Hello I have a JVC RX-660VBK Surround reciever The rear speakers won't work or the active sub . . front speakers work but with not muc volume centr speaker works If turnin gon ra speaker in Logic mode cancs out alll sound. . . The controls al work vol. front and rea controlsas wll mode setting also works. . Are thre multi fuse in side unit that might be replaced or anythg that might need to b plugged. Theinsidof amp loks lke thereare cards installed in to a circut baord. . Also amp doesn't sound lke a 100 watt channel amp . Is the 100watts a rea 100watts per channle ? I also can't get a ser or usermanauls for downlaod either Speakers I'm using pair of Wharfedale at 50 wats a speaker rear speakers Sanyo 40 watts centr smal radio scach driver rated at 40 wats. and new Phillips 30 active sub. . I wish to use amp for mixing un my digital recording studio I have audio software for mixing in 5.1 Many thanks Jim Manning Spit Fire Audio Toronto

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