Building an IB

**Rodny Alvarez** · **10-19-06, 08:49 PM**

Hey guys!
I want to build my own sub box ported or sealed or a IB manifold, just don't know were to star, what subs to use, what size box, ports, manifold etc...

I will like some input from you guys.
I want to use 12's or 15's, maybe 4.
I watch movies(80%) and listen to music(20%).
Hopefully Sonnie

will call me so I can help with his project, that way I can learn something and listen to the subs and maybe a good lunch

and who knows maybe I get pay.

Look at this subs, is this something the I can use? http://profesional.beyma.com/ENGLISH/producto.php

**Sonnie** · **10-19-06, 10:08 PM**

I will definitely let you help me with mine

I just gotta get everything together tool wise and the wood too. I'm about to free up a lot of my time since the grass and land work is about to subside with cooler weather... plus it won't be blistering hot in that attic. PAID??? :raped: Yeah... maybe a sandwich... heehee

I'm gonna suggest going with the four SoundSplinters, but you'll have a better idea once get mine installed. I doubt anyone has ever tested the Beyma subs... strange as they are. I think there best XMAX is about 10mm anyway.

**Rodny Alvarez** · **10-19-06, 10:26 PM**

Super large from Quizno's will b fine!!

and diet coke.

**Sonnie** · **10-19-06, 10:39 PM**

Do you forget you'll be in Luverne, Alabama ... lol We got a Subway, Mickey D's and Hardee's... and the convenient mart has some of those refrigerated microwaveable sandwiches that our last dog probably wouldn not have eaten.

**Rodny Alvarez** · **10-19-06, 10:59 PM**

I guess we can do it redneck style DEER sandwich

or rabbit

**Sonnie** · **10-19-06, 11:00 PM**

Nope... I don't do either of those. Got opossum!

**dynamowhum** · **10-19-06, 11:15 PM**

Once worked with a guy who inherited his grand mas recipe book. In it was directions for cooking a skunk. You talk about poor folk.

**Rodny Alvarez** · **10-19-06, 11:16 PM**

They taste just like chicken!

I guess is you and me on this tread.

**dynamowhum** · **10-19-06, 11:29 PM**

True true. You might look up Cult of the Infinitely Baffled for IB stuff it is the source. Make sure you read the Facts page before you ask a questions as they can be a bit rough on a noob that asks the same old questions. They have all sorts of recommendations there.

**Sonnie** · **10-20-06, 09:55 AM**

Fred is right Rodny.... The Cult is a good read when you have time and they have tons of pics of IB projects. I spent quite a bit of time over there checking things out and asking a few questions.

**Rodny Alvarez** · **10-20-06, 09:07 PM**

Thanks 4 the help!!

**Rodny Alvarez** · **11-06-06, 08:21 AM**

Here are some measurements....
I'm trying to figured out were to put my IB.
I put the sub in the listening position and measured from 10Hz to 200Hz sweep and these are the results.
Would like some input!

LF1
sub lf 1.jpg
LF2
sub lf2.jpg
LF3
sub lf3.jpg
RF1
sub rf1.jpg
RF2
sub rf2.jpg
RF3
sub rf3.jpg
LOC5
sub loc 5.jpg

Slide1.JPG
thanks!!

**brucek** · **11-06-06, 08:58 AM**

I like LF1 the best.

Best low frequency gain....fairly smooth response, easily equalized peak at 100Hz....least chance of localization.

sub.jpg

brucek

**Sonnie** · **11-06-06, 10:22 AM**

At first look I liked LF3 and LOC5... LOC5 seems to have the deepest extension, which I think is kinda the idea with an IB.

LF1 does have a trough from 50Hz - 80Hz but maybe that could benefit a house type curve.

You might locate two of your subs at LF1 and two at LOC5 and crossover the LOC5 at 50Hz-60Hz to help eliminate localization. I have one of my SVS subs up front and one in the rear, the one in the rear is crossed over at 60Hz... never a hint of localization.

**Darren** · **11-06-06, 11:16 AM**

The best position is usually between the mains at the front of the room if the room permits. If there is a big null introduced in that position I'd consider an alternate but middle of the room in front tens to be the most transparent and integrates the best.

**Rodny Alvarez** · **11-06-06, 07:40 PM**

Attic pics...
Slide1.JPG

HT 007.jpg

HT 008.jpg

HT 013.jpg

HT 014.jpg

HT 015.jpg

**Rodny Alvarez** · **11-06-06, 08:58 PM**

Quote:

Darren wrote:

The best position is usually between the mains at the front of the room if the room permits. If there is a big null introduced in that position I'd consider an alternate but middle of the room in front tens to be the most transparent and integrates the best.

That was one of my first options, between the mains, but I don't want to used the garage for the IB back wave, it will rattle like crazy concrete floors, metal door nothing to absorb the sound. At least I think the attic will be little better

the neighbors......

**Chrisbee** · **11-07-06, 01:59 AM**

I should seal your roof against all that snow first.

What is the white insulation made of?

I've seen it before on some of the the IB Cult installation images.

**Sonnie** · **11-07-06, 08:35 AM**

Yeah... what is that stuff made of... I've got like 2' of it in my attic...

**kano32** · **11-07-06, 06:03 PM**

Quote:

Sonnie wrote:

Yeah... what is that stuff made of... I've got like 2' of it in my attic...

I believe it is a cellulose or cotton fiber insulation.

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