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Multi-Way Conventional loudspeakers with crossovers

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Old 22nd March 2013, 06:52 AM   #1
abcdmku is offline abcdmku  United States
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Default Hybrid Horn almost full range

I've been working on a 12" Horn to fill the mid/top frequencies. I hate having the back of the cone go to waste so I ported the enclosure and got bass down to 50Hz!

Here are a couple quick renders of my "MT-112" (the HF horn isn't rendered, it would be in the middle)

Click the image to open in full size.

Click the image to open in full size.

For the front to make this full range I'm thinking of putting a compression driver. I'd crossover around 2000Hz. Would the driver being there disrupt the sound of the 12"?

This is the approximate size of the horn, I might go slightly smaller:

Click the image to open in full size.


Because everyone likes to see the frequency responses:
(only the 12")

Click the image to open in full size.

Click the image to open in full size.

Update:
Quote:
Originally Posted by abcdmku View Post
Finally got started on the build of the MT-112, but still yet to order the 12's and the horns for the Compression drivers...

Here's a couple pictures:

Click the image to open in full size.

Click the image to open in full size.
Oops, forgot to cut the ports to length! They are the longer ones of the stack ^
Click the image to open in full size.
I'm uploading the spec sheet because I couldn't find it on the internet:
Click the image to open in full size.

Last edited by abcdmku; 7th April 2013 at 06:54 PM.
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Old 22nd March 2013, 08:31 AM   #2
grec13 is offline grec13  United States
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can't see a picture...
Quote:
Originally Posted by abcdmku View Post
I've been working on a 12" Horn to fill the mid frequencies. I hate having the back of the cone go to waste so I ported the enclosure and got bass down to 50Hz!

Here are a couple quick renders:

Click the image to open in full size.

Click the image to open in full size.

For the front to make this full range I'm thinking of putting a compression driver. I'd crossover around 2000Hz. Would the driver being there disrupt the sound of the 12"?

This is the approximate size of the horn, I might go slightly smaller:

Click the image to open in full size.


Because everyone likes to see the frequency responses:
(only the 12")

Click the image to open in full size.

Click the image to open in full size.
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Old 22nd March 2013, 05:11 PM   #3
abcdmku is offline abcdmku  United States
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Quote:
Originally Posted by grec13 View Post
can't see a picture...
I changed the links. Can you see them now?
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Old 22nd March 2013, 07:06 PM   #4
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A diffraction/reflection box!
Just what we need!
Quote:
Because everyone likes to see the frequency responses
I like to watch at other kind of curves
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Old 22nd March 2013, 07:56 PM   #5
grec13 is offline grec13  United States
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yes, thank you.
Quote:
Originally Posted by abcdmku View Post
I changed the links. Can you see them now?
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Old 23rd March 2013, 05:26 AM   #6
abcdmku is offline abcdmku  United States
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Quote:
Originally Posted by picowallspeaker View Post
A diffraction/reflection box!
Just what we need!

I like to watch at other kind of curves
"A diffraction/reflection box"? not sure I understand the reflection part.

and as for the curves, for us Italians, that goes with out saying :P (ironically I just posted in an argentine pride post too, being that I'm both Italian and argentine)
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Old 23rd March 2013, 06:14 AM   #7
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Hi,
well, every boundary is reflective!
IMO if you want a better midrange
go with a real one, i.e. a 5 or 6"
I'm using one! ( see Systems& pictures, the last ones )
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Old 23rd March 2013, 04:05 PM   #8
abcdmku is offline abcdmku  United States
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I was originally going to use two 8" speakers. The 12" response has a curve flat up to ~2000 Hz and the compression drive I have is flat down to ~1000 Hz. The only advantage a "real midrange" has, is slightly cleaner highs, but it has less bass. The good thing about using the 12" is that it makes these cabinets "full range". I could take these somewhere and use them alone if I had to. (obviously it would be better to use the subs with it too, for my definition of full range is 20Hz-20kHz)
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Old 23rd March 2013, 09:12 PM   #9
djlivex is offline djlivex  United States
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Do you have the plans available for us or is it still a secret? Nice cab to go down 50Hz solid, what driver are you using and is it available here in the US? Thanks!
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Old 24th March 2013, 05:57 AM   #10
abcdmku is offline abcdmku  United States
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Quote:
Originally Posted by djlivex View Post
Do you have the plans available for us or is it still a secret? Nice cab to go down 50Hz solid, what driver are you using and is it available here in the US? Thanks!
I'm in the process of building the cab now, I'm going to be on campus from Monday-Wednesday hopefully I can get it done by next weekend. I still need to order the speakers though.
Believe it or not, that response curve is using an MCM 12" :O
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