4 Fi Audio IB3 18's walled off 15Hz tune in a VAN BUILD LOG - AVS Forum
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post #1 of 304 Old 02-28-2010, 09:23 PM - Thread Starter
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Most likely a Buick Rendezevous... like last year, I'll set out tomorrow and may have one by the end of the day... but last time I ended up with an Aztek... we will see how it goes this time. I currently have 4 Adire Audio Extremis 6.4's, 2 CSS FR125S's, and 2 Vifa XT25TG30 ring radiators. I have a Kicker KX850.4 with a bad crossover on 1 channel for the 6.4's, a KX350.4 to be bridged 8ohm on the 4" full rangers, and a KX200.2 thats blown for the tweets. I can send the amps in to Kicker for repair, but I might just buy all new ZX series..IDK yet.

I'll be getting some SHURiKEN SK-BT80 batteries from SicAudio, a HO alt, and proably some audiopipe ap3000d's... Alpine W200 w/ Alpine PXA-H701.

I'll wall off the van with a few layers of MDF, 14" sonotube port in the center of the quad 18's... but no enclosure on the back side. I know I know... owell. After stripping it nekid, I'll use expanding foam to fill in everything I can then try to get a large quantity of resin to coat everything. Make it as air tight and rigid as possible. How sweet to pull up in the lanes and pop open the hatch and burp... unless I get more port gain with the hatch shut. This should be interesting, as the wall will divide the van into 2 chambers... the port connecting the 2... windows up IDK. Windows down, 6th order to the world. Will there be two tunings? a double impedance saddle? 2 low excursion points? we will have to see.

I'm also doing an HT build calling them the Twin Towers... dual 128 cubic foot enclosures each with an IB3 18" with a 12" sonotube port starting with a 6.5Hz tune and working my way up to 15Hz. Another learning/experimenting project.
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post #2 of 304 Old 03-01-2010, 11:56 AM
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I believe, you opening the hatch in effect raises the port tuning. Tuning frequency is determined by a specific volume, a specific amount of port area and the tuning frequency is adjusted by the length. Opening the doors on your van suddenly makes a specific volume of X cubic feet jump to infinity. So your "15 hertz" tuning with the sonotube of Y length becomes moot because of the increase in "enclosure volume. or rather if you keep the front doors closed the enclosure is the passenger area. All sorts of issues with this design that potentially can cause a bunch of headaches. I am also betting that you will NOT be posting superior numbers. You are well below the resonant freq. of the van. To be loud you burp the vehicles resonant freq. Just my opinion. I look forward to seeing what happens.

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post #3 of 304 Old 03-01-2010, 03:05 PM - Thread Starter
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Look what I picked up today!



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post #4 of 304 Old 03-01-2010, 03:14 PM - Thread Starter
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Quote:
Originally Posted by cubdenno View Post

I believe, you opening the hatch in effect raises the port tuning. Tuning frequency is determined by a specific volume, a specific amount of port area and the tuning frequency is adjusted by the length. Opening the doors on your van suddenly makes a specific volume of X cubic feet jump to infinity. So your "15 hertz" tuning with the sonotube of Y length becomes moot because of the increase in "enclosure volume. or rather if you keep the front doors closed the enclosure is the passenger area. All sorts of issues with this design that potentially can cause a bunch of headaches. I am also betting that you will NOT be posting superior numbers. You are well below the resonant freq. of the van. To be loud you burp the vehicles resonant freq. Just my opinion. I look forward to seeing what happens.

opening the hatch makes the world my enclosure volume... so the port will have much less effect

I'm not going for loud or I wouldn't use IB3's I'd use Wardens or BTLs or SOLOX's or DDZ's
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post #5 of 304 Old 03-03-2010, 07:40 AM
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Quote:
Originally Posted by kryptonitewhite View Post

opening the hatch makes the world my enclosure volume... so the port will have much less effect

I'm not going for loud or I wouldn't use IB3's I'd use Wardens or BTLs or SOLOX's or DDZ's

Not to argue, I swear. in another forum, we were discussing the merits of IB installation. Since an automobile is a high pressure environment, especially for subs, the normal real world parameters get skewed and obviously don't behave the same way as in an open environment. That said, one of the things that was brought up was that the enclosure that is truly seen is the highest pressure area in an IB configuration. So in your installation, the passenger cabin becomes the airspace the woofer sees when your doors are closed.Since it truly is the smallest area. This of course will affect the tuning of the port I think.

To be honest Krypton, I haven't messed with IB in a car since like 92 or so. I put 4 mtx IB subs in a grand national. A lot of my posts with you will be me trying to find out if my ideas match real world results. So thanks in advance for being patient with me!!

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post #6 of 304 Old 03-03-2010, 10:44 PM - Thread Starter
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I am so glad you mentioned the smaller volume being what the driver sees! I think it will see them both actually. I brought this up a week or 2 ago!

http://forum.realmofexcursion.com/en...y-thought.html

http://www.avsforum.com/avs-vb/showthread.php?t=1228191

http://www.hometheatershack.com/foru...y-thought.html

how weird is that? You're just about the only person that recognizes this thought man!
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post #7 of 304 Old 03-04-2010, 02:13 PM
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Another thing to watch out for will be power handling of the woofers. IB usually causes the power handling to halve. So if they take 500 watts, 250 will be about the max. I have a friend that is running 2 AE 15's and they are receiving about 95 watts a piece and they rock his car. Obviously they are mounted IB with the trunk/hatch area using a membrane to vent to the outside.

Anyway, just wanted to throw that out there.

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post #8 of 304 Old 03-04-2010, 11:49 PM - Thread Starter
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thats the plan, less power REQUIREMENT the more space, less power to reach same excursion...same output. IB woofers simply have less BL... but I like a HUGE box for a flat/low FR curve anyway..so I need less motor... makes sense eh?
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post #9 of 304 Old 03-06-2010, 05:31 AM - Thread Starter
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I should have posted this here:

Audiopipe AP30001D or Audiopipe AQX3500.1 buying 4 today

What batteries... I was planning 3 SHURiKEN-BT80's... but IDK

http://www.caraudiodeals.com/audiopi...1d-p-1453.html

http://www.caraudiodeals.com/audiopi...01-p-2811.html
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post #10 of 304 Old 03-07-2010, 03:45 PM - Thread Starter
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I guess that amp is 2ohm.. Fi got back, I can get dual 4 so that I have a 4 layer coil instead of a 2 layer coil with a S2.
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post #11 of 304 Old 03-07-2010, 07:43 PM - Thread Starter
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just purchased 6 Fi Audio IB3 18's custom dual 4 ohm. Why? cuz it's double the coil in the gap. Double the wire to split the current flow.
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post #12 of 304 Old 03-09-2010, 07:00 PM - Thread Starter
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post #13 of 304 Old 03-09-2010, 08:58 PM
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Neither. But then again, I am a believer in the Sears Diehard Platinum. 4 year warranty, Made by Oddysey, can get it at any Sears, if an issue, can take back to any Sears. and basically same price as the Deka.

Other than that, Deka. Made in US I believe, great track record. Only 30 bucks more than Chinese made Shuriken.

If you want to go with the Chinese made and cheap, then...

http://stores.ebay.com/Batteryman20

SLA batteries. Basically Battcaps. mucho cheapo

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post #14 of 304 Old 03-09-2010, 09:29 PM - Thread Starter
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Quote:
Originally Posted by cubdenno View Post

Neither. But then again, I am a believer in the Sears Diehard Platinum. 4 year warranty, Made by Oddysey, can get it at any Sears, if an issue, can take back to any Sears. and basically same price as the Deka.

Other than that, Deka. Made in US I believe, great track record. Only 30 bucks more than Chinese made Shuriken.

If you want to go with the Chinese made and cheap, then...

http://stores.ebay.com/Batteryman20

SLA batteries. Basically Battcaps. mucho cheapo

I'll go check out sears tomorrow..thanks man!
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post #15 of 304 Old 03-10-2010, 07:35 PM - Thread Starter
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The Samsung Blu-Rey player I got let me down.. it's loud, sounds like an old printer. If you take the disc out it forgets where it was at and starts over. It can't read any of my burnt CDs, DVDs, or... other material. Sometimes the words don't match the faces on screen. This is compared to the last 2 DVD players I've owned over the years that each cost 30 bucks. So I bought the $100 Blu-Rey .. Magnavox.. so I could give the Samsung to my mother who won't care about all that and wants Netflix live stream. This one is the same... can't read burnt CDs or..other material. Forgets where it was at.

I had $35 of best buy rewards to use up...I figured about $20-$40 for a pair of RCA to XLR cables... they were 99c a piece! So I bought the last 5 they had! So then I had $35 rewards to still burn up, so I got a 100ft spool of Monster Cable I HATE them. Walmart years ago had 50ft spools of yellow 12gauge for 10 bucks. I still have 1 or 2 left cuz I bought like 6 of them 6 or 7 years ago.

Bought rear drums and shoes for the van, as well as plugs, air and oil filter, and oil. The AC clutch is the fan noise problem. I may just pull the entire AC system like I did on my Accent GT and put the HO alt in it's place? Good idea?

I went to Sears today.. $190 for DieHard platinum. $805 for 4 of them. What ya'll think? get those tomorrow morning or order the Shuriken or Delta?

HT receiver and EP4000's shipped yesterday.




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post #16 of 304 Old 03-11-2010, 04:24 AM - Thread Starter
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post #17 of 304 Old 03-13-2010, 04:47 PM - Thread Starter
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I just bought an IVA-W505 and a PXA-H701 today, now I'm working on batteries and HO alt.

I'm pulling my AC and either gonna drop a 2nd used alt and a AD244 stocker, or, a HO alt with the AD244 stocker.DC power , Ohio gen , APS is who missinglinkaudio recommended. nathan of ecessive can do a 200 amp for $345 shipped.
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post #18 of 304 Old 03-14-2010, 01:58 PM - Thread Starter
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Started tear down on the van , going to get wood tomorrow... build in the towers first.













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post #19 of 304 Old 03-17-2010, 09:26 PM - Thread Starter
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So it appears all I have to do is :

http://www.s10forum.com/forum/f27/ho...r-80-a-376788/

I guess I should have a CS130D, find a AD244, and swap?
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post #20 of 304 Old 03-20-2010, 08:35 PM - Thread Starter
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The PXA-H701 came a cpl days ago

Alpine IVA-W505 dvd player on it's way

I have 1 Fi IB3 18, 6 more on the way... 4 for the VAN, 2 for the HT until the 22's come out, and a spair

Going to get dual AD244 alts and maybe a modulator for them

Going to get 4 of those batteries pictured above

Need to get some 12 gauge power wire

Going to order 4 AP30001D's when they are back in stock

I have a pair ( 3... a spair) Vifa XT25TG30 1" Ring Radiators to be run with the Kicker KX200.2

2 CSS FR125S full range 4.5's to be run bridged 8 ohms off the KX350.4

4 Adire Audio Extremis 6.4's off a KX850.4













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post #21 of 304 Old 03-21-2010, 05:42 AM - Thread Starter
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had 2 create a new photobucket account! sometimes some show sometimes bandwidth error











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post #22 of 304 Old 03-21-2010, 12:00 PM
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sweet!

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post #23 of 304 Old 03-21-2010, 02:13 PM - Thread Starter
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Quote:
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sweet!

you like? well stay tuned! it's about to get LOUD and LOW!
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post #24 of 304 Old 03-21-2010, 06:37 PM - Thread Starter
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had a rust spot i knocked out today for a dollar. paint dont even match but i dont care its better than rust





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post #25 of 304 Old 03-22-2010, 09:38 PM - Thread Starter
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post #28 of 304 Old 03-25-2010, 12:59 PM - Thread Starter
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here is my old dashboard top..front stage..to my Hyundai Accent GT



now keeping that in mind, imagine similar up here hanging down!









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post #29 of 304 Old 03-25-2010, 06:23 PM - Thread Starter
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whats more fun tha chicks doing your work for you? (OK, helping..but they never take pics of you doin stuff, but you can't stop yourself from taking pics of them..so it appears that way!)

NOTHING!























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post #30 of 304 Old 03-25-2010, 09:27 PM - Thread Starter
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this dude at my local shop told me to disconnect this blue plug from it's blue connector sceen in these pics since the AC clutch went out.

I have 2 side effects now that don't make sense...any guesses?





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