Your line driver outputs (of the MP3 Trigger v2 board) are probably low impedance ( 5k -> Out_common In2 -> 5k -> Out_common, Out_common -> amp If you have 2 line levels outputs you could use the input impedance of the amp (probably on the order of tens of k ohms) as the base of a voltage divider. Do you mean to connect/mix 2 outputs into 1 (now mono) output to send through a single channel amp and then into 2 speakers ? I only got two speakers available for this, and I need stereo so connecting them to one speaker each isn't going to work. I've currently got an amplifier that connects to a MP3 Trigger v2 board but will be purchasing another board shortly. Preferably as simple as possible and with a fixed 50/50 mix. I'm looking to create (or buy) a board/circuit that takes two stereo audio signals (at either line or speaker level) and mixes them 50/50 into one stereo output.
