I got a Ram Head through the forum and I think it's broken.

At first I played with a 9V 1700 mA power supply and the Ram had some wierd cracking noise going on, on top of the normal "hissing sound". It didn't change at all even if I stopped playing. I had to turn it off to make it stop.
then I tried with a 9V battery and it just gave me half the power... cracking noise dissapeared but no power.
any thoughts?
/Thomas