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post #1 of 140 Old 09-11-2006, 06:40 AM - Thread Starter
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Thanks everyone here on helping me earlier on in almost building dual sonotub subs. I know it would have rocked but Im going with an IB design.

I have been on the "IB Cult" forum and Thomas there is incredible for helping people but I still like this forum better because of the "traffic" it gets and Im a paying member .

First project, Im going to be installing a IB into my ceiling in my family room....12 foot ceiling, the Sub will be 2 feet off the left wall placed center over the TV (and center channel)

I have not decided on 4 15" TC2000s ( I own 2 already) or 4 Mach5 18" (I own those too).

Here are some pics to start....


House plans......




Design choices from other IB DIY projects......

Cube....4 woofers.




Rectangle...4 woofers.



Pictures of the family room will come later, I need to resize them first.

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post #2 of 140 Old 09-11-2006, 06:44 AM - Thread Starter
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Im building the box tomorrow so I need to decide which is better to build.

The Cube?? or the Rectangle?

The room (as per the house plan) is around 21x36x12 with an opening to the dining room and enterance. Its big but I dont need a monster system.

I will have a HT room for the best sound.

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post #3 of 140 Old 09-11-2006, 06:51 AM - Thread Starter
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This is the cover for it....

aluminum 36x24 wall vent, that will be mounted in the ceiling.


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post #4 of 140 Old 09-11-2006, 07:08 AM
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I don't know that much about it, but I would think that 1. The cube would be better (since you're not overlapping the rear wave...though I don't know how much that really matters) and 2. That you'd be better off with a different cover...something with some sort of fabric wrapped around a frame and installed over the gap. I'm not sure if the metal grate would affect the sound...but it might start making some of its own (rattling, etc.) when you turn up the juice.

Hopefully people who have done IBs before can chime in, though.
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post #5 of 140 Old 09-11-2006, 07:14 AM - Thread Starter
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WAF is very important and tHe aluminum vent seem to please her the most. Yes, I must make sure it wont rattle.

I could not find a big enough grill. I would love to have a BIG in-ceiling/in-wall speaker grill but no luck.

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post #6 of 140 Old 09-11-2006, 07:17 AM - Thread Starter
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Quote:


The cube would be better (since you're not overlapping the rear wave...though I don't know how much that really matters)

I dont think rear waves matter at all in IB...People build arrays 6 Woofers long and place them vertical in walls


The opening needs to be a certain size and the rectangle gives me that while the cube doesnt. How much difference though is something I dont understand at all because I dont understand "bandpass" stuff at all. The cube on the other hand gives the best WAF so if the trade off isnt much then I would build the cube (its more compacted and easier).

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post #7 of 140 Old 09-11-2006, 07:48 AM
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I thought I had read that somewhere...but you're probably right about the rear waves...I just wanted someone to chime in on it so you didn't feel like you were talking to yourself

As for speaker grille...that should be easy to make. Simple wooden frame with some grille material wrapped and attached. That should be the easiest part of the project, I would think.

http://www.partsexpress.com/pe/showd...number=260-334

there's some white grille material.
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post #8 of 140 Old 09-11-2006, 07:49 AM
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Go with a rectangle that has the mouth outlet area at least equal to the combined Sd of the drivers...that way there will be no compromises as to the manifold's sound quality.

I don't have time to calculate that right now as I need to get my a** out of the house and to a job, but I don't think the cube quite gets you there.
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post #9 of 140 Old 09-11-2006, 08:04 AM - Thread Starter
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Aaron thanks!

No the cube doesnt get me there but it does have a better WAF

I just dont know how much of a difference there is.....Been researching a third mounting option now!! I can never make up my mind..Im worse then my wife on this damn DIY project. This one seems to be the easiest build yet....no box

Like this one but instead of 2 it will be four woofers across.




This grill over each with cloth on it.


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post #10 of 140 Old 09-20-2006, 08:41 AM - Thread Starter
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Here is the location where Im going to install the IB array....


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post #11 of 140 Old 09-20-2006, 08:44 AM - Thread Starter
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Here is the 78x22 1 1/2" thick MDF board, Its a total of 4 48x24 MDF boards...cut and glued to specs.



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post #12 of 140 Old 09-20-2006, 08:45 AM - Thread Starter
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Here is the starting of the holes and my home made circle Jig.....


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post #13 of 140 Old 09-20-2006, 08:50 AM - Thread Starter
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Finished Array ready to be installed.

I just moved the IB array to the house this morning, will find out if it fits tonight. I mounted 2x4s to each side of it for more strength and so I can then screw the 2x4s into my ceiling trusses spreading the load of it accross all 80". My builder and I think we will also build some other supports into it when its in the attic.


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post #14 of 140 Old 09-20-2006, 08:51 AM - Thread Starter
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Here is the family room ceiling where the 4 speaker array will be blasting through before I cut it all up


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post #15 of 140 Old 09-20-2006, 12:16 PM
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The ceiling would look much better with those subs in there...

Keep the pictures coming...

Best,
Mark

You guys are crazy....
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post #16 of 140 Old 09-20-2006, 01:29 PM
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Looks AWESOME. Same idea I am planning on for my HT with the Mach 5 drivers.

Mark, thanks again for the incredible value you got on the 18" drivers.

-Chris B.



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post #17 of 140 Old 09-20-2006, 01:55 PM
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I gotta tip my hat to you guys for being able to GET AWAY with something like this. No matter what was said, I just couldn't convince the wife this was the way to go.

*BUT*

I did talk her into a line array using 12 MAW-12's for the livingroom...

Best,
Mark

You guys are crazy....
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post #18 of 140 Old 09-20-2006, 01:57 PM
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Quote:
Originally Posted by mrogowski View Post

I gotta tip my hat to you guys for being able to GET AWAY with something like this. No matter what was said, I just couldn't convince the wife this was the way to go.

*BUT*

I did talk her into a line array using 12 MAW-12's for the livingroom...

Best,
Mark

The conversation went something like this: "The boys get the theater and garage, you can get all the other rooms in the house."

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post #19 of 140 Old 09-20-2006, 03:10 PM
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Quote:
Originally Posted by crackyflipside View Post

The conversation went something like this: "The boys get the theater and garage, you can get all the other rooms in the house."

Penngray, great pics.

My deal was to redo the kitchen with granite countertops and tile floors, and update the bathrooms. The wife had little to say when the HT started taking over the family room.

A man meets a genie. The genie tells him he can ask for whatever he wants, but his mother-in-law gets double of what he gets. The man says give me a million dollars and beat me till I'm half dead.
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post #20 of 140 Old 09-20-2006, 05:14 PM
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Ha! You guys obviously aren't married to the 'Big M'.

You guys are crazy....
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post #21 of 140 Old 09-20-2006, 05:28 PM - Thread Starter
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The WAF thing was a big issue actually but I convinced her so far that it would look just like a big vent If it looks like crap to her, its gone but I get a chance to prove it works. The best thing going for me right now is that the house is not finished yet so I have options.


The real HT room will be designed in December.

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post #22 of 140 Old 09-20-2006, 05:31 PM - Thread Starter
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Quote:


Same idea I am planning on for my HT with the Mach 5 drivers.

Mark, thanks again for the incredible value you got on the 18" drivers.

I just posted in your thread, I am using the MJ18s unless they suck then its on to Q18s I had them shipped to my canadian address and my parents are coming to visit in two weeks, good thing they have a minivan.

My HT room will have 2 or 4 15" TC2000s

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post #23 of 140 Old 09-20-2006, 06:15 PM
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I just posted in your thread, I am using the MJ18s unless they suck then its on to Q18s I had them shipped to my canadian address and my parents are coming to visit in two weeks, good thing they have a minivan.

My HT room will have 2 or 4 15" TC2000s

4x 15" TC-2000s......mmmmmmmm.
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post #24 of 140 Old 09-20-2006, 06:48 PM - Thread Starter
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4 only if I go with an IB solution for the HT room. I love the look of just two but four in an array along the bottom of my 105" screen would be pretty sweeeeeet

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post #25 of 140 Old 09-21-2006, 11:14 AM
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Where did you find those cool looking grill covers at?

-Chris B.



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post #26 of 140 Old 09-21-2006, 12:00 PM - Thread Starter
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Which ones? Which post?

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post #27 of 140 Old 09-21-2006, 04:44 PM
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This one:


-Chris B.



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post #28 of 140 Old 09-21-2006, 05:45 PM - Thread Starter
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raxxess speaker grill 18 inch, you can just google it.

That was an option for me but now Im going with a custom wood frame built into the ceiling and speaker cloth.

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post #29 of 140 Old 09-21-2006, 06:26 PM - Thread Starter
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No pictures and no picnic today.......

moving an 90+ lbs or what ever 4 MDF 3/4" 48x24 boards weight in an attic is a pain the ass. Heck getting it up into my attic was hard enough (needed help there) but since a person can stand only on the 2x4 trusses in the attic its a one man job once in the attic. Small people need not apply here

I will have to do more tomorrow really early, I didnt get it in the place I want so I can cut the ceiling holes, the heat in the attic during the day in Florida is pretty incredible.

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post #30 of 140 Old 09-22-2006, 04:22 AM
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Quote:
Originally Posted by penngray View Post

I just posted in your thread, I am using the MJ18s unless they suck then its on to Q18s I had them shipped to my canadian address and my parents are coming to visit in two weeks, good thing they have a minivan.

My HT room will have 2 or 4 15" TC2000s


Well, they aren't TC's but they aren't sucky either..

You guys are crazy....
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