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Message: <blockquote data-quote="jimrhit" data-source="post: 2640219" data-attributes="member: 573319">The steel parts of the motor do act as heatsink, however, the are 4 times less thermally conductive as Aluminum....hence the use of Aluminum fins and such for cooling purposes.Al can simultaneously act as a shorting ring in a motor (it needs to be quite large in subwoofers .. ~3x larger than a copper one) ... so you can double dip on this ... you get better power handling as well as lower distortion</blockquote>

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