SonicAlbert said:It will pass signal and make that signal louder. AS long as you keep your expectations in that range you should be fine. You paid about 19 Euros a channel for that. Their build costs are obviously far below that, and include the case, the power supply, knobs and paint job. The preamps in that unit probably cost in the area of pennies each to make. As I mentioned before, it will amplify your mics, but keep your expectations low.