So I thought I timed all this right with shipping and whatnot, but I didn't. So I need help. Tonight, I'm playing a country gig in Austin at a venue where I'm going direct to FOH. I have a custom passive P-Bass, my Sansamp Bass Driver DI, and I'm picking up my Westone ES20s at 1:30pm from my Audiologist. I've ordered a Rolls PM351, but it won't be here until tomorrow. The mixer at the venue is a Behringer XR12 with 2 aux sends. They have powered subs and flown mains, and my bass sounds really good going direct. I've done it before. The problem we have is it's a small-ish stage, and they only have powered 15s for mains, so it kills my ears. Kick is mic'd, all guitars, and all vocals and my bass. So, my question is, can I get a small format mixer for tonight, run my bass signal into one channel, and the monitor feed from the board into the 2nd channel, and plug my Westones directly into the "phones" output of that small mixer? Would that work for tonight just like that?