Where do you buy your x-over components?

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I've noticed madisound and solen and partsexpress don't have 12 gauge iron core inductors or 12 gauge inductors at all for that matter. Although they solen has 10 gauge air core, so that's okay I think. But I was looking for 12 mH 12 gauge iron core.

Also anybody know of a link that would let me learn about the different kinds and quality of x-over parts?
 
Interesting . . .

Apparently 12 gauge inductors are really expensive, I need 2 - .9 mH, 2 - .7 mH, and 1 - .5 mH inductor. That's about $105 at http://www.northcreekmusic.com/CoilPrices.htm I thought that was a lot, then I remembered that it was just for one speaker :eek: Also I need another 2 - 12 mH iron core inductors and a bunch of caps and resistors. If I go this route, I will pay more for the inductors than my all 6 - drivers.

http://zalytron.com/ was very resonable compared to this at about 40 % of the cost of the first site for inductors. But I would have to go with 14 gauge inductors.

I think I will search the forum tomorrow to find out how to wind my own inductors. I think I already know how, but I'm not sure if it's as easy as I think it is and I definately don't know what kind of wire to use and also where to get it.

Or should I just go with the 14 gauge? I was told by Alvaius (he designed this x-over, that some of you have seen me beg him for) to use 12 gauge inductors for woofers and 16 gauge minimum for the tweeter.
 
Thank you for the sites . . .

Looks like if I want to buy 12 gauge inductors, it will run me about $300 for the x-over. So I think I'm left with 3 choices:

1) Wind my own inductors, which I don't know if I can do. Have to do some research I think.

2) Or should I can go with 14 gauge inductors.

3) Or (the cheapest solution) I have a bunch of 18 gauge 1.0 mH inductors. I can make them into .9 mH or .7 or .5 mh. They're not air core though, I think. I'm assuming I should use air core for the midwoofer and tweeter. And I'm also assuming that (like the name suggests) air core inductors have an air core or inotherwords are hollow. If that's the case these are not air core.


What would you do in this situation? And what do you think I should I do in this situation?
 
wind your own!

There was a couple of good threads recently here about winding your own..... try searching for inductor or winding etc

I picked up enough magnet wire to make 4*12g 0.33mH inductors for A$23 (about US$12) - the speakers sound great.....
buy an inductance meter and wind your own, you will still be $$$$$ on top...... it is good fun, and satisfying too :)

good inductor sim page

http://www.oz.net/~coilgun/mark2/inductorsim.htm

another

http://www.colomar.com/Shavano/inductor_info.html
 
wind your own!

There was a couple of good threads recently here about winding your own..... try searching for inductor or winding etc

I picked up enough magnet wire to make 4*12g 0.33mH inductors for A$23 (about US$12) - the speakers sound great.....
buy an inductance meter and wind your own, you will still be $$$$$ on top...... it is good fun, and satisfying too :)

good inductor sim page

http://www.oz.net/~coilgun/mark2/inductorsim.htm

another

http://www.colomar.com/Shavano/inductor_info.html
 
I found some very good threads. Learned that I need magnet wire for inductors. Also when they say "iron core" or "air core" I thought they meant the wire inself:xeye:, not the center of the inductor. Can you subsitute steel for iron, since iron is hard to get I think? Does anybody know where to get magnet wire? I need 800 ft. or 15 lbs. of 12 gauge wire. Also I saw some company selling square wire. Will this work instead of round wire?
 
You definitely need magnet wire - it is copper, covered in a thin enamel coating.... should be easy to find - try auto electrics shops (they rewind car alternators) or their suppliers..... iron core inductors generally aren't recommended for audio work.........

have fun
 
Okay, I'm looking for 12 gauge wire

I need 4 - .9 mH, 4 -.7 mH, 2- .5 mH, and 2- iron core 12 mH. I got an offer of $48 for 12 lbs of 14 gauge magnet wire (I think it's enough, weight or length). But I'm not sure yet if going with 14 gauge is okay. I did not design the x-over I'm using.
 
The decision regarding what gauge wire to use comes down to how much power you are going to run through it. Note, too, that if you use a smaller guage wire, the Q of the inductor will be a bit different (as will the series resistance) and, in some cases, that may affect how the crossover works.

In general, go with what the designer says to use. For simple crossovers, a little higher wiring resistance won't matter, but it might for complex crossovers, such as for when a notch function is being implemented. So, if your crossover is simple, the smaller wire might be just fine.

I don't understand the need for an iron core inductor. These are generally a no-no in audio filters. I think steel would work, but the main reason to use iron over air is to get more capacitance out of a given number of turns of wire. Using iron core in the power supply is fine, but never in the signal path.
 
.91mH $36.76 $13.56
.75 mH $32.88 $12.10
.68 mH $30.90 $10.08(.51mH)
12 mH $123.11 $45.37

All prices are in canadian dollars and are a few years old. The first price is for the standard 12 gauge, and the second is for standard 14 gauge. I would recommend using the Hepta-Litz inductors as they are only a couple bucks more per inductor. The valus above are not the exact you require as that is all thats in the price list. The do wind the inductors there, and will wind to whatever value that you require.

Also, they are all air-core. They do not offer an iron core.

Jeff
 
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