They are Shark. I ordered them from Sharkmotorcycleaudio.com. They were not expensive. The wiring for rear speakers is already under the seat so I just cut the connectors off and butt spliced the wires together. They come with mounting brackets but I didn't use them. I got some longer 4mm screws and some washers then just drilled 2 small holes through the trunk and mounted them to it. I ran the wire between the chrome trim and the frame. It took me a total of about an hour, but I took my time. I could have done it in half that time if I was trying.
2012 Vulcan 1700 Voyager