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Horn Sub Input Please - Build In Progress!

73398 Views 260 Replies 20 Participants Last post by  iconrl
I am in the process of layout/design of my new theater room. I am going to be using PI 4 Speakers for LCR, and PI 1 Speakers for Surrounds. I designed a set of OD Horn Speakers to compliment the LCR and surround speakers as flanking subs to tame room modes. So the frequency range is 50-200hz

Since this is my 1st attempt at Hornresp and Sketchup, I am looking for input on my design and folding before proceeding further. So there will be 7 total of these flanking subs the front 3 will be under the PI 4's and the 4rears will be under the surrounds in a column configuration. The will be driven with 20 watts RMS.

I will be using a miniDSP 10x10hd, and the plan is to cross the flanking subs, with there respective mains, as well as matrix the LFE channel to theses subs as well for frequencies above 50hz, and then use the Low LFE subs for everything under 50-60hz.

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Thanks for the response. I actually changed drivers and re designed the Front LFE subs. Here is a picture of the 1 watt SPL response, and a picture of the folding.

I am still also designing a rear sub, which will be under the seating riser, and will cover down to 10hz.


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The response is around 15hz @ 102 db 1w/1m. The goal was good sensitivity, and good extension, I will be building a pair of the subs, and the will be placed between my main speakers behind my screen. They will blend in with a larger horn sub that will be built into the seating riser, which will be tuned to 10-11hz.

The overall size of the enclosure is 60cmX73cmX182cm, the drivers are dual 10" subs. It may look like alot of space, but actually I would only gain around 20cm of length if I redisgned and redrew it, which imho is not worth the effort, it fits the space I need it to, and has the response and extension that I was expecting.
That is corner loaded sensitivity though. Hope it responds as well when its built.
I have redone my Flanking Subs, using a Delta 10A driver, found it smoother, and fit into a slightly smaller package. Should work good I think!


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Yes, flanking subs will be used for 50-200hz+- depending on room modes, ULF tappered horns for <50hz. Trying a distributed sub setup to help room modes and elimanate or reduce use of PEQ filters.
Not so much looking for peak SPL, but to do a distributed sub setup to even out room modes and smooth out the frequency response without using PEQ filters, and to use low powered amps, like 20-30 watts a channel for reference level. The plan is to run into a miniDSP 10x10 which has crossover, matrix, and PEQ filters.

I will be matrixing the LFE signal and LCR channels with their respective flanking subs which will smooth out there midbass response. After the lower crossover point they will be LFE subs only, they will then cross with the ULF LFE subs which will be located 2 at the front and under the rear seating riser.
Advise taken, I am using 1/2 space sim in hornresp, so I assumed that would be close to in room...?
Dedicated theater room, and for music but I would say 80% movies. It is in a basement, framed inside of concrete walls, with Z channel and 5/8 drywall, also has concrete ceiling, so pretty solid.

I am in Ontario, Canada, and use imperial most of the time, but hornresp outputs metric so just going with the flow!
Thanks for the input. I can redesign them for sure. I have not heard a tapperd horn before, but I do prefer the sound of a sealed sub over a vented sub anyday.

I will resim the ULF subs.
this design not applicable anymore
No its a dayton classic 4 ohm. I will check out your build.
Revised ULF Sub, using 1 - 12" Driver.


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Box is 570L. Lab 12 is double the cost, trying to take the cheap road, plus I will be building four of these boxes.
Not yet but I think it should hit reference level no problem down to 15hz, my room volume is 2100 cu/ft.

Here is the updated flanking subs, box volume is 100L

Cheap drivers again!


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1st Draft of Seating Riser Sub, this will be the Selenium 12" LFE x 4.

I also did the approx. 4 driver response, which is 1w/1m.


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Okay, will redo the midbass.

The box only seems large, because of the thickness of the riser, I maybe doing something wrong, but my model was for 140L per driver, so with 2 drivers I doubled to 280L. I could make it smaller, just cause more ripple in the response, so I increased to smooth out.

The mouth won't be a single, they will have the same size as modeled just exit at the same point, sorry for the confusion with the drawing.

The selenium is a 12PW5-SLF 12"

Just thought, in the case of the woofer chamber, I did not think that dimensions mattered just the volume of the chamber, as the driver does not no that only the volume of air behind it?

Also you said you where near Ottawa, I actually live in Stayner, which is just south of Wasaga Beach.
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