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Low Earth Orbit
DIY Audio
3x12+2"wNL8's&4Xti4000's
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<blockquote data-quote="Ivan Beaver" data-source="post: 50248" data-attributes="member: 30"><p>Re: 3x12+2"wNL8's&4Xti4000's</p><p></p><p></p><p>I am not arguing about your loudspeakers-All I am trying to do is to "clear up" some misconceptions about passive crossovers.</p><p></p><p>If using decent quality parts-there is no appreciable loss through the part-EXCEPT for the freq that the cap or coil is trying to filter out anyway. Within the intended passband-you will never know that the part is even in the circuit.</p><p></p><p>Regarding large speakers-yes you have to use large passive parts (because of the higher voltage and current). But in MANY cases- you cannot do a proper passive crossover-because the "time of flight" from the various devices is so far off-you have to have delay to attempt to line them up (even if only at a single point in the listening plane-other places will need different delays-so you have to choose one point and "live with it").</p><p></p><p>While you can get a little bit of "correction" by using the phase shift associated with caps and coils-they are limited. So if the cabinet is physically "out of whack", you have to resort to an active alignment.</p><p></p><p>Just don't automatically say that "the use of caps and coils" is bad-it is only bad-when used improperly. Just like an active setup.</p><p></p><p>The nice thing about a passive setup-is that it is pretty hard for the user to "screw it up". Just plug it in and go. With an active setup-if an amp goes down and you replace it with an amp that has a different gain-the sound is going to be out fo balance. Of if somebody messes with the crossover freq-or delay time etc etc.</p><p></p><p>There is no "perfect" setup-only perfect for a particualr situation.</p></blockquote><p></p>
[QUOTE="Ivan Beaver, post: 50248, member: 30"] Re: 3x12+2"wNL8's&4Xti4000's I am not arguing about your loudspeakers-All I am trying to do is to "clear up" some misconceptions about passive crossovers. If using decent quality parts-there is no appreciable loss through the part-EXCEPT for the freq that the cap or coil is trying to filter out anyway. Within the intended passband-you will never know that the part is even in the circuit. Regarding large speakers-yes you have to use large passive parts (because of the higher voltage and current). But in MANY cases- you cannot do a proper passive crossover-because the "time of flight" from the various devices is so far off-you have to have delay to attempt to line them up (even if only at a single point in the listening plane-other places will need different delays-so you have to choose one point and "live with it"). While you can get a little bit of "correction" by using the phase shift associated with caps and coils-they are limited. So if the cabinet is physically "out of whack", you have to resort to an active alignment. Just don't automatically say that "the use of caps and coils" is bad-it is only bad-when used improperly. Just like an active setup. The nice thing about a passive setup-is that it is pretty hard for the user to "screw it up". Just plug it in and go. With an active setup-if an amp goes down and you replace it with an amp that has a different gain-the sound is going to be out fo balance. Of if somebody messes with the crossover freq-or delay time etc etc. There is no "perfect" setup-only perfect for a particualr situation. [/QUOTE]
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