2ch amp and HT receiver connected to same speakers

I listen to 95% music and 5% home theater. My 2ch system is a BAT pre and a Bryston amp, and I have an Integra receiver for theater. My BAT has a HT pass-through function, so that I can run my LR speakers off my Bryston amp. This setup causes a ground loop, however, and I've given up trying to eliminate it. So I wonder if I can connect both my 2ch amp and the LR outputs of my receiver to my speakers. Would this harm my amp (especially the Bryston)? Would it hurt the sound quality of my music? Thanks for any comments.