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<blockquote data-quote="blazian87" data-source="post: 8430113" data-attributes="member: 574798"><p>I never heard of a -12db slope automatically flipping the polarity of the driver. Where did you hear that from? and what is the logic behind it? From what I thought, reversing the polarity digitally is only done when you accidentally switch the + and - on the wire. Usually you pick whatever is louder, which is usually the normal phase. I guess depending on the application, sometimes reversing the phase can help the driver play a different way. It definitely sounds different, but I prefer to keep everything in phase. I also heard something about reversing the polarity on the sub so that it brings the sub stage closer up front, but I don't know how true that is.</p><p></p><p>Your second question though.. I don't think it's a good idea to put more than 1 crossover on a driver because it would interfere with each other. Like in your example HP 3k @ -12db and 4k @ -6db, I would assume it would act like a 4k @ -6db but with a sharper cutoff in the lower frequencies causing a slight dip in that area. But maybe you want to do this so you can still have your shallow -6db slope but without having the tweeter playing too low and damaging the tweeter I guess. That could be a possibility. I just don't think a -6db slope is a good place to start from because it tends to play too many frequencies at once, making it sound almost like a full range speaker with a little attenuation on the lower spectrum. It will not become a -18db slope combining them because -18db is much sharper than both of them so that's impossible. So if you can visualize how it looks on a graph, it'll look like a very shallow curve overall with a slight drop on the low end.</p></blockquote><p></p>
[QUOTE="blazian87, post: 8430113, member: 574798"] I never heard of a -12db slope automatically flipping the polarity of the driver. Where did you hear that from? and what is the logic behind it? From what I thought, reversing the polarity digitally is only done when you accidentally switch the + and - on the wire. Usually you pick whatever is louder, which is usually the normal phase. I guess depending on the application, sometimes reversing the phase can help the driver play a different way. It definitely sounds different, but I prefer to keep everything in phase. I also heard something about reversing the polarity on the sub so that it brings the sub stage closer up front, but I don't know how true that is. Your second question though.. I don't think it's a good idea to put more than 1 crossover on a driver because it would interfere with each other. Like in your example HP 3k @ -12db and 4k @ -6db, I would assume it would act like a 4k @ -6db but with a sharper cutoff in the lower frequencies causing a slight dip in that area. But maybe you want to do this so you can still have your shallow -6db slope but without having the tweeter playing too low and damaging the tweeter I guess. That could be a possibility. I just don't think a -6db slope is a good place to start from because it tends to play too many frequencies at once, making it sound almost like a full range speaker with a little attenuation on the lower spectrum. It will not become a -18db slope combining them because -18db is much sharper than both of them so that's impossible. So if you can visualize how it looks on a graph, it'll look like a very shallow curve overall with a slight drop on the low end. [/QUOTE]
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