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Multi-Way Conventional loudspeakers with crossovers

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Old 24th April 2007, 03:30 AM   #11
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At the risk of being simplistic, there are three sets of calculations you are going to have to deal with:

1.) picking a woofer and tweeter that complement each other properly and fit your goals in terms of size, price, performance, visual appearance, etc. (Don't even think about a three way until you've built a two way.)

2. Deciding on the box size, baffle dimensions, port size, and stuffing to match it to the woofer for good bass response

3.) Getting the crossover right for a smooth frequency and phase transition between woofer and tweeter.

If you think the second is hard, wait until you get to the third one! It is hugely more difficult & for most people it is impossible if one has not taken the time to learn the underlying theory and assemble the necessary test equipment to measure the frequency response at least.

I strongly encourage you to read the vance dickason book recommended by the person who posted earlier.

and/or read the articles here:

http://speakerbuilder.net/web_files/...xo/xoconst.htm

http://speakerbuilder.net/web_files/...xpointmain.htm

or try one of the introductory designs posted at the same site, such as this one:

http://speakerbuilder.net/web_files/...ts/DBP/dbp.htm

or one of the many excellent designs posted here. There are a very wide range of designs available at a wide range of prices.

If you don't want to do a kit, (and I can understand that decision) Then start with a well-regarded reference design. The reference design would include (1) a specific set of drivers (2) specific dimensions for the cabinet and layout for the front and (3) the schematic for the crossover. Then, build it, but go ahead and experiment as you go: try the box stuffed or unstuffed. Close the port and compare how that sounds vs. with the port open. Try different port lengths. Change the values of the crossover (within reasonable limits so you don't blow out the tweeter) and note the difference it makes. This will give you the fun of experimenting and also the fun of having something that sounds good at the end.

good luck, and enjoy!
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Old 24th April 2007, 03:33 AM   #12
larksp is offline larksp  United Kingdom
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yes i do want to build 2 book shelf speakers.... and the ones you suggest they will probably produce better sound than i will end up with.

i am just picky on looks i like something a bit different and my own
silly but thats me hehe if the speakers are to hard to use then i will try and find others i like
you word is far more than mine if there no good

and the cross over i dont know where to begin so this company
is wilmslow-audio

they have there own kits and design boxes and so on just i want to at least try and do something my self to be proud with and learn to get better.

they will design the crossover to the driver units unless some one else is willing to make them.
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Old 24th April 2007, 03:46 AM   #13
larksp is offline larksp  United Kingdom
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Quote:
Originally posted by tinitus

http://www.humblehomemadehifi.com/Cup-a-Soup.html

[/B]
dont like the drivers hehe but the box would be far past my skill
over all looks nice though


http://www.humblehomemadehifi.com/DD8-MkII.html
they look nice good finish but i would like front port on them
i have emailed the guy about them

dunno about the drivers but sill looks nice
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Old 24th April 2007, 03:50 AM   #14
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If you want to learn a bit about the pros and cons of different drivers, give this a look:

http://ldsg.snippets.org/idx.php

The enclosure is highly optimised to the characteristics of the drivers. You can't just swap drivers within a given enclosure and expect to have anything that sounds decent.
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Old 24th April 2007, 03:50 AM   #15
larksp is offline larksp  United Kingdom
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David94114 yes you are very right. i dont even want to try 3way not yet

and yes i would be glad to use a set of drivers that match just none that i have seen whats not much..

and i will read up a bit on them as well see what goes in

thanks you both for replying it is good.

i think the cross over is way off but the box i could do and hopefully that site and talking to them to get a ok one

i will try and learn about them im not sure the hole putting it together i can use programs to like design one but then get the strange pictures and looks nothing like a board with stuff on

and ahhh its 5am lol i been on these forums today like since 11 am maybe bed time it is
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Old 24th April 2007, 04:07 AM   #16
ttan98 is offline ttan98  Australia
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Location: Melb
Tinitus is right don't build speakers from scratch you will not be happy with the sound quality, unless you are willing to spend lots of time tweaking/find out what is wrong with it and also to help you diagnose the problem, use s/w(free or commercial) to find out whether the x-over is right and also spend time learning on how the speakers work.

Time is the key, building an off the plan speaker is the way to go if you don't have the time and patient.
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Old 24th April 2007, 04:35 AM   #17
tinitus is offline tinitus  Europe
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Anyone know if these are good - on first hand they appear to be OK, but it kind of looks like a "one size fits all" - if you are into metal cone, I am not

I think THOR and ODIN looks nice though

maybe not as sophisticated xo as the ones by Troels and Zaph
You must be aware that those guys do a lot of fine tuning, which you cannot get or buy cheap elsewhere

http://www.seas.no/kits%20main%20page.htm
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Old 24th April 2007, 04:39 AM   #18
ttan98 is offline ttan98  Australia
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I thought the Thor kit is well proven speaker!!

Others I am not to sure...
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Old 24th April 2007, 04:42 AM   #19
tinitus is offline tinitus  Europe
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Ah, yes, I thought I have seen it mentioned from time to time - its a TL

XO appear to be the same on Thor and Odin
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Old 24th April 2007, 10:06 AM   #20
larksp is offline larksp  United Kingdom
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the tyrm
looks ok shape and all is what i like
but is 8" woofer i think it might be a bit big

6"
or about 14cm - 16
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