I run wirelessly into the Line 6 receiver and into the Carvin. I bi-amp my highs and lows. I am inserting (tip/ring) the LOW channel on the EQ for my lows and my highs go through the VTBASS into the HIGH EQ Channel. The effects loop on the Carvin goes the tuner. My issue is that I can get sound from the Carvin's DI just fine (the Line 6 too), but I only get humming from the VTBASS and nothing from the EQs. I am trying to use the DI outputs from the VTBASS and the Carvin simultaneously to record. I've tried changing the bridge and pre/post settings, but nothing seems to be working. When I turn up the XLR output on the face of the VTBASS the humming gets louder, but nothing worth can be heard. My explanation is probably not that great, so here's a drawing! Hopefully, it's something simple if it's possible. I am not a professional by any means. Thank you for your consideration!