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<blockquote data-quote="audioholic" data-source="post: 5071010" data-attributes="member: 549629"><p>Its amazing, you just conceded every point I made, while sounding as if you disagree with me, on all of it.</p><p>The 'medium' versus 'large' comment was to avoid someone (you) from trying to compare a Nightshade motor to a Funky Pup. I think this was obvious. Your sarcastic "I didnt know subs came in medium" comment only shows you are angry, for some reason. Care to share the reason why with the whole class?</p><p></p><p>Your 20lb versus 40lb motor not displaying double the surface area would seem to agree with my comment "...the relatively small difference in surface over a 'medium' motor and a 'large' motor..." Even in a doubling of weight (approx going from a single stack to a double stack... not quite because f top and bottom plate) you concede you will not receive a doubling of surface area. Now how about a less extreme example, like going form a double stack to a triple stack? Significantly heavier motor, not very much increase in surface area however (especially considering the shape of the magnets and their stacked position, not at all optimized for surface area cooling). Very little extra cooling will be received from the third slug, but it does increase the mass of the motor significantly.</p><p></p><p>The DD example you cited has holes drilled for 'direct cooling' of the coils, iirc. This allows cool air to be more easily dispersed across the coil and through the motor, not simply to increase surface area for convection purposes. In either case, its certainly not an example of a motor cooling better because its physically larger.</p><p></p><p>The GTi example you use, was exactly my point. Some companies, like JBL, add hinksinks to make the motor surface are a more substantial part of the cooling process with their drivers. And those designs lend themselves to the size of the motor making an significant difference in cooling, again by design. But to use your own logic against you, maybe the fact that so many companies DONT use heat sink fins on their motors should tell you the limited role it plays in cooling versus more traditional methods.</p><p></p><p>If surface area plays such a significant role in motor cooling, how do neo motors still have high power ratings? Their surface area is modest, even compared to the smallest of ferrite motors.</p></blockquote><p></p>
[QUOTE="audioholic, post: 5071010, member: 549629"] Its amazing, you just conceded every point I made, while sounding as if you disagree with me, on all of it. The 'medium' versus 'large' comment was to avoid someone (you) from trying to compare a Nightshade motor to a Funky Pup. I think this was obvious. Your sarcastic "I didnt know subs came in medium" comment only shows you are angry, for some reason. Care to share the reason why with the whole class? Your 20lb versus 40lb motor not displaying double the surface area would seem to agree with my comment "...the relatively small difference in surface over a 'medium' motor and a 'large' motor..." Even in a doubling of weight (approx going from a single stack to a double stack... not quite because f top and bottom plate) you concede you will not receive a doubling of surface area. Now how about a less extreme example, like going form a double stack to a triple stack? Significantly heavier motor, not very much increase in surface area however (especially considering the shape of the magnets and their stacked position, not at all optimized for surface area cooling). Very little extra cooling will be received from the third slug, but it does increase the mass of the motor significantly. The DD example you cited has holes drilled for 'direct cooling' of the coils, iirc. This allows cool air to be more easily dispersed across the coil and through the motor, not simply to increase surface area for convection purposes. In either case, its certainly not an example of a motor cooling better because its physically larger. The GTi example you use, was exactly my point. Some companies, like JBL, add hinksinks to make the motor surface are a more substantial part of the cooling process with their drivers. And those designs lend themselves to the size of the motor making an significant difference in cooling, again by design. But to use your own logic against you, maybe the fact that so many companies DONT use heat sink fins on their motors should tell you the limited role it plays in cooling versus more traditional methods. If surface area plays such a significant role in motor cooling, how do neo motors still have high power ratings? Their surface area is modest, even compared to the smallest of ferrite motors. [/QUOTE]
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