Fi IB3 22

[kryptonitewhite 1]

When I originally heard the IB3 18's Xmech was "shortly after its 30mm Xmax" I assumed maybe it was 31mm-33mm. So when I heard the IB3 22 was going to have a 38mm Xmax and 96% of the Vd of two IB3 18's, I thought the 22" was going to have a lot more Mechanical clearance than the 18's. But the 22's are going to have the same profile surrounds as the 18's, so the same or similar 41mm - 42mm Xmech. I'm not going to be able to replace my 18's with the 22's. At 8 ohms I already have to be careful to avoid over excursion. I planned on running 8 ohms for the 18's for safety, but 4 ohms for the 22's. The 22" isn't going to work.

I'm probably going to have to order a 2nd pair of 18's for the towers. I hate the idea. 1st, a single sub has a much different FR than 2 subs in the same enclosure. 2nd I expected a little lower Fs with the 22's. 3rd I already have the 18's centered, it's gonna look funny adding a second driver to each box.

I considered getting 2 more per box, 6 total, but I dont have enough $$ for that and the odd impedance is another issue. What to do?

[///M5 2,833]

Build something other than the towers.

[ssh 924]

What would the impedance be?

And as M5 suggested, why don't you just build another enclosure? wood is cheaper then another set of drivers.

Is the frequency response from 2 drivers in an enclosure verse 1 going to be that noticeable to the ear?

[kryptonitewhite 1]

Build something other than the towers.

Ive considered before cutting the towers apart and building 4 of the Aztek boxes, but slightly bigger and with 10" ports. So I'd have 4 24-30 cubic foot boxes each with a 10" port and an IB3 18. I'd stack 2 in each corner so it would be close to having the same towers with a divider for the subs. Well, not close, 60 cubic feet for 2 vs 128, but still. Thanks for helping me rethink the idea ///, I think I might do that.

What would the impedance be?

And as M5 suggested, why don't you just build another enclosure? wood is cheaper then another set of drivers.

Is the frequency response from 2 drivers in an enclosure verse 1 going to be that noticeable to the ear?

I'd run each pair at 4 ohm per EP4000. I am running both of the towers 4 ohm on one EP4000 right now to see what it's like. It is very comparable to 1 EP per sub @ 8 ohms.

If I simply keep just 2 drivers and build another enclosure, I don't gain anything. My enclosure volume and port size are for the ultimate efficiency in theory. The idea was, the larger the enclosure, the more efficieny, the larger the port, the more efficiency, so I thought "whats the biggest I can build?" sheets come in 4'x8'... so I used those as all 4 sides and stuck a 12" port in there.

[NDMstang65 403]

If you'd actually use subs that are made for a ported box...and braced the ported box that they are in..you'd gain.

But no matter how many times I tell you that you don't want to listen.

[kryptonitewhite 1]

I decided to cut the towers down to 30 cubes each with a 10" port as suggested, 30" length for a 13.7Hz tune...within 1Hz of the towers tune. I decided to make a final vid of the towers at their true tuning, 13Hz, before i cut them down. I always claim 1hz higher to be safe.

But then, I replotted the same thing I plotted 100 times before I built them:

And it's really, really hard to agree. GREEN is what I really really want! 12Hz-18Hz giant peak, falls off and flat from there up. PINK is terrible! The INVERSE of what i want!

OK, but I have to take into consideration power and excursion. 128 cubes I can give 1000 before 41mm is reached. 30 cubes take 1600.

However, I can't get SPL to plot! what gives? I'm going to assume that with the power given, the 30 cubes box comes a lot closer to the 128. but when i click SPL, the plots disappear!

[kryptonitewhite 1]

If you'd actually use subs that are made for a ported box...and braced the ported box that they are in..you'd gain.

But no matter how many times I tell you that you don't want to listen.

Nick my man, there's nothin wrong with these subs in this box! They do AWESOME! Its just that Ive been waiting 2 years for your 22's since I love the 18's so much. Ive had the output of two 22's ( four 18's) in mind all this time, so having *just* two weighs on my mind. Now I am bummed having finally figured out (if you havent noticed, Im kinda slow ) that one 22 isn't going to have double the output Im getting from one 18.

But I do agree with you, I need to brace these suckers and that should help. I got more 2"x4" last weekend, Ive already had some sitting around for them for a while, but I wanted to wait to brace until I cut the sub holes larger for the 22's so I can get longer braces inside.

I do listen, I jsut disagree I mean, if you offer me a free upgrade to ANY of your AA/Fi lineup I just cover shipping, sure thing man... my dumbass would put BTLs, Mayhems, Havocs, or SMDs in the damn thing...if it were the same $199 per man!

[kryptonitewhite 1]

OK, the last 2 boxes I built for locals used 3 12's ported, I made them into a diamond shape and liked it. What if I recone all 6 IB3s and use those for the HT and bought 4 new IB3s for the van.

Can I do 3 D2's series/parallel for 3 ohms? Should I do 3 D4s parallel series for 6 ohms?

[///M5 2,833]

Perhaps something other than the IB's would suit you WAY FUCKING BETTER.

[Tyan 1]

i guess its all about the IBs

i have one myself IB2 18" ..but i still didnt got the chance to test it

Edited August 13, 2010 by Tyan

[kryptonitewhite 1]

THERE IS NOTHING WRONG WITH THE IB3S

ITS NOT THE APPLICATION

THE IB3S ARE AS LOUD AS WERE EXPECTED. THE 22S WERENT OUT YET. NOW I REALIZE WHEN THEY ARE, THEY ARENT GONNA MOVE AS FAR AS I ASSUMED THEY WOULD

IF I PUT MAELSTROM X, AVALANCHE, OR RL-P, I WILL NOT GAIN ANYTHING FROM 20HZ DOWN

[aimone 4]

every time i see ur setup i literally blert out "whats the pucking point?" ur waisting all that room on 2 subs. that look retarded in such big box's. why not get real subs and ditch that infinite baffle b.s. i dont know shit bout home theatre but im positive i've had my bedroom doin the same shit with 2 entry level treo 15's and a 500.2 fosgate amp powered by a psu that couldnt fully push the amp while watching movies on my laptop. but to each his own i guess even if its special olympics status

[kryptonitewhite 1]

every time i see ur setup i literally blert out "whats the pucking point?" ur waisting all that room on 2 subs. that look retarded in such big box's. why not get real subs and ditch that infinite baffle b.s. i dont know shit bout home theatre but im positive i've had my bedroom doin the same shit with 2 entry level treo 15's and a 500.2 fosgate amp powered by a psu that couldnt fully push the amp while watching movies on my laptop. but to each his own i guess even if its special olympics status

let me see a 13Hz sine wave video please. if it looks 1/2 credible, ill spend the money for a mic and get REW. Im calling your bluff.

[beatindowndablock247 0]

i really thought about gettin 2 18 inch ib3's but wasnt sure on sound to quality due to the good a$$ price. how would you rate those

[Julian 641]

Perhaps something other than the IB's would suit you WAY FUCKING BETTER.

Sean, I just LOL'd Literally.

[Duran 387]

i really thought about gettin 2 18 inch ib3's but wasnt sure on sound to quality due to the good a$ price. how would you rate those

Who said you have to pay a lot for sound quality?

[beatindowndablock247 0]

i really thought about gettin 2 18 inch ib3's but wasnt sure on sound to quality due to the good a$ price. how would you rate those

Who said you have to pay a lot for sound quality?

i was just saying that for such a good price for an 18 inch sub i wanted to hear from someone who bought the sub about how it sounds.. im still debating on maybe gettin rid of my 2 mtx 9515's for 2 of those but im not sure. i love the way the 9500's sound in my car

[onebadmonte 235]

i really thought about gettin 2 18 inch ib3's but wasnt sure on sound to quality due to the good a$ price. how would you rate those

Who said you have to pay a lot for sound quality?

i was just saying that for such a good price for an 18 inch sub i wanted to hear from someone who bought the sub about how it sounds.. im still debating on maybe gettin rid of my 2 mtx 9515's for 2 of those but im not sure. i love the way the 9500's sound in my car

I've got a pair. They sound great. I was very easy to setup and get a natural sound out of them. There is a good amount of output as well. Enough for a good nightclub feel. It's tough to compare to the MTX 9500 with it's massive amounts of output in a box.

[Hzd Skizzy 27]

i thought ib3s were made for infinite baffle setups.

[ssh 924]

i thought ib3s were made for infinite baffle setups.

They are, but some people think if you put them in a large enough enclosure then it's the same as IB.

[Hzd Skizzy 27]

but thats not right. If they want a large enclosure just get a SSD 18 or something i mean i bet that would be way better than ib3 in a box.

[ssh 924]

but thats not right. If they want a large enclosure just get a SSD 18 or something i mean i bet that would be way better than ib3 in a box.

Tell that to Kryptonwhite... Numerous highly reputable people have tried telling him whats best for his goals and application wise, but he seems to think he knows better.

[Duran 387]

Infinite baffle is considered when the enclosure is 15-20 x VAS.