The 520 already has surround sound so you shouldn't need that mic. It's only 4 channel prologic
i believe isn't it?
I have the sony hw2 center channel mic which works quite well and would probably be a better bet for you
It's a wireless blue tooth mic that works up to 300 feet from the cam. It takes the place of the center channel on your 5.1 cam while
the on-board surround mics continue to operate. The audio quality is quite good on it, and it also has 2 way communication on it (the mic on the subject and the receiver on the cam have a jack for an ear piece). The subject and cam operator can speak to each other from greater distances.
Here's a sample of the sound waves while using the center channel mic:
This sample is about a second long and you can tell by looking at each track that they are slightly different (indicating that each mic is picking up something a bit different). The center channel mic was about 60 feet away from the cam at the time.
It's a good mic... it's dolby digital... and I think it's a better solution than the one you're looking at.