A/B/C and A/B/Y boxes are great at allowing multiple paths through multiple effects.
But, what to do with all those multiple outputs? Certainly they can be run to separate amplifiers. That's costly, cumbersome, and maybe not so much the norm. That leaves the need to combine the outputs into one.
Myx-It is a three-channel mixer with individual channel level controls.
The input channels are NOS JFET-based garnering the subtleties of JFET performance. The ouput section is facilitated by two op-amps in parallel, offering lower noise and improved current drive.
Specs: Input impedance, 1MΩ Output impedance, approximately 100Ω Single-ended inputs and output 20Hz to 15kHz frequency response Overall gain of 2 with input levels at max