I was as very impressed as well. I bet they would sound great in a Twin. Even the Jensen Neos I heard demos of sounded pretty good. It seems like Neo guitar speakers have definitely improved in tone these days, or at least, there are more decent offerings to pick from now. I might consider buying a set of Neos if someone I trusted could reliably guarantee me a lively JBL-esque tone from them so if you grab one I def wanna know how that Copperback works out. I think Neos might offer some promise in that regard because smaller powerful neo is kinda like big fat alnico in terms of response but there just aren't a lot of users posting online experiences enough for me to throw dough at it. Blessings to you today brother.