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Increase DB Sealed Chamber : AFTERMATH (Read 11878 times)
gexter
Ex Member



Re: Increase DB Sealed Chamber?
Reply #30 - 04/12/06 at 23:35:18
 
biju
Excellant work.. sorry about your finger man.
I like the whole build, it is something to be proud of.
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J_Rock
Ex Member



Re: Increase DB Sealed Chamber?
Reply #31 - 04/13/06 at 21:15:21
 
Wow man, i am so emotional right now.  

I got a rush seeing your awesome work so far.

Then I got all worried for you for your finger cut.

Then I laughed when you mentioned Kill bill and the squirting blood effects.

LOL.  Get well, nice work, talk to you again soon!
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biju
Ex Member



Re: Increase DB Sealed Chamber : AFTERMATH
Reply #32 - 04/23/06 at 02:00:00
 
Hey DB junkies!

I've got great news.  

1) Finger's healing nicely.
2) My surgery was a success.
3) As of today the finished amp-rack is in, DB's installed and wiring complete.  In other words, all's installed in the VechiCROSS!
Cheesy Cheesy

What's left?  Tuning.  I need to tune everything (find the xover points I like, set the parametric eq, then adjust amp gains, etc.)  I plan to do that tomorrow a.m., as tonight I'm completely wiped out!!!  After that I'll post pictures, my wrap up thoughts on the build, and the end results!

-biju.
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biju
Ex Member



Re: Increase DB Sealed Chamber : AFTERMATH
Reply #33 - 04/24/06 at 00:55:11
 
*sigh*

That sigh?  A sigh of relief - relieved to have this project done, and the satisfaction of knowing all turned out better than I could ever have thought (especially as I consider myself a car audio novice).  I'd never make it as a car audio professional, as I'm way too slow & clumsy (see finger hack job in previous post). LOL...

The original question was what would happen if the sealed chamber of the DB was increased?  In short, I won't know that answer until I build another DB to spec. and compare.  I plan on doing this eventually (for the home), but it will be a while.  The question was asked originally because I knew I wanted to use the MTX 8410-44’s, and was concerned about the sub’s displacement, and I wanted to make sure that I could get them to hit as low as I possibly could without changing the plans too much. Other considerations were making sure they’d still fit into my design, etc.  In the end, as mentioned previously, the sealed chamber was lengthened by one inch.

The boxes weren’t too hard to build, but I did take my sweet time with them. Lots of sanding, and making sure everything was accurate. The amprack on the other hand did prove to be a bit of a challenge.  Making everything clean with hidden inputs, holes, assembly, etc., was a pain in the arse.  It was also tricky to make sure that the amprack was securely mounted to the vehicle – however I was able to resolve that issue with some ingenuity and a few special order bolts…  If you read my previous posts I wanted to finish the rack in vinyl, however, after a few test runs I quickly discovered that the vinyl wasn’t as forgiving when it came to blemishes in the wood, etc.  Padding helped that issue, but ended up looking too bulky for me.  In the end, I went with good ol’ old-skool sub box carpet for the finish. I dunno, it looks good enough I suppose.

Power is provided by Stinger all the way around. 0/1 gauge supply to a distributor that splits into 4 – 4 gauge power wires (between the DB’s). The old-skool PPI’s have standard 8 gauge inputs, so to accommodate this I bought eight 4 gauge to 8 gauge reducer adapters. They look sweet in addition to being functional.

After wiring everything I was more than happy to power her up. Gently turned up the volume 1/4 of the way and heard sweet sweet sound. (everything flat, no processing).  I was pleased with what I was hearing.  However, a little intimidated to turn it up until xover and tuned, etc.  Played with the setting’s a while, and came up with settings that I felt really pushed the DB’s.  (I was anxious to hear them both in concert pushed to the limits!).  Here’s the settings:

# Crossover #
[Frequency(Hz)/Slope(dB/oct)/Level(dB)]
Front:160.0/24/-1
Center:160/24/-1
Rear:160.0/24/-1
SW:63.0/24/-1

# Parametric-EQ #
[Frequency(Hz)/Level(dB)/Width(Q)]
Band1:40.0/+6/3
Band2:125.0/-3/3
Band3:1.0k/+4/3
Band4:2.5k/+5/3
Band5:8.0k/+6/3

I’ve got the ability to set six parametric configurations, as well as six xover configurations – so I’ll be playing with those more in the future to accommodate various musical genres. But for now, the above is what I went with to initially hear the system pushed.  With the gains set properly I finally cranked her up!  LOL, OMG, WTF?!!!  PURE INSANITY!!!!  There was nothing but crystal clear sound as loud as I could take her (or stand it). The sound was full, rich, deep, crisp, pleasing tones from across the spectrum.  Bass tones literally blurred my vision and took my breath as the DB’s executed them effortlessly.  A friend who came over later to watch the Nuggets game with me sat in the VehiCROSS as I cranked it up.  With the same blurred vision I was experiencing he looks and tries to yell over to me, “I can feel the bass crushing my nuts!”.  My labors are validated.  LOL…  I wanted the ability to enjoy DEEP clean bass as well as overall SQ on demand.  I’m pretty sure mission accomplished!

Setup:

Optima Yellow Top
Stinger 0/1 & 4 gauge power/ground
10 gauge speaker wire throughout
Stinger HPM 0/1 gauge to 4 – 4 gauge dist.
Alpine CDA-9835
Boston Acoustic Pro 6.5 (Front)
Boston Acoustic Pro 5.5 (Rear)
Alpine SBS-05DC DIN center channel
2 – MTX 8410-44
2 – PPI A600 @ 3ohms
PPI A1200 @ 4ohms
PPI A100 @ 4ohms

Here are the final pics of the build.  Thanks for reading.  Enjoy!












-biju.

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Adrian D.
Ex Member



Re: Increase DB Sealed Chamber : AFTERMATH
Reply #34 - 04/24/06 at 05:07:49
 
smashing install. i'm all like him >  ;D
and now, the question i've been waiting to ask : with that much xmax(about 26mm IIRC) on the mtxs, do you get any port noise ?
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DirtDawg
Ex Member



Re: Increase DB Sealed Chamber : AFTERMATH
Reply #35 - 04/24/06 at 13:43:02
 
Very nice, indeed, biju! Excellent choice of colors, too.

I only have one criticism. Shouldn't your tagline read:

..... cut cut cut cut cut cut cut cut cut "5HIT!!!"

Glad it's healing up OK. Smiley
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biju
Ex Member



Re: Increase DB Sealed Chamber : AFTERMATH
Reply #36 - 04/24/06 at 23:10:08
 
Thanks guys!  I appreciate the feedback...

The port noise is pretty much a non issue.  Until you asked the question I hadn't even thought about it (as there is little to none).  I was able to round out (router/sand) the half-moon, so maybe that helped?  As the system plays I did put my hand over the port hoping to find massive amounts of air being moved. To my surprise that simply wasn't the case...  Very strange - but what the hell.  I can't argue with results...

The only real issue I have now is to track down and find where this nasty alternator whine is coming from...  I'm pretty sure it's the ground to the headunit, as I kind of hurried myself through that part.

Thanks again for reading...

-biju.



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60ndown
Ex Member



Re: Increase DB Sealed Chamber : AFTERMATH
Reply #37 - 04/24/06 at 23:21:49
 
i hope you have an alarm, if you were to park that car anywhere near any of the places i have lived over the years you would lose it all? glad it sounds good tho and that is a sweet cut.here's one of my more recent carless moves, opening a package from the mail man too quickly....you are not alone in the reckless wound catagory. Wink

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jj420
Ex Member



Re: Increase DB Sealed Chamber : AFTERMATH
Reply #38 - 04/25/06 at 00:53:13
 
SWEET, this is turning into a gore thread, wish i'd taken a pic of the barbed wire accident before they stitched me up LOL...
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Jet-Lee
Ex Member



Re: Increase DB Sealed Chamber : AFTERMATH
Reply #39 - 04/25/06 at 05:17:37
 
aww damn, all my hacksaw slips are healing up. I might snap a few of what's left, if I deem them worthy.

EDIT- Sweet install man!
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« Last Edit: 04/25/06 at 05:17:50 by Jet-Lee »  
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bean-a-reano
Ex Member



Re: Increase DB Sealed Chamber : AFTERMATH
Reply #40 - 04/25/06 at 06:39:22
 
That is a sick install.  Your hard work was well worth it.
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Hellion
Ex Member



Re: Increase DB Sealed Chamber : AFTERMATH
Reply #41 - 09/30/06 at 07:39:00
 
NICE!!!  I hope you don't mind a little copycatting.  well I'm building a WO for my roomate's Chrysler 300C  I think that rhyno lining will be a good idea.  He is a rich guy who needs everything to look like a million bucks.  I am thinking about hiding the amps and using computer fans to cool them. ???
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biju
Ex Member



Re: Increase DB Sealed Chamber : AFTERMATH
Reply #42 - 10/29/06 at 23:40:37
 

You know you're addicted to car audio when you finish an install and five months later you rip it all out to rebuild once again...

The why?  Well, 1) for the fun of it, and; 2) for more power - of course.

Kiss Kiss Kiss Kiss Kiss Kiss Kiss Kiss Kiss

To anybody interested I'll be selling my two DB's you see above, as well as most of the components (sans the a1200). Questions? - send me a message on this site.

-biju.

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