I m trying to hook up cabs with my Kemper. I m usually playing live with my Kemper through the main output to FOH and from the speaker output into my Mesa 2x12 . When the venue is medium or large, no problems as i can hear myself very well between the monitors and my cab . Problems arise when I play in a smaller venue or or a pub for example. I still connect to FOH but it cannot carry the sound enough because of the volume limitation so I pretty much rely on a combination of my cab and a bit of FOH to get a fairly balanced sound. But there s no monitor and i cannot hear myself comfortably. I d like to use my other cab (4x12 Marshall 1960a vintage) but I clearly prefer the sound of my Mesa so I thought about hooking up my two cabs and see it gives me the oomph I need on stage while retaining my tone. There are no parallel outs on either cabs so I really don t know how to do that safely . any advice ?