Mid-bass horn (easy to build)

[3GGG]

Be nice to see that driver in a 70 or 80 Hz horn and go bit were to integrate with a tapped horn better

 

[djn]

I wish I needed a pair of horns, I would build the 135hz horns. Next time I am in Estacada I'd like to swing by and say HI.

 

[djk]

If the mids could go to 1Khz I might look at the 1" Faital Pro horn.

 

[fmena]

1 khz

With link below click on 135 hz mid bass horn side tab and then scroll down to the very very bottom of that page and you will get the 1 khz. I have not built this but just providing the information for your interest.

inlowsound.com

 

[swak]

Hi Carpenter,
I have just read this whole thread and about half of the info on your site and I want to thank you for sharing it with all of us!

I just wonder now if the the progression from the 80 to the 135 Hz mid-bass horn suggests that things can still improve if aiming at a higher cut-off freq and using a smaller driver. You mentioned that your spiral bass horns could perhaps go up to 200 Hz, have you thought about a 180-200 Hz mid-bass horn with a 5-6" driver? Perhaps the sensitivity or max slp would be too low for your system but it would be interesting for people with smaller 3 or 4 way systems (i.e., most of us 😀), with a a similar or even higher frequency crossover point above.

S.

 

[hum4god]

four B&C 8PE21 w/ 135hz horn ??

hi carpenter
you mention the use of 4 8pe21 with your 135hz horn making it more like a 100hz horn which looks really great.
did you get a chance to build those ?
i was wondering how the 4 drivers would enter the throat , would they be mounted from the side ?
m

 

[carpenter]

hi carpenter
you mention the use of 4 8pe21 with your 135hz horn making it more like a 100hz horn which looks really great.
did you get a chance to build those ?
i was wondering how the 4 drivers would enter the throat , would they be mounted from the side ?
m

Hi,

I haven't fabricated the 4x8" horn, yet, but will one of these days when I catch up with my other major projects (I'm building the mold for a Western Electric 15A--but it'll be circular, not rectangular). I'm also finishing up the DIY electronic crossover presented on my website.

The single driver 135 hz mid bass horn is strong, and with a combination of 4 drivers it will be stronger still. I would join four segments of four horns at the second segment of expansion and allow the third segment of expansion to form an extension from that point to the mouth. Surprising as it may seem, the new horn won't be much larger than the original 100 hz bi conical horn.

I'm of the mind that crossing my spiral bass horns at 100 hz is cleaner sounding--they put out too much all encompassing volume above 100 hz and it's more pleasant to listen to the shorter horns in that frequency range.

I've had several queries about the 4 by 8" horn, and I apologize for not having this horn completed sooner.

 

[carpenter]

For some reason DiyAudio didn't alert me of the posting that has taken place in this thread until today....

I've had a good time reading and catching up with all the thoughts and opinions. Nice to see that horns are alive and well! 🙂

 

[Scott L]

4x8's

For some reason DiyAudio didn't alert me of the posting that has taken place in this thread until today....

I've had a good time reading and catching up with all the thoughts and opinions. Nice to see that horns are alive and well! 🙂

DIY will only send one notice until you do a return visit. John, it seems like you are taking my suggestion, and then again doubling up on it. I like that !

Another VERY prominent horn builder has already used my double driver idea, as well.

The weather is turning nicer here, and soon I should be able to expand my existing mid-bass.

 

[hum4god]

Hi,

I haven't fabricated the 4x8" horn, yet, but will one of these days when I catch up with my other major projects (I'm building the mold for a Western Electric 15A--but it'll be circular, not rectangular). I'm also finishing up the DIY electronic crossover presented on my website.

The single driver 135 hz mid bass horn is strong, and with a combination of 4 drivers it will be stronger still. I would join four segments of four horns at the second segment of expansion and allow the third segment of expansion to form an extension from that point to the mouth. Surprising as it may seem, the new horn won't be much larger than the original 100 hz bi conical horn.

I'm of the mind that crossing my spiral bass horns at 100 hz is cleaner sounding--they put out too much all encompassing volume above 100 hz and it's more pleasant to listen to the shorter horns in that frequency range.

I've had several queries about the 4 by 8" horn, and I apologize for not having this horn completed sooner.

that sounds really exciting , i hope you get to it soon .
what will the total length w/ driver chamber be ?
do you know how wide the horn will be in the back , with the 4 horn sections ?
i imagine with the 4 drivers it needs to be at least 16" wide x 16" high in the back ?

m

 

[carpenter]

that sounds really exciting , i hope you get to it soon .
what will the total length w/ driver chamber be ?
do you know how wide the horn will be in the back , with the 4 horn sections ?
i imagine with the 4 drivers it needs to be at least 16" wide x 16" high in the back ?

m

It's going to be at least that size in back, maybe larger. Horn length will be about the same, mouth size is considerably smaller than if you stacked 4 single horns together.

I'm planning to draw this project soon.

As to the delay: I don't know if you've ever seen a Western Electric 15A, but they're huge and it's taking up a lot of my resources.

 

[Sadik]

Needed Help to Design

Hello Carpenter,

Just saw your website.. ur too Good. I Liked your work very much. Specially the Spiral Bass Horn Loved it Man. Now let me come to the Point, I was thinking about the Danley BC 415 Subs. May be u could help me out. Do you have any idea about internal layout or Drawing of those Subs.

I have seen layout from one of the Member on this site "Weltersys" Based on his layout it looks likes 4 Horns are Mirrored Horizontally & Vertically. I have made a Drawing referring the same. Some screenshots for reference.

Secondly i dont know how to use Hornresp, So can you help me out by stimulating my Drawing in that Software & checking its Results. I can send the Drawing to you in any format you like. My email id is sadik.bhatkar@yahoo.com

Regards,
Sadik Bhatkar

 

[hum4god]

polars

hi John
i was wondering if you have the polar plots for the one driver version of your 135hz horns ?
i would consider crossing at 700hz to an azura ah425 and was wondering if the azura ah425 and your 135hz horn matches in dispersion at around 700hz?


m

 

[jpak]

By the way, that sim was taken with the 100 hz mid bass horn.

Hi John, could we see the 285-2000 sim with your 80 hz horn? Thanks.

 

[hum4god]

It's going to be at least that size in back, maybe larger. Horn length will be about the same, mouth size is considerably smaller than if you stacked 4 single horns together.

I'm planning to draw this project soon.

As to the delay: I don't know if you've ever seen a Western Electric 15A, but they're huge and it's taking up a lot of my resources.

yeah, the we15A are an amazing project. no wonder you are preoccupied.
as i recall you make them in a round profile ? reminds me of your crescent 60hz horn which i always wanted to build but in a square profile not in my small living room though.

i just saw that you updated your web page with the new 85hz horn , which looks great .
can you tell me what the mouth opening for that horn will be ?
i am looking forward to see more details on how you merge the 4 horn sections into the last mouth flare .
i just discovered the length of 57" plus driver chamber which is a little bit of a turnoff , at least for my space .

so i would still be interested in the 105hz 4 driver horn if you are still motivated to provide details for that option ?? what will total length be ?
m

 

[vgeorge]

My 135Hz horns are slowly getting ready!

 

[Zwiller]

Just wanted to post to subscribe to this thread in anticipation of info relating to the 4X8 horn. John, thank you for sharing and your site. What a great source of info and inspiration! If I could be so bold to suggest adding some woodworking tips related to building horns on your site since you are a professional. Jigs, techniques, etc. I think you and your site would be a perfect fit.

 

[beancounter]

A quick question similar to hum4god's earlier inquiry regarding the single driver 135 hz horn - what is the real-world usable upper bandwidth?

Would love to try to cross over at 800 hz tractrix (likely 2nd order). Ok match, or potential dispersion mismatch?

 

[Ropes]

Hi John,

I was wanting to build your 80Hz midbass horn using a set of AE Speakers --- Superb Quality, Unforgettable Performance, Definitely. which I currently have in sealed enclosures. You mentioned the design should work with most 18" drivers or would I need to modify it for this driver??
I'm using this mid bass with a set of Synergy horns (Paul Spencer) covering above 350hz and a tapped horn sub below 80hz (Keystone Subwoofer - Art Welter), the system is mostly used outdoors so has no room gain.
Do you have any pictures/diagrams of the build process or cutting plan that would help in the build??

P.S happy to contribute some $$ for the drawing etc

Regards, Rowan

 

[Rewind]

I built a similar horn, crossed between 80-400Hz. JBL 2220H 15" worked fine, but the 2225H did not. So you may try different drivers. I don't know about 18" drivers. 15" seems large enough for midbass and lower mids.