3-way open baffle project

[snake69fast]

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!

 

[Studio Au]

miniDSP 2x8?

 

[Juhazi]

+++ 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.

 

[ashok]

........ 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.

 

[evanc]

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.

 

[snake69fast]

Hello! Here are some results "with a little help from my friends" - Jerome69, Pano and Rudolf. Thank you again!

 

[puppet]

Very nice. With those three fellas helping you along they must sound as good as they look.

 

[adason]

is there any reason why tweeter and mid are so far apart? usually these should be as close as possible

 

[picowallspeaker]

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 ?

 

[snake69fast]

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!

 

[snake69fast]

After some very successful listening session one close friend ask me to build a pair but a lighter one. I used Monacor SP-205/8. A lot cheaper and with a very good sound for the money. But... only close to the big ones.

 

[snake69fast]

is there any reason why tweeter and mid are so far apart? usually these should be as close as possible

The 1.0 and the 2.0 attempt of this OB was with the mid up near the tweeter. I was not satisfied with the sound of the mid and moving the mid way down improved a lot the sound. I didn't changed the tweeter position after that but there is room for improvement in the 4.0 version.
I will try three different drivers in the next month and I will post the results.

 

[picowallspeaker]

Eh ? What is the photo above ?!
Don't care to explain, please
( I was joking )
(say Excuse Me to your close friend )
I was thinking obviously to align 'em vertically.
Now it...sounds...like a three way D'appolito

 

[OllBoll]

If you don't get the MiniDSP 2x8 or similar you could get the NanoAVR + some AVR, then you get 8 channels with neat cabling and you can tinker back and forth as much as you want. Much easier than fiddling with passive XOs.

 

[sreten]

Hi,

The bass driver offsets are way too much, especially the
latter case. Centred 62% across the baffle maximum.

The latter design most of the baffle isn't doing much at all.

rgds, sreten.

 

[jamesecox]

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!

dbx 234, if you have enough amps