Not sure if the 61b has drilled holes but I've added these to cases before. Easy to drill and mount. I have bought many things from performance-pcs.com and have been happy with every transaction, very good group of poeple.
These speakers are actually very easy to take apart. I did the same thing everyone is talking about. First, take the two screws out on either side of the wire connections on the back. Then remove the front cover to expose the speaker and remove the rubber plugs that the covers pushes into...