newbie20072007

Has anyone else experienced this problem? I used a battery box whhich came with a 12v battery on my WM61A mics which then recorded high levels of distortion, after looking at the specs of the WM61A I realised they state 10v max http://www.panasonic.com/industrial/compon...m61_a_b_dne.pdf After changing the battery to a 9v things became a lot better !!