A mounting bracket system for mounting a loudspeaker monitor onto a microphone stand pole without requiring disassembly of either the loudspeaker monitor or the microphone stand. Two sections joined by hinges to a spine, formed principally of plastic and paperboard materials, fold into a book or album-like structure to house the product components. An end cap located at the other end of the through hole, is connected with the housing and adapted to rotate relatively to the housing.