hi i have two mics: one sony ecm-ms907 and an artigianal STEREO clip Microphone - binaural that is this below: microphone i have too an STEREO PREAMPLIFIER of the visivox-audio-technologies that is this below: stereo amplifer i need to rec rock concert (u2,ecc) what is the best solution? some tips i need to use? many thank you to all answer