That's my take on it too. It's impossible for a single driver to match the polar response, distortion levels, bandwidth, dynamic range and linearity of a multi-way speaker. That in mind, it doesn't mean single drivers are completely bad and unlistenable. I've seen lots of people use them with success (Fostex seems to be talked of very well), it's just that they cannot match what a multi-way speaker can do. What fullrange driver did you use by the way?

The front speakers in my system also utilize horns, and are 3-way type.

Adrian