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Car Audio Discussion
General Car Audio
Noob question about active crossover and amp settings
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<blockquote data-quote="fly_marlin" data-source="post: 8399483" data-attributes="member: 660781"><p>Mostly right, but the stuff about x-over slopes is a bit off. Having a sharper slope on an x-over doesn't make anything play muddy. In fact, almost the opposite is true. For example, if you have a midwoofer that sounds a bit muddy down low and you have it crossed at 120Hz at 12db, crossing it at 18db or 24db may in fact make it sound clearer as it now plays less bass. At that, it can also handle a little more power. You have to play with the x-over points as well, for example moving it to 150Hz at 12db rather than 120Hz at 24db. This is why SQ folks are so concerned about picking drivers that can play well across a wider spectrum. You don't want to cross your sub much higher than 80Hz, so you would want to have a mid you can cross at 120Hz or even lower so it can pick up right where the sub left off. But if your mid is lacking in that range, you'll be stuck between having some muddiness or just lack of music in that range. Same goes with mid/tweeter pairing.</p><p></p><p>If your speakers originally came with passive x-overs, find out how they were crossed and use that as a starting point on your HU. In my opinion though, the biggest gain for you would be the ability to TA tweeters and mids separately. As for x-overs, most well made passive x-overs already blend the mid/tweeter together pretty well.</p></blockquote><p></p>
[QUOTE="fly_marlin, post: 8399483, member: 660781"] Mostly right, but the stuff about x-over slopes is a bit off. Having a sharper slope on an x-over doesn't make anything play muddy. In fact, almost the opposite is true. For example, if you have a midwoofer that sounds a bit muddy down low and you have it crossed at 120Hz at 12db, crossing it at 18db or 24db may in fact make it sound clearer as it now plays less bass. At that, it can also handle a little more power. You have to play with the x-over points as well, for example moving it to 150Hz at 12db rather than 120Hz at 24db. This is why SQ folks are so concerned about picking drivers that can play well across a wider spectrum. You don't want to cross your sub much higher than 80Hz, so you would want to have a mid you can cross at 120Hz or even lower so it can pick up right where the sub left off. But if your mid is lacking in that range, you'll be stuck between having some muddiness or just lack of music in that range. Same goes with mid/tweeter pairing. If your speakers originally came with passive x-overs, find out how they were crossed and use that as a starting point on your HU. In my opinion though, the biggest gain for you would be the ability to TA tweeters and mids separately. As for x-overs, most well made passive x-overs already blend the mid/tweeter together pretty well. [/QUOTE]
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