Hi everyone. I have a hartke 3500 that is need of a component. I'm still learning so thank you for bearing with me.

   The area in question is the power amp I think. The part number from the board is Q 310 ,and I'm pretty sure its a transistor. Its totally destroyed and in need of replacement. The numbers off of the part itself are:          K
                                                                                                 A968A
                                                                                                 Y  241
  I haven't had much luck on the net. So I'm asking where I could go to get that part or its equivalent. Any help will be appreciated.