crown amp

Hey all, here's the pic, I went through the unit with my tester and I can't get a reading from either of these. Anyone know off hand what they are, or what they do? Were could I get them? Thanks in advance. Anthony

HI all, first forum, hope all is well. Hope i'm in the right place. I just recieved an dc300a from a neighbor cleaning out his garage, (free by the way) yup score well see maybe someone here can help me out here's the thing he said it he remembers it working 20 years ago when he put it up at...