I recently purchased an audio unit from Shark Audio. I can honestly say..it is a POS! Worked for 2 minutes and quit working. I contacted Shark Audio via email since that is the ONLY way you can get in touch with them. And NEVER received a reply back. I asked to return the amp for inspection and again not a return email.
So...IF you are thinking of buying one of these...DON'T! Save your money and get something that works.
Pretty disappointed in their customer service. They lost me for a return customer and I will tell everyone that ask about them the same.