Hybrid Horn almost full range

Status
This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.
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)

An externally hosted image should be here but it was not working when we last tested it.


An externally hosted image should be here but it was not working when we last tested it.


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:

An externally hosted image should be here but it was not working when we last tested it.



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

An externally hosted image should be here but it was not working when we last tested it.


An externally hosted image should be here but it was not working when we last tested it.


Update:
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:

An externally hosted image should be here but it was not working when we last tested it.


An externally hosted image should be here but it was not working when we last tested it.

Oops, forgot to cut the ports to length! They are the longer ones of the stack ^
An externally hosted image should be here but it was not working when we last tested it.

I'm uploading the spec sheet because I couldn't find it on the internet:
An externally hosted image should be here but it was not working when we last tested it.
 
Last edited:
can't see a picture...
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:

attachment.php


attachment.php


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:

attachment.php



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

attachment.php


attachment.php
 
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)
 
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
 
Nice work at $18 a piece, but I am looking to use a neo 12" woofer preferably a Faital Pro been using their products for the last 2 years on pro audio cabs the best for the money as I get real good pricing on them. I'll be standing by I love this site due to well amount of intelligent designers and users on here. Learned a lot over the years. Please keep us posted must move a fair amount of air like Decware's Pro 12" mid top? thanks!
 
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:
An externally hosted image should be here but it was not working when we last tested it.

An externally hosted image should be here but it was not working when we last tested it.

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:
An externally hosted image should be here but it was not working when we last tested it.

Because everyone likes to see the frequency responses:(only the 12")
An externally hosted image should be here but it was not working when we last tested it.

An externally hosted image should be here but it was not working when we last tested it.

Hi there a:posted pictures looks good (although I can not down load the attachments on this computer), wish I had the computer skills to draw like you. IMO the concept is similar to the ALTEC A7, mid bass horn coupled in front through a rectangular opening smaler than the driver Sd & shelf reflex loaded back wave. Obviously your design is smaller (A7 used a 15" driver, the front slot load was rectangular, the two horn verticlle sides were curved, the back load was carried below the driver to a larger box below the horn and the vent was a reflex opening in the front panel). A7 was a two way design with the HF crossed over at 800hz (A7-8) or 500hz (A7-500). The HF horn was located on top of the bass/mid cabinet, and generally exposed (not cabinet enclosed). Your sim indicates that it should work. Where are you locating the HF horn? The A7-800 I constructed worked for mid bass and HF, however, was shy on bass response. The term subwoofer was not being used in 1963!
...regards, Michael
 
Nice work at $18 a piece, but I am looking to use a neo 12" woofer preferably a Faital Pro been using their products for the last 2 years on pro audio cabs the best for the money as I get real good pricing on them. I'll be standing by I love this site due to well amount of intelligent designers and users on here. Learned a lot over the years. Please keep us posted must move a fair amount of air like Decware's Pro 12" mid top? thanks!
Faital Pro has some real nice drivers, but the price of a Faital Pro 12" is the cost to build four cabs with mcm drivers. I checked out the Decware Pro 12", it looks real nice, and it’s interesting how it has the slot to change the tuning. As for the movement of air, I’ll post more about it when the box is built. I got all but the trapezoids cutout. Hopefully I’ll upload a couple picture of the build today.

Agreed, diyAudio is a great site. This site (and links found on here) taught me just about everything I know about speakers, aside from hands on experience.

Michael, Speaking of hands on learning, AutoCAD is a really nice program to work with, I just learned last year how to use CAD, but my class in high school last year didn’t touch on 3D much. (I’m only 18 by the way) That part I taught myself, it’s not hard though you just draw in 2D then Press Pull it (for modeling speaker boxes). The driver in the cab was more complicate to model. I modeled it after the MCM 18” over the summer, and now I just scale it to 12, 15, 10, etc. The line of MCM drivers I use are almost a scale of each other so it made things much easier.
Where are you locating the HF horn?
The rectangle in the middle is the HF horn:
This is the approximate size of the horn, I might go slightly smaller:

An externally hosted image should be here but it was not working when we last tested it.
 
Last edited:
HF horns in front of a cone have been done by many manufacturers.

Trades diffraction problems for concentric dispersion patterns.
Also, to get the crossover "right" will probably require HF delay.

Some of the diffraction problems can be reduced by "streamlining" the driver to horn (styrofoam can be used) and running pipe insulation foam around the HF horn.
 
Sorry it got delayed, had a lot of school work. There's a chance I'll work on the box this weekend. The B-52 Compression horns came in though. They sound very clean, but I don't have the 12s yet. I'll upload the picture of the spec sheet of the HF drivers when I'm home because I couldnt find it online.
 
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!

An externally hosted image should be here but it was not working when we last tested it.
Qenstion is why make a horn to get 95dB?

I can design a bas-reflex 100dB down to 30Hz in halve the size of your horn, so what are you gaining here with that design?

For higher efficiency. 99dB wmtr -6dB 35HZ

Beyma 15lw30

And

18 sound 15MB606


attachment.php


attachment.php


attachment.php
 
Last edited:
Qenstion is why make a horn to get 95dB?

I can design a bas-reflex 100dB down to 30Hz in halve the size of your horn, so what are you gaining here with that design?

For higher efficiency. 99dB wmtr -6dB 35HZ

Beyma 15lw30

And

18 sound 15MB606

The horn is not for bass, it's a *mid*/top enclosure. The short horn in front is the right size to get the mid frequencies I wanted boosted. Then I decided to port the rear for added bass. The 50 Hz this enclosure stays flat to it just an extra plus, I was only going for 100-200 Hz.

I agree there are better enclosures, for bass. Almost any tapped horn will have a better low end then the MT-112.
 
Last edited:
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:

An externally hosted image should be here but it was not working when we last tested it.


An externally hosted image should be here but it was not working when we last tested it.

Oops, forgot to cut the ports to length! They are the longer ones of the stack ^
An externally hosted image should be here but it was not working when we last tested it.

I'm uploading the spec sheet because I couldn't find it on the internet:
An externally hosted image should be here but it was not working when we last tested it.
 
Last edited:
Status
This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.