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Multi-Way Conventional loudspeakers with crossovers

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Old 1st June 2007, 09:22 AM   #1
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Join Date: Jun 2007
Default Advice For First Time Speaker build

Hey guys, my names David. Im 17 and just recently joined HT Guide and have been interested in Hi-Fi for many years. It wasnt until recently until I heard a pair(well actually 4) B&O Beolab 5's. That was beyond amazing.

Im interested in building a set of front floor standing speakers (full range) and need a bit of help. I know a fair bit, but my knowledge is still limited. How many drivers should I be looking at (3 or use 4 for low and high pass) Type of Crossover(was thinking of linkwitz-riley, but then again I know little about crossovers)
Finally, brand of drivers... I want a good quality set without spending huge amounts.Also where to get them(I live in australia).
Price range: have no idea what drivers cost(quality ones that is) People said drivers like usher, but these are asian drivers, have no idea of how good they are. I was thinking something like Polk etc.

What do you think?

Thanks guys..
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Old 1st June 2007, 11:40 AM   #2
sreten is offline sreten  United Kingdom
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Hi,

Seas drivers are available down under so I suggest taking a look
at this, you would need to find a source for a similar horn lens :

http://www.zaphaudio.com/Waveguidetmm.html

/sreten.
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Old 1st June 2007, 01:20 PM   #3
Zarathu is offline Zarathu  United States
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Default build something already designed!

You might try the PE website of projects:

http://www.partsexpress.com/projectshowcase/index.cfm

This floor standing model is terrific and the designer is a very qualified Electrical Engineer:

http://www.partsexpress.com/projects...trix/index.cfm

Zarathu
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Old 1st June 2007, 02:13 PM   #4
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thanks sreten, I had actually decided on going Seas but didnt update my post. I was pushed away from them in my other post(different forum) and told to go for Dayton RS 3-way.
How many drivers should I go for. Normal 3 way, or have 1 tweeter, 2 mid and 2 bass? Also, I thought it was a bit strange with the seas excel, their tweeter is 2000-20000hz. Seems like to much of a stretch, wouldnt a mid from the prestige range be better to add to the tweeter?
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Old 1st June 2007, 02:39 PM   #5
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Location: Brisbane, QLD
I think B&O use digital room correction in their speakers, so you'll probably have a very hard time equalling that.

If you're just starting off, I definitely wouldn't use any more than 3 different driver sizes:

2-ways are a compromise: they're not really "full-range" unless you put a lot of extra work into building TQWP boxes, vented boxes, or you add a sub.

3-ways seem to have more potential, but you have to design a more complex crossover and more things can go wrong.

As for a 4-way design, I don't see any technical reason why it should be necessary.
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Old 1st June 2007, 02:53 PM   #6
Zarathu is offline Zarathu  United States
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Kirbs,

Whatever you use, you must remember that the passive crossovers are not interchangable. If you change the speaker in a design that already has a schematic for the crossover, then you CANNOT USE THAT CROSSOVER.

Zarathu
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Old 1st June 2007, 03:06 PM   #7
sreten is offline sreten  United Kingdom
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Join Date: Nov 2003
Location: Brighton UK
http://www.rjbaudio.com/projects.html
http://www.zaphaudio.com/
http://www.troelsgravesen.dk/Diy_Lou...r_Projects.htm
http://www.humblehomemadehifi.com/

Hi,

You should be able to find something suitable from the above.

possibly :

Click the image to open in full size.

http://www.rjbaudio.com/AlpheusMkII/alpheusmkii.html

/sreten.
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Old 1st June 2007, 07:53 PM   #8
Jay_WJ is offline Jay_WJ  United States
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Location: Indiana
I second sreten's suggestion. Alpheus Mk II uses relatively inexpensive yet excellent drivers. Looks very appropriate for a first-time DIYer who wants to do a 3-Way.
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Old 1st June 2007, 11:57 PM   #9
thadman is offline thadman  United States
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The Peerless Exclusive 4" is no longer available and are very rare, so unless you talk somebody out of them, I doubt you'll be able to construct the Alpheus MkII
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Old 2nd June 2007, 12:21 AM   #10
ruerose is offline ruerose  Canada
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Join Date: Aug 2005
Solen.ca still lists it in the catalogue. They might have them still available.
But at $70 retail CDN each, this system is getting out of budget for me.

http://www.solen.ca/pee.htm
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