in on the Marantz back, anyone knows if this will work as a full range PA for a band setting (I can plug my bass amp to the woofer out)??? will it reproduce guitar, bass and drum sounds authentically (I'm sure keyborads will work fine)? do I need to plug my active bass into it with a DI box or the onboard pre cancels this need? thanks.