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Message: <blockquote data-quote="Haunz" data-source="post: 5073467" data-attributes="member: 576010">The OP was asking about motors as a whole.. not just the magnet.. but FYI, both the magnet and the steel in the motor are primarilly made up of ferrite.. that should tell you that they will have some similar properties; and while the magnet will have a lower thermal conductivity then the steel in the pole &amp; plates it's not exactly an insulator either... //content.invisioncic.com/y282845/emoticons/rolleyes.gif.c1fef805e9d1464d377451cd5bc18bfb.gifIf you are going to add sink material to a motor it makes sense to use copper or aluminum, hence the fins on the JBL.. that still dosen't change the fact that the motor alone sinks heat away from a coil and disipates it into the air around the sub...I recall this being discussed by some industry memebers over on carsound back in the day.. including a rep from JBL..</blockquote>

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