I currently run an SVT-5 PRO pushing a PR410-HLF. I've been thinking about getting another 410 cab, or a 15. What I've though about doing is running the SVT-5 bridged into the original 410, and slaving my old Hartke 7000. The only problem is that the Hartke doesn't have a preamp in. Where should I connect them? Can I run the pre out from the SVT into the instrument in on the Hartke? Or would the effects loop work?