IB subwoofers

**Fi Audio** · **12-05-07, 08:58 PM**

We have a new email specifically for the new IB series subwoofers from Fi. Any questions regarding the new 18" and 15" can be directed to IB@FiCarAudio.com. Hopefully this will eliminate some of the back up of IB emails being caught in the flood of regular car audio emails.

The new IB 18 features a 3" coil and a triple stacked motor specific for the IB application (smaller than the older Q series modified IB drivers and a little more purpose built overall).
Specs are:

Re 1.5 Ohms (single 2 Ohm coil)
Le .87mH
Fs 22.9 hz
Qms 3.25
Qes .79
Qts .63
Vas 381 l
Mms 258 g
Sd 1210 cm^2
Spl 89.4 1W/1m

Xmax is 30mm and suspension and motor limit right about at the same time.
At about 500-600 W it hits its linear limits at 20Hz. Power needs will vary accordingly.

These subs are $209 each shipped in the lower 48 States and for orders of 4 or more they are $199.

The smaller 15" IB sub features a 2" voice coil and a purpose built triple stack motor. It is rather efficient for an IB driver and has a very low inductance.
Specs are:
Re 1.6 Ohms (single 2 Ohm coil)
Fs 24.4 Hz
Le .72 mH
Qms 4.00
Qts .77
Qes .64
Vas 269.5 l
Mms 145.4 g
Sd 810 cm^2
Spl 90.0 1W/1m

Xmax is 22mm and is suspension limited (Xmag is 24mm)
Subs are linear limited at about 250W at 20Hz.

These subs are $129 each shipped in the lower 48 States and for orders of 4 or more they are $119.

**Fi Audio** · **12-05-07, 09:00 PM**

Both the 15" and 18" subs are currently available. We do have limited production on both drivers right now and are awaiting the balance of coils to get a stock of 100 of each built up. First 30 of the 18" will go fast... there will be no back order for them as well will have plenty of stock built up soon.

For ordering info please send an email to IB@FiCarAudio.com

Thanks,
Scott

**Sonnie** · **12-06-07, 12:04 AM**

I don't know much about IB, but those prices look ridiculously low. IB'ers should be tickled...

**NickTF** · **12-06-07, 08:06 AM**

Scott, just emailed my order for 4 of these to the above email address. Please have a look and call me/email me if there are any problems. Going to give you a shout later! Can't wait to get four of these running with my plx 3602!!!!!!!!!!!! My house is going to hate me, ha

**Mike P.** · **12-06-07, 02:09 PM**

And your dog, and your neighbours,.....

**funky_waves** · **12-07-07, 03:23 PM**

The 15" looks nice. Some pictures of the 18" would be nice.

**Sonnie** · **12-07-07, 04:02 PM**

Quote:

NickTF wrote:

My house is going to hate me, ha

If you have a house left after a few hours of testing them out...

**NickTF** · **12-11-07, 10:52 AM**

Is the cutout diameter of these woofers the same as that of the other 18" drivers Scott? That is 16.75"?

**Fi Audio** · **12-11-07, 11:30 AM**

Yes, 16.75 is the cut diamter for the hole. You can use the same diamter for front mounting them to the baffle, but I usually put a 1/4" radius on the inner edge just to make sure that it always clears the surrounds.

Thanks,
Scott

**v1rtu0s1ty** · **12-17-07, 06:10 PM**

Quote:

funky_waves wrote:

The 15" looks nice. Some pictures of the 18" would be nice.

Hi funky_waves,

I got mine today. Here are the pictures

**avaserfi** · **12-17-07, 06:13 PM**

Those are some good looking drivers

. Be sure to let us know how they work for you!

**Sonnie** · **12-17-07, 06:25 PM**

That CD standing next to the really places their size in perspective.

**funky_waves** · **12-17-07, 07:47 PM**

Funny, I got mine today too. looks nice so far cant wait to get it set up

**NickTF** · **12-18-07, 07:39 AM**

http://www.avsforum.com/avs-vb/showthread.php?t=956324

There's a link to my build thread using four of these! The 4th is in my office to measure with the router guy who's going to rout the holes for the woofers!

**Sonnie** · **12-18-07, 10:32 AM**

Hey Nick... you should copy your build thread to the Fi Audio forum here at the Shack!

**NickTF** · **12-18-07, 10:34 AM**

Quote:

Sonnie wrote:

Hey Nick... you should copy your build thread to the Fi Audio forum here at the Shack!

Ok Sonnie, I can do that!

Done!

**tintodm** · **12-18-07, 05:50 PM**

Congradulations,

I am making plans to have a friend to order the same on my behalf since i live outside the USA.What was your shipping weight.

**tintodm** · **12-18-07, 06:02 PM**

Quote:

v1rtu0s1ty wrote:

Hi funky_waves,

I got mine today. Here are the pictures

Congradulations

I am making plans to have a friend order the same on my behalf since I live outside the USA.What was your total shipping weight,did they ship all four in one box or separate?

Thnx in advnce.

**NickTF** · **12-19-07, 07:44 AM**

Quote:

tintodm wrote:

Congradulations,

I am making plans to have a friend to order the same on my behalf since i live outside the USA.What was your shipping weight.

Total for all 4 was 120lbs or 30 lbs each.

**tintodm** · **12-19-07, 03:40 PM**

Hi Nick
Thanks for your reply that will help me calculate my shipping costs,Scot also confirmed that they can ship international but now am waiting for him to give me a go ahead on the order.
I cant wait to be the fisrt on these forum to install an IB in Africa he!he!

**Avus_M3** · **02-05-08, 10:57 PM**

Well, my RL's are sold. I think FOUR 18's sound pretty tasty! Hard to beat 29L's of displacement!!!!

Emailed you Scott. Looking forward to receiving these!!!!

**kjgarrison** · **05-24-08, 02:21 AM**

This thread looks stale.

Are these still available? If so, where can I get a diagram with dimensions? It's close between fitting 18's or settling for 15's.

Thanks

**Fi Audio** · **06-26-08, 09:12 AM**

Definitely still available... and in stock (all other Fi drivers are built per order but we have these on the shelves as they are standardized with no options).
I cant seem to find the dims for them, so I will make another chart. But cut dimensions for the basket are 16.75" ID and 18.50" OD for the 18s. 14.125" ID and 15.625" OD on the 15s.

Big difference between the 15s and 18s motor, excursion and power wise as well. The 18s use a 3" coil and larger motor. The 15s use a very purpose built smaller motor and 2" coil.

Thanks,
Scott

**chadci** · **10-23-08, 05:07 PM**

Are these drivers available and is the cost still the same? I am trying to budget out my next build and want to explore all options.

Thanks!

**Eskimo** · **10-24-08, 02:19 PM**

Quote:

chadci wrote:

Are these drivers available and is the cost still the same? I am trying to budget out my next build and want to explore all options.

Thanks!

I ordered mine just the other day and the price is still the same... I was cost-conscious as well, and these are the most displacement for the buck I found.. It doesn't hurt that I have a Fi Q10 in my car, and it's one of the cleanest subs I've ever heard... But I'm not brand loyal, Fi just puts out good stuff!

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