I loaded the driver into an Adire Alignment box, put the level on the lowest setting and turned it on for the first time. Very little came out as I incresed the volume and what did was "crunchy" and distorted. The speaker sounded like it was blown. The sound gets better if I support the cone slightly with my hand, but still not clean and deep. I modified the design, but kept the internal volume the same. The ends of the ports are right over the driver, though. Not sure if this has relevance, but more info may help. Thanks.