Speakers

[Yamahonda123]

Last night my sub went out on my 680 system. I was out of my room and when I got back I could smell a burning all and when I got back music was coming through the satellite speakers but not the sub. The fuse in the back looks fine. But I think it's in the amp. Is there anything I can look for on the amp to replace? Already took the sub out and I don't think there is any power getting to the sub that's why I think it maybe in the amp. Any input would be a big help, thanks!