QUAD 2905

Hi, I ma currently stationed in Serbia. I have popping sound problem with one of my Quad 2905 speaker. There is no certified technician in Serbia or in near by Croatia. Does anyone know of a certified Quad service in Austria, Hungary, Slovenia, Germany who would be able to do the diagnostics and repair? Thanks
 
Hi, I ma currently stationed in Serbia. I have popping sound problem with one of my Quad 2905 speaker. There is no certified technician in Serbia or in near by Croatia. Does anyone know of a certified Quad service in Austria, Hungary, Slovenia, Germany who would be able to do the diagnostics and repair? Thanks
Hungary: Popori Ottó

He's not certified by QUAD, but better than original QUAD.