Oh Yeah!

[joetama 5,000+ posts]

I would go with the 2 per side horizontally with the manifold personally, because otherwise you are going to be hacking up a lot of wall. The wall mount though would be more in your face, but either way you don't get much ground coupling so I would go manifold.

 

[baseballer1100 5,000+ posts]

Thats going to be sick!!!

 

[pd298 10+ year member]

No kidding. 8 15's in a house. Ive never heard of such a thing.

 

[ssj2xxgotenxx 10+ year member]

Isn't that a bit excessive?! Overpowering?! Can the rest of your highs/lows keep up with all of that? Then agian, I guess it's very nessesary =)

 

[IamDeMan 5,000+ posts]

No kidding. 8 15's in a house. Ive never heard of such a thing.

Very common in the IB community of HT setups actually. Some use 8 avalanches. In an IB install output isn't all that great, because your driver will reach it's mechanical limits way before it reaches it's thermal limit. What you do get is really low extension though. So to make up for low output you just double or quadruple the drivers //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

Isn't that a bit excessive?! Overpowering?! Can the rest of your highs/lows keep up with all of that? Then agian, I guess it's very nessesary =)

The excessiveness is for dynamic transients of info below 20 hz in movies //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif I want to feel the movie proper. I will have 2 towers that contain 16 4" NSBs and 12 tweeters each in a line array, so when I do listen to music they should be able to keep up nicely with mids and highs.

 

[IamDeMan 5,000+ posts]

I would go with the 2 per side horizontally with the manifold personally, because otherwise you are going to be hacking up a lot of wall. The wall mount though would be more in your face, but either way you don't get much ground coupling so I would go manifold.

Yea, you have a point on the hacking. Plus it will be more wood and materials.

 

[joetama 5,000+ posts]

Running all the wire inside the walls would be a bit of a *****, while if you do the IB setup you can put the amp up top and just run a small signal cable up there, plus there is much less signal loss then.

Plus mounting subs in sheet rock (which i'm assuming your wall is made out of) will crush the sheet rock after about 30 seconds. So, you would have to do some serious wall upgrades.

 

[IamDeMan 5,000+ posts]

Running all the wire inside the walls would be a bit of a *****, while if you do the IB setup you can put the amp up top and just run a small signal cable up there, plus there is much less signal loss then.
Plus mounting subs in sheet rock (which i'm assuming your wall is made out of) will crush the sheet rock after about 30 seconds. So, you would have to do some serious wall upgrades.

Ya, I wouldn't mount any speaker directly to sheetrock, especially 8x 15s. It will be 3/4"MDF that will get bolted into the joists. The 2 stage manifold design would definitely be the most convenient construction-wise. Which was my initial thought from the start, so I guess I'll stick with it. The amp however will be mounted behind the entertainment center at bottom of wall and I was going to run the speaker wire up. This way I can tweak the amp if I have to as far as it's para-eq, crossover settings and gain.

 

[joetama 5,000+ posts]

That'll do, sound like you got it all planned out. How many feet will it be from the amp to the speakers and how many watts are you going to run. You might have said this but what amps are you going run?

 

[IamDeMan 5,000+ posts]

That'll do, sound like you got it all planned out. How many feet will it be from the amp to the speakers and how many watts are you going to run. You might have said this but what amps are you going run?

It is a Dayton 1000 watt plate amp that I am mounting onto the wall behind AV setup. The ceilings are nearly 10' high, so it may be a good 12' from amp to speaker(s). I probably will set the amp to put out around 600 watts though, because at that much power they will start to bottom at 16hz. There is a rumble filter built into the amp so anything lower than 16 I shouldn't have to worry about. If Winisd is fairly accurate on it's plot for this one I should get 115db @ 16hz with 600 watts as well //content.invisioncic.com/y282845/emoticons/crazy.gif.c13912c32de98515d3142759a824dae7.gif

 

[thylantyr 10+ year member]

You should do a test box to check performance before committing 100%.

I prefer a two part bass subsystem. One bass system would be a vertical line

array, maybe four-five 15's per tower, two towers one for each channel.

Configure this system as a ported box design for more chest pounding bass,

maybe design it to interchange port tuning, ie 30hz, 35hz, 40hz, 50hz.

The second system would be the ultra uber monster low frequency setup,

whatever you like that works.

In other words, you may do your attic IB install with 8 15" woofers but

there is nothing stopping you from building another bass system to perform

a different job, the sum of both systems is more uber than a single system of either.

I'm planning a vertical array of 15's, tuned to 32-35hz.. Later I will figure out

the 15hz uber solution, if I can make it fit in the small house - hah.

 

[joetama 5,000+ posts]

The only problem with doing 2 different bass systems is you are going to have serious frequency overlap which is going to cause response hot spots. Plus, since you will have two different sources that are so different you could run into phase issues. The only way to solve that is to take and EQ or Crossover the hell out of the system’s low end. The problem is playing one type of music or movie it's going to be ok, but with something with a different bass structure it's possibly going to be flaky and not natural at all. Plus, it’s going to take forever to get it dialed in just right, and it’ll never be 100% matching.

The large tower or just large bass box idea is a good one, and so is the IB setup but they both have their different properties. I would only go with one and not the other. Personally I would go for a large ported box with a 15” and an 18”. I also wouldn’t go with a car audio sub; I would go with a Pro Audio sub, just for quality reasons.

Nothing against the car audio sub, I am just throwing some ideas out here. I think you need to ask yourself am I going to use 15Hz enough to throw money into a system designed for a 30Hz spectrum. If you are GREAT for you, but I don’t see the need, anyway, it’s all about having fun and if you are and it sounds decent then perfect.

 

[ngsm13 5,000+ posts]

The only problem with doing 2 different bass systems is you are going to have serious frequency overlap which is going to cause response hot spots. Plus, since you will have two different sources that are so different you could run into phase issues. The only way to solve that is to take and EQ or Crossover the hell out of the system’s low end. The problem is playing one type of music or movie it's going to be ok, but with something with a different bass structure it's possibly going to be flaky and not natural at all. Plus, it’s going to take forever to get it dialed in just right, and it’ll never be 100% matching.
The large tower or just large bass box idea is a good one, and so is the IB setup but they both have their different properties. I would only go with one and not the other. Personally I would go for a large ported box with a 15” and an 18”. I also wouldn’t go with a car audio sub; I would go with a Pro Audio sub, just for quality reasons.

Nothing against the car audio sub, I am just throwing some ideas out here. I think you need to ask yourself am I going to use 15Hz enough to throw money into a system designed for a 30Hz spectrum. If you are GREAT for you, but I don’t see the need, anyway, it’s all about having fun and if you are and it sounds decent then perfect.

n00bx.

//content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

nG

 

[thylantyr 10+ year member]

The only problem with doing 2 different bass systems is you are going to have serious frequency overlap which is going to cause response hot spots. Plus, since you will have two different sources that are so different you could run into phase issues. The only way to solve that is to take and EQ or Crossover the hell out of the system’s low end. The problem is playing one type of music or movie it's going to be ok, but with something with a different bass structure it's possibly going to be flaky and not natural at all. Plus, it’s going to take forever to get it dialed in just right, and it’ll never be 100% matching.
The large tower or just large bass box idea is a good one, and so is the IB setup but they both have their different properties. I would only go with one and not the other. Personally I would go for a large ported box with a 15” and an 18”. I also wouldn’t go with a car audio sub; I would go with a Pro Audio sub, just for quality reasons.

Nothing against the car audio sub, I am just throwing some ideas out here. I think you need to ask yourself am I going to use 15Hz enough to throw money into a system designed for a 30Hz spectrum. If you are GREAT for you, but I don’t see the need, anyway, it’s all about having fun and if you are and it sounds decent then perfect.

You have to crossover each system much like you use crossovers on tweeters

and mids //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif Crossover for the woofer system, crossover for the subwoofer system.

In my case, a high pass around 30hz-35hz for the ported 15 array, and a low

pass on the monster subwoofer(s). The first bass system is not using

subwoofer caliber drivers as you need better SQ in the upper bass band.

But the subwoofer system needs high excursion monsters to move air.

No matter how you look at it, it's an esoteric setup. Not many would do this

in a house, but I just threw down the comment because you can

and there is no reason to just settle for one system... go bigger if need be ..

Using an EQ to dial the system in is a given.

 

[joetama 5,000+ posts]

I guess it works if you are going for PA sized setup, but if you want something else, then I would go a different way. I say that because I can. LOL....