[mitchjr]

Where did you get that attachment for your drill? I need one of those.
And how is your sub box held together? It looks like you didn't use any screws, just wood glue.

 

[simplicityinsound]

Where did you get that attachment for your drill? I need one of those.
And how is your sub box held together? It looks like you didn't use any screws, just wood glue.

i got mine from the local home depot i think

all my subboxes are wood glue and 1-1/4" - 1-1/2" nails fired through a pneumatic nail gun.

b

 

[eviling]

good lord did i miss a doozy on this one O_O that box surprised the hell out of me the most. i mean when i saw it.. it really hid how deep that trunk was at first. but 2.5 raw space in a tire well..with a battery. thats a big ****ing trunk. 4 of those amps too, holy cow. i heard a system some what like this one once....beautiful system. well masconi with the high end focals, not sure whitch set that is, the one i heard were the 6 i think...i wish i could hear this one though

 

[ibf150]

you sir are an artist, beautiful work. I'm blown away with the attention to details and the quality of the work you have done.

 

[simplicityinsound]

good lord did i miss a doozy on this one O_O that box surprised the hell out of me the most. i mean when i saw it.. it really hid how deep that trunk was at first. but 2.5 raw space in a tire well..with a battery. thats a big ****ing trunk. 4 of those amps too, holy cow. i heard a system some what like this one once....beautiful system. well masconi with the high end focals, not sure whitch set that is, the one i heard were the 6 i think...i wish i could hear this one though

you mean you havent seen this until now?

the trunk is huge... but in the end, when i started to play wtih four of those amps and 2 x 12s...i started to run out of space rapidly lol

 

[eviling]

you mean you havent seen this until now?

the trunk is huge... but in the end, when i started to play wtih four of those amps and 2 x 12s...i started to run out of space rapidly lol

I remever opening it to read once but I only read logs every 2-3 month's just to see what's been going on lol I must of never finished it.

Sent from my EVO using Tapatalk 2

 

[BlackedoutMD]

This is amazingly sexy. Great job!

 

[ovrtrainr]

nice gear, even nicer install!

 

[English audiophile]

Incredible attention to detail and design, you deserve the highest praise indeed. Awesome!

 

[Woosey]

""yrwq

 

[cAsE sEnSiTiVe]

I saw and listened to this system at Bing's a week or so ago. As nice as these pictures are, they still don't do the job he did on this car proper justice.

An extremely impressive build, and more importantly, a very nice and revealing sounding system.

 

[Patrick Bateman]

I'm not trying to be a hater here - this thread is really an inspiration for me. (I just bought one of these cars.)

But the Focal Black Hole is not needed in the sub box. Here's why:

Black hole is designed to combat standing waves. But standing waves cannot form when the duct that they're in is a fraction of the wavelength. For instance, the largest dimension in the sub box is about 24". And a 24" wavelength is 563hz. (speed of sound divided by pathlength.)

Therefore, Focal Black Hole is only needed if the box plays above 141hz.

Now if you're worried about standing waves in a car, actually relocating the sub can make a big difference. For my Genesis I'm trying to figure out a way to get the sub in the center of the car somehow, as that should create the maximum gain. Basically allowing one to use a smaller sub than what they'd need if the sub was in the trunk.

 

[simplicityinsound]

I'm not trying to be a hater here - this thread is really an inspiration for me. (I just bought one of these cars.)

But the Focal Black Hole is not needed in the sub box. Here's why:

Black hole is designed to combat standing waves. But standing waves cannot form when the duct that they're in is a fraction of the wavelength. For instance, the largest dimension in the sub box is about 24". And a 24" wavelength is 563hz. (speed of sound divided by pathlength.)

Therefore, Focal Black Hole is only needed if the box plays above 141hz.

Now if you're worried about standing waves in a car, actually relocating the sub can make a big difference. For my Genesis I'm trying to figure out a way to get the sub in the center of the car somehow, as that should create the maximum gain. Basically allowing one to use a smaller sub than what they'd need if the sub was in the trunk.

that is true, i used it mainly to reduce/eliminate resonance and preventing backwaves (did i say standing waves by mistake? i am too lazy to scroll back and read )...which as i understood, are two of the primary effects of the Five, are those relevant in this case? or are you saying because of the amplitude of the low freq, no back waves would be generated either behind the sub? i am not very well versed when it comes to this stuff, so let me know

b

 

[Patrick Bateman]

that is true, i used it mainly to reduce/eliminate resonance and preventing backwaves (did i say standing waves by mistake? i am too lazy to scroll back and read )...which as i understood, are two of the primary effects of the Five, are those relevant in this case? or are you saying because of the amplitude of the low freq, no back waves would be generated either behind the sub? i am not very well versed when it comes to this stuff, so let me know

b

Due to the size of the wavelengths, they literally cannot form.

One way to to picture this is by imagining if a 10' tall wave in the ocean were to crash into a concrete wall with a 2' tall pipe in the center of the wall. In the pipe there will be no waves; but the wave will form again once the wave passes THROUGH the pipe. But the key is that there will be no waves *in* the pipe, because the wave exceeds the dimensions of the duct. (In this case, a pipe.)

 

[simplicityinsound]

thanks bud now i know...think they do anything for resonance killing? so eliminating standing waves and back waves is the same thing correct?

 

[Yankeesound]

What happened to all the picutures from the fist pages, I saw a few and then got X's maybe it my work computer.

Anyways, this is a crazy sexy install. I love it.

 

[simplicityinsound]

hmm seems to work okay for me?

 

[Justin Zazzi]

thanks bud now i know...think they do anything for resonance killing? so eliminating standing waves and back waves is the same thing correct?

I believe Patrick is trying to say when the dimensions of the enclosure are "small" relative to the frequencies you will be playing, then the acoustics inside the enclosure do not behave like waves like most people think. So the Black Hole material you put inside does not absorb or reduce standing waves, or the back wave, or affect what happens inside that box much at all because it acts more like a temporary pressure vessel with each stroke of the woofer more than an acoustic cavity with echos.

As I understand it, Back Hole and other stuffing materials do however (assuming their density is fairly consistent) reduce the speed of sound as the air molecules travel through the material, effectively fooling the speaker into behaving like it is in a larger enclosure than it really is (lowering it's Q). How this fits cleanly with the previous analogy, I'm not exactly sure.

A standing wave is when sound bounces off a boundary (or many boundaries) and multiple waves of different phase overlap, causing peaks or dips in frequency response. This is dependent on the geometry of the room, position of the speaker, and position of the listener. This is why Patrick suggests moving the sub if you are having standing wave problems because you cannot easily change the geometry of the car or the listener position. But this is not the problem you were trying to solve by adding stuffing to the inside of the sub : )

borrowed from this page of the realtraps website

Eliminating a backwave, or the wave from the rear of the speaker, does not rely on geometry and can be addressed with absorption material adequately thick enough relative to the frequencies. An anechoic chamber tries to do this with multiple feet worth of absorbing foam on all interior walls, but can only be effective down to a certain point where the depth of the foam can no longer keep up with the length of the waves without becoming absurdly difficult to build. In the midrange frequencies however, this is much easier to do because the wavelengths are so much shorter, and treble is even easier still.

Hope that helps!

edit: just realized that question was from 4 weeks ago, oh well. still hope that helps anyways!

-J

 

[simplicityinsound]

cool, just want to clarify, there was no problem to solve i simply followed advice from Focal and the whole notion that there is no kill like overkill

b

 

[rbarker31]

Found who I feel is the best installer in the Austin area, Steve Hester. The install was performed on my 2009 Hyundai Genesis Sedan 3.6 with tech / sport package. Raised floor, custom ported box, single Boston Acoustic SPG555-2 and Zapco DC1100.1. The factory Lexicon system was retained minus the factory sub. Beautiful install with fantastic sound thanks to his tuning skills. PM me if you’re in the Austin / Round Rock / Pflugerville / Central Texas area and would like pics or Steve's email address.