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Old 10th September 2013, 07:44 AM   #1
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Default 3-way open baffle project

Hello!

I started to buy speakers for OB project that looks like this:

Panel 125/83 cm
Bass: 2x Eminence Alpha 15A
Medium: Monacor SPX-200WP
Tweeter: Monacor DT-300 + WG-300

I really need help with the crossover from them. Waiting and any other suggestions as it is my first project of this kind.

Thank you!
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Old 10th September 2013, 09:02 AM   #2
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miniDSP 2x8?
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Old 10th September 2013, 09:18 AM   #3
Juhazi is offline Juhazi  Finland
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+++ or 4x10Hd

It is a very very challenging task for passive xo and you need to do many many tweaks during setup! You will 3-4 (sub?) amplifier channels too and lots of nominal power because of poor efficiency - expect 12-18dB loss because of dipole correction.
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Old 10th September 2013, 09:22 AM   #4
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Quote:
Originally Posted by snake69fast View Post
........ first project of this kind.........
To do this perfectly isn't going to be easy. You will have to do a lot of reading too. You might need to understand all the issues at hand and then implement them and come back when you come across problems. That makes it easier for others to help you.

Look up Tech
There are other threads too with results of various OB builds. Do a search on this web site. All this material will keep you busy for a while I guess !
All the best.
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Old 10th September 2013, 10:21 AM   #5
evanc is offline evanc  United States
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My set up is similar to what your doing. I use passive crossover for the mid to tweeter, but definitely needed mini dsp for bass...plus a lot of wattage for the bass drivers.
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Old 27th March 2014, 09:50 PM   #6
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Hello! Here are some results "with a little help from my friends" - Jerome69, Pano and Rudolf. Thank you again!
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Old 27th March 2014, 09:57 PM   #7
puppet is offline puppet  United States
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Very nice. With those three fellas helping you along they must sound as good as they look.
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Old 27th March 2014, 11:03 PM   #8
adason is offline adason  United States
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is there any reason why tweeter and mid are so far apart? usually these should be as close as possible
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Old 27th March 2014, 11:15 PM   #9
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And it's screaming
dd-dd-dd-diffraction !

Edit: Oh man ! there's also the "8 shape" lobing helping not to make it happen so consistently
If the graphics of a dipole radiation might superimpose on the picture..
Is there a rear tweeter ?

Last edited by picowallspeaker; 27th March 2014 at 11:18 PM.
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Old 28th March 2014, 10:47 AM   #10
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Quote:
Originally Posted by picowallspeaker View Post
And it's screaming
dd-dd-dd-diffraction !

Edit: Oh man ! there's also the "8 shape" lobing helping not to make it happen so consistently
If the graphics of a dipole radiation might superimpose on the picture..
Is there a rear tweeter ?
Not yet!

In fact affter finished my third attempt to build this OB (the one in the pictures) everybody (family, friends) seems to be really impressed. Now after 3 month of listening I know what I want to improve: the mid and the tweeter. When I say that I want to improve them it is not because they sound bad. It is because I want more. So I am open to any advise/help.

Thank you all!
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