IXL-18.4 Published Specs

[mrogowski 6]

So after randomly selecting units and testing them (after a good burn-in period) here are the published specs for the new IXL-18.4. You may find them better than the original(s). Even I am pleasantly surprised:

IXL-18.4

Thiele-Small parameters:

Fs = 17.7 Hz

Re = 3.4 ohms[dc]

Le = 6.09 mH

Qt = 0.37

Qes = 0.39

Qms = 5.59

Mms = 434.34 grams

Rms = 8.69 kg/s

Cms = 0.184 mm/N

Vas = 274.1 liters

Sd= 1029.22 cm^2

Bl = 20.51 Tm

Lp(2.83V/1m) = 91.60 dB

If I have enough time this weekend, I'll do some testing and post some graphs.

Best,

Mark

EDIT: Le has been changed to a more accurate number. This measurement was taken using a 100Hz test frequency.

[cobbpa 0]

Can I get outside diameter and mounting depth measurements? Thanks Mark!

Edited June 21, 2007 by cobbpa

[DevilDriver 28]

Pleasant surprise is an understatement. Those who were very concerned about enclosure size before should be a little bit more comfortable: huge drop in Vas and Qtc .707 is about half now what it was before (down to around 3.75 cubes from around 7 cubes before).

Seems very promising Mark.

[DS-21 0]

So after randomly selecting units and testing them (after a good burn-in period) here are the published specs for the new IXL-18.4. You may find them better than the original(s). Even I am pleasantly surprised:

IXL-18.4

Thiele-Small parameters:

Fs = 17.7 Hz

Re = 3.4 ohms[dc]

Le = 10747.13 uH

L2 = 6564.99 uH

Perhaps a stupid question, but I have the agility to convert units of a law student. Is the inductance of this driver 10.7mH or 1.07mH?

[DevilDriver 28]

So after randomly selecting units and testing them (after a good burn-in period) here are the published specs for the new IXL-18.4. You may find them better than the original(s). Even I am pleasantly surprised:

IXL-18.4

Thiele-Small parameters:

Fs = 17.7 Hz

Re = 3.4 ohms[dc]

Le = 10747.13 uH

L2 = 6564.99 uH

Perhaps a stupid question, but I have the agility to convert units of a law student. Is the inductance of this driver 10.7mH or 1.07mH?

1 uH (micro Henry) = 0.001 mH (milli Henry

1 mH = 1000 uH

10747.13 uH = 10.75 mH

Inductive corner frequency is determined by

f = Re/(2Pi*Le)

f = 3.4/(2*3.14*0.01075)

f = 3.4/0.06751

f = 50.36 Hz

[cycle252 0]

Now that i know i have enough volume to do one in a ported box with optimal conditions... I wonder what one would sound like in a 4th order . Time to compare the IXL's to the mj's mark

Edited June 21, 2007 by cycle252

[Puggsley456 0]

Wow mark what changes were made to decrease the Vas so much? Either way Nice Job! Now if only it were a dual.

[DIYiT 0]

What is the official Xmax (and XMech too?) Is it the same as the prototype?

[mrogowski 6]

Published Le numbers seem to be a bit out-of-bounds for the design. I will be verifiying this tomorrow using a rather expensive LCR device to get a better reading. I'll post the results here.

The X readings are the same as the prototype.

Best,

Mark

[mrray13 30]

hmmm...you are making me want to yank the back seat outa the truck again..lol...

adn do a pair of these things, lol...

wheeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee

[DS-21 0]

1 uH (micro Henry) = 0.001 mH (milli Henry

1 mH = 1000 uH

10747.13 uH = 10.75 mH

Inductive corner frequency is determined by

f = Re/(2Pi*Le)

f = 3.4/(2*3.14*0.01075)

f = 3.4/0.06751

f = 50.36 Hz

I thought that the quoted

Edited June 22, 2007 by DS-21

[mrogowski 6]

Here is the output of the IXL in a 260 litre bass reflex enclosure tuned to 17Hz. The green line is the driver, the yellow is the port. Measurements are nearfield - mic was placed one inch from driver and port. The port measurement has a 24db/oct xover applied at 100Hz for clarity.

[Aaron Clinton 2,372]

Nice and low Fs and nice QTS for many different enclosures.

[gmilitano 0]

Here is the output of the IXL in a 260 litre bass reflex enclosure tuned to 17Hz. The green line is the driver, the yellow is the port. Measurements are nearfield - mic was placed one inch from driver and port. The port measurement has a 24db/oct xover applied at 100Hz for clarity.

Mark, did the video turn out?

I was at Mark's when the testing was done. This driver can move a lot of air! How come you guys can't listen to music at 85-90dB?

[Puggsley456 0]

Here is the output of the IXL in a 260 litre bass reflex enclosure tuned to 17Hz. The green line is the driver, the yellow is the port. Measurements are nearfield - mic was placed one inch from driver and port. The port measurement has a 24db/oct xover applied at 100Hz for clarity.

Mark, did the video turn out?

I was at Mark's when the testing was done. This driver can move a lot of air! How come you guys can't listen to music at 85-90dB?

ppppsshhhh........I fart 85db....LOL

I wanna see this vid

Edited June 25, 2007 by Puggsley456

[mrogowski 6]

Hmm... I figured you would be louder than that Puggs.

Here's a vid:

IXL

[Puggsley456 0]

Hmm... I figured you would be louder than that Puggs.

Here's a vid:

IXL

HAHA......sounds like you had the wife outside cutting the grass while you played with your new toy.

Was that in a tube? Get some music on it!

[Aaron Clinton 2,372]

Good movement from that beast. For some reason I had the song "Cat Scratch Fever" pop into my head when I watched that.

[vitod 0]

Nice movement! Can't wait!

[mrogowski 6]

HAHA......sounds like you had the wife outside cutting the grass while you played with your new toy.

Was that in a tube? Get some music on it!

Don't you know it! It was 32*C outside and she was sweating bullets, while Gio and I were inside the air conditioned house sucking on beers and watching the walls move...

Now that's a dedicated wife!

[Aaron Clinton 2,372]

HAHA......sounds like you had the wife outside cutting the grass while you played with your new toy.

Was that in a tube? Get some music on it!

Don't you know it! It was 32*C outside and she was sweating bullets, while Gio and I were inside the air conditioned house sucking on beers and watching the walls move...

Now that's a dedicated wife!

[Puggsley456 0]

Looks really good! If only the IXL's had different voice coil configs....

[mrogowski 6]

Just for you, I'll attach an extra pair of connectors on the basket and you can connect wires to them. Then you can pretend its a dual coil sub...

[Tirefryr 1,742]

Mine come tomorrow. They will make lovely trinkets.

[Puggsley456 0]

Just for you, I'll attach an extra pair of connectors on the basket and you can connect wires to them. Then you can pretend its a dual coil sub...

I'm good at pretending.