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Multi-Way Conventional loudspeakers with crossovers

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Old 5th February 2013, 10:08 AM   #31
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hehe, I did a search for frd consortium and when I clicked the link it came up with some canadian pharmacy trying to sell me viagra I've just been having a look at the box modeling program (I normally use unibox). It looks nice! I like that it has the group delay modelling. I can't see any way to export the box response though...

Tony.
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Old 6th February 2013, 07:04 AM   #32
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Have downloaded Bagley and my head is swimmimg....!
Even if I figured out the design, and bought all the components, I don't have much experience with a soldering iron and then my crossover may not work anyway.

Have found these 375-3000 Hz crossovers from Parts Express in USA.
Shipping is almost as much as crossovers!

Don't see much alternative other than taking a crash course for next 6 months in electronics...

I need a Panadol
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Old 6th February 2013, 07:16 AM   #33
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Don't stress, people here are happy to help people who ask in the proper manner. It has taken me 12 years to get a grip on the basics. Those generic XOs from PA are no where near as good as mdesigning and making your own
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Old 6th February 2013, 07:53 AM   #34
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Quote:
Originally Posted by Stevenn View Post
Have downloaded Bagley and my head is swimmimg....!
Even if I figured out the design, and bought all the components, I don't have much experience with a soldering iron and then my crossover may not work anyway.

Have found these 375-3000 Hz crossovers from Parts Express in USA.
Shipping is almost as much as crossovers!

Don't see much alternative other than taking a crash course for next 6 months in electronics...

I need a Panadol
I don't disagree that this crossover stuff induces Panadol taking. Also, US shipping seems to have shot up recently (it was never "good value", especially if you're in Australia). If you can find a source of reasonably-priced inductors, you're halfway there because they're the most highly-priced items in a crossover, if you discount some of the high-end capacitors. Try European suppliers perhaps- PE sells Jantzen inductors which are made in Poland.

As for making a crossover yourself, it's not really as hard as it looks- the scary part is the design. Once you have that, a piece of thin MDF will do as a base, the various parts aren't all that hard to join up, minimal soldering skills are required. You could quite possibly use screw connectors and avoid soldering altogether, much more skilled afficionados might comment on that possibility.

You can also get pre-made crossover circuits reasonably cheaply out of China (say, AUD 25 each + quite cheap postage) and you then have the basic circuit, and if the inductors are "in the ballpark" it's quite cheap to change the capacitors. I used a pair from China, the caps are the red "Audiophile" type which it has been suggested should be changed, as 3 of them are 3.3 to 6uF, this wouldn't be overly expensive and is a course I will take in the near future to better suit my drivers and desired crossover points. Just be aware that stuff out of China takes forever to come, their postal system is far from efficient.
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Old 6th February 2013, 07:59 AM   #35
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Forgot to put in link:

Dayton Audio XO3W-375/3K 3-Way Crossover 375/3,000 Hz 260-150

Cheers
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Old 6th February 2013, 08:19 AM   #36
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Steve, When you get to the point you are wanting to hook up a crossover, I can probably lend you the pre-builts out of my old three ways. They are ones I bought from Jaycar years ago and I think that they are 500Hz / 3000Hz crossover points.

From memory I paid about $80 each for them, and that is probably around 23 years ago so was quite a bit of money!! I do have another cheaper set (maybe) somewhere which were the ones I had before those. They had 800/5000 crossover points I think and sounded terrible in comparison with my drivers.

The "good" ones would at least allow you to do an evaluation of what a pre-made crossover could sound like. You might be entirely happy with it, but you might not be either

I bought my capacitors for my two way at partsconnexion (very good price on axon true caps), and for the inductors I wound my own. But speakerbug has very good prices on inductors if you aren't interested in winding your own

I can understand your reluctance at designing your own crossover. Probably a large part of the reason my MTM's sat unfinished for around 5 years was due to being scared to do the crossovers! In the end though I got there, and I couldn't be happier with the result.

Tony.
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Old 6th February 2013, 08:25 AM   #37
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Me, I'm a firm believer in jumping in at the deep end. I the first pair of speakers I ever made were 3-Ways and hey wee almos peec is o, Nee een ha lucky since
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Old 6th February 2013, 08:53 AM   #38
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Thanks for the tip on speakerbug, Tony. Their prices look really good, especially when local postal rates are factored in. As a matter if interest, where do you obtain wire suitable for inductor winding?
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Old 6th February 2013, 09:13 AM   #39
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Old 6th February 2013, 09:56 AM   #40
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I bought mine from Blackburn electric Wires Blackburn Electric Wires . whatever the metric equivalent of 14Gauge is. If you tell them you are doing coils for speaker crossovers they will give you the right sort of enamel.

They have a minimum 2KG purchase I think. From memory I paid about $70 back in 2010 I think. I only used 1/2 of it but for the number of coils I made it was probably less than 1/2 the price of buying pre made Solen ones (speaker bug didn't have 14Ga in the sizes I wanted). Before I got brave and wound my own, I was going to buy higher dcr ones from speakerbug. Check out my blog if you want a bit of background on how I made them

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