Put the Boston GT42 amp in and bridged it to the mids which doubled the power and, while the midrange got a little louder, the midbass got dramatically louder. I had to raise the xover point to 63hz 24db slope to keep them from bottoming on really punchy song and breaking up in the midrange on other songs. After playing around and getting them to blend with the tweets like before the amp change, I decided the increase in volume I got in the midrange performance wasn't worth me having to raise my xover point and slope to accomodate (and putting so much stress on the speakers) so I went back to the Aura amp. and the Boston amp will probably be used for my tweets and rears. I will also be looking into other drivers that will take the power of the Boston amp a little better if need be.