Building an IB

**brucek** · **11-19-06, 08:36 AM**

Quote:

Do I really need the filter at 117.5Hz?

Since the higher frequency filters (100Hz - 200Hz) are created by REW when dealing with a sub only signal, their effectiveness when mains speakers are added is best left to testing. Obviously, the higher the frequency, the less effect a filter has, since the subs signal is over-whelmed by the mains. The best method is to simply do a sweep with sub plus mains and turn the questionable filter on and off. If there's little or no effect, then remove the filter.

Quote:

What will be the best way for me to add a House curve?

The usual method (when it hasn't been offered as a gift) is to raise the wholesale level of the sub signal with the sub amp and then cut the house curve out with filters. The rub is that you can go too far and lose too much signal level feeding the sub, such that you can't develop full power.

As an example, see the picture below.

If I have a sub filtered with the response marked "75dB target, 60Hz cross, no house", and I raise the level of my sub amp by 5dB, the resulting response will look like the line marked "80dB target, 60Hz cross, no house, equivalent to raising...".

I would like the response to look like the line marked "75dB target, 60Hz cross, 5dB house to 30hz". Simply filter the area marked in yellow.... I think you get the idea..

house curve.jpg

brucek

**Rodny Alvarez** · **11-19-06, 06:38 PM**

Thanks!!

Watch the 3Doors Down DVD dts (Live from Houston Texas) and the bass is amazing,
The DVD has really good sound, if you like alternative you better buy it!!
Master and Commander

.
Here more pics....

IB panel 047.jpg

IB panel 048.jpg

IB panel 049.jpg

IB panel 050.jpg

Brucek, thanks!!

So far this is what I did, need to play with it some more.

5dbcurve.jpg

**Sonnie** · **11-20-06, 12:58 AM**

Spectacular!

........AWESOME! ....

**Otto** · **11-20-06, 01:03 AM**

Rodny,

Nice job. Very slick!

**Wes Whitmore** · **11-20-06, 07:33 AM**

Wow, flat to 10 Hz...

**Rodny Alvarez** · **11-21-06, 07:37 AM**

Thank you guys!!!

Now I need to finish the other side, more sanding, sanding, sanding and paint

Thanks to everybody for the help so far!

I'm off tomorrow so I'll be watching some movies, today I have to pic a copy of ICE AGE 2, love this animated movies

**Sonnie** · **11-21-06, 07:40 AM**

You could come down tomorrow and help me... we'll take a break and watch Ice Age.

**Rodny Alvarez** · **11-21-06, 06:52 PM**

Quote:

Sonnie wrote:

You could come down tomorrow and help me... we'll take a break and watch Ice Age.

**Wes Whitmore** · **11-21-06, 07:34 PM**

People have been using fleece in the car audio work for a while now. It's cheap, and stretches easily.

**Chrisbee** · **11-22-06, 06:18 AM**

I've done quite a lot of GRP over the years but fleece wasn't part of the scene.

All the TV screens at most of the local dealers are covered in Ice Age 2 at the moment. I haven't actually heard a single sound coming from any of the screens so it could be a silent movie as far as I'm concerned.

Does it have some decent bass?

**Rodny Alvarez** · **11-22-06, 11:12 AM**

Quote:

Chrisbee wrote:

I've done quite a lot of GRP over the years but fleece wasn't part of the scene.

Some people use t shirt material or speaker grille cloth or anything the stretches real good, it just depend on how big the piece you building.

Quote:

All the TV screens at most of the local dealers are covered in Ice Age 2 at the moment. I haven't actually heard a single sound coming from any of the screens so it could be a silent movie as far as I'm concerned.

Quote:

Does it have some decent bass?

To me it has pretty good bass, There are scenes where the bass will hit pretty hard, :holycow:

**Owen Bartley** · **11-24-06, 07:47 PM**

Rodny, excellent work, it looks fantastic. Really great job. Did I read that you were building a second??

**Rodny Alvarez** · **11-24-06, 08:03 PM**

Quote:

Owen Bartley wrote:

Rodny, excellent work, it looks fantastic. Really great job. Did I read that you were building a second??

Thanks!!!
There is two line arrays in my room one is on the left and one on the right, left side panel is done, the panel one on right is the one I'm working on.

I'm going to order some blue LEDs to put around the plexi, when the LEDs are turn on the plexi around the sub will glow.(it will be just the ring around the sub).

**Rodny Alvarez** · **12-06-06, 10:36 PM**

Finally finish my Line arrays

The neon lights came in today and I just finish installing them, here is some pics of the final product.......
Next is finding the spot for my Audio Tiles.

Thanks again for the HELP!!!

HT 077.jpg

HT 078.jpg

HT 082.jpg

HT 085.jpg

HT 086.jpg

HT 092.jpg

HT 095.jpg

**Bent** · **12-06-06, 10:52 PM**

Rodny, looks really awesome - the showmanship with the neon is terrific, but not overdone.

The 2nd last pic from the Sarah Mclachlan video... I recognize who looks like David Sinclair on the guitar, but the gal? Is that a recent Camille Henderson?

**Sonnie** · **12-06-06, 10:57 PM**

We need to start a DIY project of the month... this one would no doubt win!

Excellent job Rodny...

(I'm gonna see and hear them soon!)

**Rodny Alvarez** · **12-06-06, 11:09 PM**

Quote:

Bent wrote:

Rodney, looks really awesome - the showmanship with the neon is terrific, but not overdone.

The 2nd last pic from the Sarah Mclachlan video... I recognize who looks like David Sinclair on the guitar, but the gal? Is that a recent Camille Henderson?

Thanks Bent!!!

Yes that's Camille Henderson!

**Rodny Alvarez** · **12-06-06, 11:15 PM**

Quote:

Sonnie wrote:

We need to start a DIY project of the month... this one would no doubt win!

Excellent job Rodny...

(I'm gonna see and hear them soon!)

Thank you Sonnie!
I need to get Walter and you here so we can tune the system

5 ears are better then 2

I figure you have at least one good ear

**SteveCallas** · **12-06-06, 11:38 PM**

Boston VR3s I see

Looks like you're all set.

**Sonnie** · **12-06-06, 11:50 PM**

Yeah... and the lucky rascal gets them at cost too. Which is one reason I've been eyeballing VR3's. I figure Rodny needs two sets... one set for his house and one for mine....

... since we are such good friends.

**SteveCallas** · **12-07-06, 12:24 AM**

I could always use some beefier surrounds too

Hook it up Rodney

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