I have a Focusrite Saffire Pro 40 which will be used for recording band practice but it only has 2 stereo outputs. what headphone amp will give me at least 6 or 7 more people the ability to hear the mix and possibly let them mix their own mix? the easier the product the better for me. im not even sure how this will be done coming out of the 2 outputs into a headphone amp. trying to keep this around $400 or so or under this might even be able to be done with the saffire but im really dumb when it comes to recording so i have no idea how this is done any ideas? thanks!!!