I had this idea for a bookshelf without a specific driver in mind. It would be something like an anarchy 5.25" or 6.5" midwoofer with either one or two midrange speakers side by side up top along with maybe a ribbon tweeter above them in a sealed box. The jack would be at the back and will have the wire glued in the corner going up the port, along the top to a crossover embedded in the little wall and then down to the woofer/midwoofer. Inside the smaller box would be another crossover for the mids and tweeters. Hoping to get it done with a 5.25" and have a decent bass range with minimal space taken up. That way I can put 100+ watts into it and have an excellent sound all around. I have a rough draft made up in paint.