I can understand that. Driving the DA 42% more is adding more bass, like a loudness control. My main concern while I decide if I want to do this mod is what will the bass be like at moderate to loud levels. I can't get my mind around if adding more output in the 15 Hz to about 2 Khz range will make the speaker better. It will certainly change the bass/midrange/treble balance somewhat from the original sound.
DK, you think the positive benefit is still there when you drive them hard?