narrow bandpass xover with zobel?

Anyone know how to calculate a narrow bandpass xover with 4rth order on the highpass and 2nd on the lowpass?? can a zoebel be added?? can I make a 4rth highpass the feed that into a 2nd lowpass?? THANKS

Not sure why you would want that particular topography, but sure.  You want the math, or a website with calculators, or are you looking for someone to calculate it for you?Support the12volt.com

Hi, thanks fo the quick reply!! I want to run my woofs close to the sub, but keep from getting into trouble with the boomies the high end is much less critical I can do the figuring, no sweat just need the calculators, and a warm fuzzy that I'm covering 20-20K fairly flat. I do have some q's on the concept of flipping phase on the top half of a L-R xover and how/if that would apply to a narrow pass tri=amped setup IE is there a hole in the response where I change from one amp to the next?

you have PM.Support the12volt.com

So you are looking to passive x-over a woofer with a 24db/oct for the H.P. and a 12db/oct for the LP? Curious why these slopes? Why Asemetrical? (Sp?) You are going to have losses due to 3 Coils and 4 Caps plus a resistor (zobel) per speaker. When you start filtering woofers that low you are looking at some hefty Inductor values. Depending on power, you will need 14 AWG or larger coils to keep down loss. Most likely be an iron core. Depending on power, Electrolytics' may not cut it for the caps. Teflon, Metal/Poly, or Mylar you are looking at some $$$.

ok

audiocableguy is 100% right, but I'm still trying to figure out what the OP wants to do, even after a few PMs.  meicalnissyen, please describe your plan here for all to help.Support the12volt.com

ok cd5444 nonfader set to 200hz and feeding big amp and pair of alum 8's in nice box rear outputs to main amp channel 1 and 2 feeding a pair of 8' woofs in enclosures target 200 ~ 1500hz   ,   front outputs to channel 3 and 4 feeding two pairs of 5" sealed back midranges target1500~4000hz and y'ed to the tweet amp feeding a pair of 2.5 cones and 5/8 domes,   cones 4k to 10k and domes 10k and up I have currently a pair of legacy lxr-7's divvying this up BUT i have a nasty whine I have fought and beat and had come bak I believe it is internal on the lxr's worse in the am when dew is out I am getting rid of the actives and all the extra wiring NEED good calculator site Think zobel circuit on mids a good idea Welcome thoughts from the group

The above answer from me was based on the "assumption" of a 4 ohm M/B operating from 80hz-400hz with the slopes you said. 24db/oct and 12db/oct. The H.P. would be 780mF, 750mF, 2.6mH, 15mH. The L.P. would be 2.3mH, 68mF Plus the Zobel I was way off after seeing this: 8" Subs L.P @ 200hz 8" woofers from 200hz-1.5khz 5" x2 Sealed Mids 1500hz-4Khz 2.5" Mid Mids from 4khz-10Khz 5/8" Tweeters from 10Khz At this point Zobels are least of your worries! 1. The less Crossover points the better, active or passive. 2. The fewer number of different size and brand drivers the better. 3. The last place you want to start dividing frequencies is in the upper vocal range. This is as far as I'm willing to go. Good Luck...

I did do the math using partsexpress as a source for pricing. Info provided. 200hz -1500hz. Solen Std.Caps, Erse Coils and Iron core for the largest coil. $230 per speaker. Electrolytics could be used to reduce costs, the coils alone are $76 per. A decent amp with an active x-over would eliminate alot of headaches.