A while back I ordered a custom recone kit going from a single 2 to a dual 2 coil, and I was wondering if there would be any noteable increase in power handling, Mms, and efficiency as well as a lowering in Fs since there will be double the coil... but I think i was mostly told not enough to be note worthy.

Later on I painted the cone, and suddenly I was being told I would totally mess up the drivers SQ and SPL by adding mass and making the cone stiffer (obviousely mostly by noobs and tards)

Anyway, Exodus Audio's GEN II Maelstrom-X came out. Basically the only change was going from a single 4 to a dual 2 coil. The added coil length was enough that they changed the power rating and Bl rating.

http://www.hometheatershack.com/forums/exodus-audio/19584-maelstrom-18-gen-ii-landed.html

<br />A while back I ordered a custom recone kit going from a single 2 to a dual 2 coil, and I was wondering if there would be any noteable increase in power handling, Mms, and efficiency as well as a lowering in Fs since there will be double the coil... but I think i was mostly told not enough to be note worthy.<br /><br />Later on I painted the cone, and suddenly I was being told I would totally mess up the drivers SQ and SPL by adding mass and making the cone stiffer (obviousely mostly by noobs and tards)<br /><br />Anyway, Exodus Audio's GEN II Maelstrom-X came out. Basically the only change was going from a single 4 to a dual 2 coil. The added coil length was enough that they changed the power rating and Bl rating.<br /><br /><a href='http://www.hometheatershack.com/forums/exodus-audio/19584-maelstrom-18-gen-ii-landed.html' class='bbc_url' title='External link' rel='nofollow'>http://www.hometheat...-ii-landed.html</a><br />

Notice it says "This dual 2-ohm coil is a little stouter than our last coils."

The sub was redesigned, so other changes could be made (if required) for the improvments to the coil.

In the case of your IB sub, there were no other changes, so you can only get so much coil on the former and fit it in the gap correctly without rubbing.