The mechanical and electrical aspects of a driver have to be specifically tuned to operate without some type of a box enclosing them. If you try to do with a typical driver that is not specifically designed for it, the results are not very good.
We are going through the same thing on this end. One of my friends wants four stereo pairs of speakers spread throughout the house. They will be mounted into the ceiling, using the attic as the enclosure. She is not an audiophile and simply wants decent quality sound at a reasonable price. Since i can't find anything reasonably priced that works well, we are resorting to buying separate woofers that are designed for this type of installation with tweeters and manually mounting them coaxially. Seems like a lot of work, but it should work better than anything else that i've found at anywhere near the price. Sean
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