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Subwoofers
Benefits of bigger magnet subs?
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<blockquote data-quote="hispls" data-source="post: 8625718" data-attributes="member: 614752"><p>Of course most of these "more power handling" things all = less efficient. Stiff suspensions, bigger coils, heavier cones, big donut surrounds.</p><p></p><p></p><p>This is also true in Ferrite motors, though beyond 10" you hit a point of very diminishing returns so that's where they've pretty much capped out.</p><p></p><p></p><p>That can't be much of a difference when you're dealing with such large pieces. What a pound difference in a 60 pound woofer?</p><p></p><p>Anyway, the topic of grades of magnet (and steel) is also very important. There's a reason cheap stuff is cheap and cheap materials is a great place to cut corners and cost while the consumer is left completely in the dark. We can't see the difference in grades of magnet and steel but they make a huge difference in performance. This is also a worry dealing with those Chinese buildhouses (who know this) and may well send you a great prototype then change materials in your production run leaving you with something that looks the same but performs poorly.</p><p></p><p>As it has been said, the distance of the gap is way more important than the size of the magnets. Magnetic force is an inverse square to the distance so halving the gap width squares magnetic force in there. The tradeoff is that most buyers want a huge power rating and a tight gap with a light coil isn't how you get that. Really 99% of the market would rather brag about them (or usually a guy they know) "throwing double rated power all day" at a sub than be able to get just as loud with a quarter of that power.</p><p></p><p>Safe to say the companies who are actually doing R&amp;D take many factors into consideration and the big guys or those who build in-house can (at least mostly) control the quality of materials stays true. Others just take whatever China gives them and roll the dice. The buyers see a big heavy sub with some inflated power rating number on it and it makes some noise so they're happy. I wonder if all those "brands" selling the Alibaba DD-Z knockoffs can be assured that those motors are made with the same specs, tolerances, and materials as DD uses?</p></blockquote><p></p>
[QUOTE="hispls, post: 8625718, member: 614752"] Of course most of these "more power handling" things all = less efficient. Stiff suspensions, bigger coils, heavier cones, big donut surrounds. This is also true in Ferrite motors, though beyond 10" you hit a point of very diminishing returns so that's where they've pretty much capped out. That can't be much of a difference when you're dealing with such large pieces. What a pound difference in a 60 pound woofer? Anyway, the topic of grades of magnet (and steel) is also very important. There's a reason cheap stuff is cheap and cheap materials is a great place to cut corners and cost while the consumer is left completely in the dark. We can't see the difference in grades of magnet and steel but they make a huge difference in performance. This is also a worry dealing with those Chinese buildhouses (who know this) and may well send you a great prototype then change materials in your production run leaving you with something that looks the same but performs poorly. As it has been said, the distance of the gap is way more important than the size of the magnets. Magnetic force is an inverse square to the distance so halving the gap width squares magnetic force in there. The tradeoff is that most buyers want a huge power rating and a tight gap with a light coil isn't how you get that. Really 99% of the market would rather brag about them (or usually a guy they know) "throwing double rated power all day" at a sub than be able to get just as loud with a quarter of that power. Safe to say the companies who are actually doing R&D take many factors into consideration and the big guys or those who build in-house can (at least mostly) control the quality of materials stays true. Others just take whatever China gives them and roll the dice. The buyers see a big heavy sub with some inflated power rating number on it and it makes some noise so they're happy. I wonder if all those "brands" selling the Alibaba DD-Z knockoffs can be assured that those motors are made with the same specs, tolerances, and materials as DD uses? [/QUOTE]
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Benefits of bigger magnet subs?
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