I'm looking for a minimal (in size and features) mixer for live performances. I'll use it as a personal in-ear monitor control, to mix the main mixer monitor output and the direct instrument signal. I want it small because the idea is to attach/embed it in the pedalboard. I prefer a passive mixer so I don't need to power it, and it will be attached to a headphone amplifier. Ideally, I'd like to have 2 channels that can be both XLR and stereo jack. Same for the output, but not mandatory. In short, the Radial MIX 2:1... but cheaper! Any idea?