[kryptonitewhite]

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/foru...ii-landed.html

 

[Steven Kephart]

Changing from a single 2 ohm to a dual 2 ohm coil should have a large impact on the parameters and performance of the sub. The coil length or thickness will have to be changed to obtain the new DCR to supply that impedance. And because of that change, most of the other electrical and physical parameters will be affected as well. Now if you mean that you changed from a single 2 ohm to a dual 4 ohm, then no there wouldn't be significant differences since it is the same coil just wired differently assuming they are using a 4 layer coil to begin with.


As for the paint there will be some effect as you did add more mass. However it is questionable on whether the change would be audible. The effect would be a lower Fs along with a lower efficiency. I guess it depends on how thick and what type of paint you used.


Re directly effects the BL which is why the Maelstrom's rating changed with the new coil configuration. There is no added coil length, just a change in how it is wired. A voice coil is wound by running wire down and back up giving you 2 layers and then down and back up again for a 4 layer coil. You can either parallel/series the two coils under the dust cap for a single voice coil sub, or run each individually at twice the impedance for a dual voice coil sub.