IXL-18 Mk2 - AVS Forum | Home Theater Discussions And Reviews
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post #1 of 45 Old 12-28-2014, 08:41 AM - Thread Starter
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IXL-18 Mk2

Ive decided to take the plunge and build my own sub. I was able to sell off my Earthquake MKV-12 and have enough funds to purchase the sub, wood and tools needed

Im going to be using the IXL 18 meets the "Easy Button" as a general guide for my build.

The sub being used is the IXL-18 Mk2. I know its not the same sub but I figured its close enough and I can make it work.

The box will made with a high quality 3/4" plywood - dimensions should end up being 24 3/4" H&D by 48" L and im hoping to have about a 400L box.

All the wood/tools have been purchased and the sub is shipping out Jan 2nd.

I bought an EPX2800 amp as a impulse buy a few weeks ago so ill be using that to power the sub (it will be more than enough). The amp has RCA inputs and banana plug connectors to keep things simple.

Minidsp and UMIK-1 will be used for calibration and EQ.

Ive done some playing around in WINISD and im having a hard time deciding how im going to tune the box. ANY AND ALL SUGGESTIONS ARE WELCOME (im a noob).

Here are some screenshots of the box tuned to ~13.5hz with a HP of 15hz @ 800W (Do i really need it that low if all i can get is ~97db @ 10hz??)

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box tuned to ~17hz with a HP of 16.3hz @ 800W

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Im open to other suggestions - but i cant change box dimensions, sub or amp. Just have to make the best with what i currently have.

Thanks!!

Last edited by bouf0010; 01-01-2015 at 08:21 PM. Reason: photo link update
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post #2 of 45 Old 12-28-2014, 08:57 AM
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I'd shoot for 15-17hz as my tune. I had 2 IXL's at one point in giant LLT's at 16hz and it was prefect. They did really well in them. They are great subs. The nice thing about them, is you could always just drop a UXL or similar in the same box as an upgrade at some point as well.
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post #3 of 45 Old 12-30-2014, 08:36 AM - Thread Starter
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Ya im gonna keep playing around with the tuning and see. Is ~100db at 10hz worth having at the expense of spl at 20hz+?

The epx2800 has been returned and the minidsp is up for sale - they didnt seem to cooperate very well due to the low output of the minidsp. Should have done a little research, oh well. The inuke3000dsp is on its way.

Started putting the box together today while the wife and kids were out. Played around with the router a little bit (first timer). Im at the point where I need to build a circle jig - that will be a project for another days.

Here are some pics







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post #4 of 45 Old 12-30-2014, 08:40 AM
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If you plan on building any speakers in the future the Jasper Jig really is a great investment for $40

http://www.amazon.com/Jasper-200J-Ci...rds=jasper+jig
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post #5 of 45 Old 12-30-2014, 08:53 AM
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Myself I couldn't care less about 10hz capability. You will have 10 times the amount of sound at 20hz Then 10. Others crave the Ulf. No right answer just what you want .
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post #6 of 45 Old 12-30-2014, 04:01 PM - Thread Starter
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@Jay1 Thanks for the link - ill definitely keep that in mind if I build speakers down the road. Depending how this project goes it may very well happen. For now ive just made a jig out thin mdf since I need to cut out 21" holes.


@chalugadp

Im kinda leaning towards your thinking - the room the sub is going into is massive (15'×25' with 15' to 25' ceiling and one side is open to the entire rest of the house, upstairs, main and staircase to the basement) so I doubt anything below 15-20hz will be usable unless I had 4 or more subs. Maybe one day when I become a loner movie watching hermit and have no use for a guest bedroom... I do have a pullout couch though...hmmmm lol

Heres a pic of the partially finished jig - just need to drill the holes at the right spot for the circles I need cut.

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post #7 of 45 Old 12-30-2014, 04:45 PM
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I would not definitively say that ULF is pointless, but even those that value it greatly usually say to achieve reference capability 15+ before trying to achieve anything lower.
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post #8 of 45 Old 12-30-2014, 07:01 PM - Thread Starter
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Quote:
Originally Posted by bear123 View Post
I would not definitively say that ULF is pointless, but even those that value it greatly usually say to achieve reference capability 15+ before trying to achieve anything lower.
The best I can do in WINISD is 115db @ 20hz with a ~16.5hz tune. At 15hz it drops to 110db.

Last edited by bouf0010; 12-31-2014 at 07:15 AM.
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post #9 of 45 Old 12-30-2014, 07:14 PM
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you have done a great job with your research. as for tuning, given what you have, ~16hz +/- will probably bring the biggest grin. :-)

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post #10 of 45 Old 12-30-2014, 07:48 PM
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Quote:
Originally Posted by bear123 View Post
I would not definitively say that ULF is pointless, but even those that value it greatly usually say to achieve reference capability 15+ before trying to achieve anything lower.
In my room you don't feel it at all. None. Heard 3 other theater and did nothing for me. It is pointless to me. Notice I said me. I never recommend chasing below 15hz. Its present in less then 5% of content of music/movies/tv.

If someone loves it go for it. I also find the overkill bracing pointless too. Some feel better using 3 times needed. I don't force my views on others... Just give suggestions based on what I like which is what an opinion is.
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post #11 of 45 Old 12-30-2014, 08:08 PM
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not sure how many pipe organs go below 16hz. that number is probably 'the number' for a reason. ;-)

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post #12 of 45 Old 01-01-2015, 04:35 PM - Thread Starter
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Not sure what happened to the pics in the first post - thats what you get when you use a random host I guess.

Circle jig was put to use today




I stopped after 2 and noticed that its a LOT of bracing and wasted space. Plus its not gonna work if I want to do 3x 4" ports instead of the single 6 for the ~16.5hz tuning.

I will still use the ones ive already cut but ill be going to the drawing board for the rest of the bracing and figure out a way to support the 3 ports. Maybe I should of built the martycube

heres an idea for the bracing to support the ports

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Last edited by bouf0010; 01-01-2015 at 05:13 PM.
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post #13 of 45 Old 01-01-2015, 08:01 PM
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Are you going with square ports or round ports? The original images aren't working so I'm not sure what the port plan is

Also, subwoofers make first great router projects :P
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post #14 of 45 Old 01-01-2015, 08:08 PM - Thread Starter
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Originally Posted by hotsho111 View Post
Are you going with square ports or round ports? The original images aren't working so I'm not sure what the port plan is

Also, subwoofers make first great router projects
original images are just winisd stuff.

Im going with rounded ports with side exit to give me a little flexibility when it comes to sub orientation and to eliminate the use of bends - as for the sub im still undecided if im going to have it forward facing or down facing to keep tiny fingers away from it.
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post #15 of 45 Old 01-01-2015, 09:20 PM
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What are you planning on making the ports out of?

On mine I picked up some rubber cushioned loop clamps and made some little 1-1/4x1-1-1/4 squares with threaded inserts and glued them to the side panels then wrapped the loop clamps around the ports and screwed them in to the squares. I made my ports out of abs so the fit on the clamps was spot on.
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post #16 of 45 Old 01-01-2015, 09:42 PM - Thread Starter
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Originally Posted by hotsho111 View Post
What are you planning on making the ports out of?

On mine I picked up some rubber cushioned loop clamps and made some little 1-1/4x1-1-1/4 squares with threaded inserts and glued them to the side panels then wrapped the loop clamps around the ports and screwed them in to the squares. I made my ports out of abs so the fit on the clamps was spot on.
thats an amazing build you have going there! the detail and precision is unreal - this is my first time working with wood and im enjoying it so far, definitely is and will continue to be a learning experience.

4" pvc or abs - a buddy of mine works in hvac and plumbing so whatever hes willing to give me when i see him this weekend lol
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post #17 of 45 Old 01-01-2015, 10:59 PM
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Haha, thanks. It was the first project I'd used a router on (among a whole host of other tools I got for the build) so don't worry if it's your first project (it's only my 4th woodworking project).

That said, if you are going with pvc or abs those clamps should work fine. These are what I was talking about (hopefully avs doesn't eat the link): http://www.mcmaster.com/#rubber-cush...clamps/=vac48r

Don't bother with the Sure-Grip one. I picked up one cause I was curious and it didn't even have the wedge mentioned in the description (although maybe I got shipped the wrong thing).

You can also go with something called a j-hook like this: https://www.plumbersstock.com/produc...FRJcfgodFjgAvA

and if you want to spend a lot of money and get the fanciest option you can go with something like this (I would have loved to but they are so expensive): http://www.clic-original.com/index.c...50&SID=2&DID=1

The nice thing about using abs or pvs is they are standard pipe so there are a lot of off the shelf options for mounting
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post #18 of 45 Old 01-02-2015, 07:40 PM - Thread Starter
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A little off topic but got tired of the ridiculous echo in my room so today I made these. Haven't taken any after measurements but it definitely made an improvement (or at least my brain wants me to think that based on time and money spent haha)

frame is made of 1x4 and its 96"×31.5" filled with left over roxul from my basement reno and wrapped in a very porous fabric in the discount section of fabricland


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post #19 of 45 Old 01-02-2015, 10:57 PM
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Day 5 and you're already getting distracted by side projects?
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post #20 of 45 Old 01-03-2015, 05:53 AM - Thread Starter
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haha some may say I have a.d. OoOoO something shiny!
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post #21 of 45 Old 01-04-2015, 11:48 AM
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Quote:
Originally Posted by bouf0010 View Post
Im kinda leaning towards your thinking - the room the sub is going into is massive (15'×25' with 15' to 25' ceiling and one side is open to the entire rest of the house, upstairs, main and staircase to the basement) so I doubt anything below 15-20hz will be usable unless I had 4 or more subs.
I had one of the IXL easy button builds at 10Hz, roughly the same environment. Anything below 15Hz was too low SPL to hear or feel thanks to concrete floors, everything above that was too low in SPL to hit reference. I was profoundly disappointed.

15Hz tune might have kept me happy, but rather than rebuild the IXL I got into the tapped horns instead just to make things as absolutely mentally draining as possible

I say go for 15-16 if you're just doing one.
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post #22 of 45 Old 01-04-2015, 01:02 PM - Thread Starter
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I had one of the IXL easy button builds at 10Hz, roughly the same environment. Anything below 15Hz was too low SPL to hear or feel thanks to concrete floors, everything above that was too low in SPL to hit reference. I was profoundly disappointed.

15Hz tune might have kept me happy, but rather than rebuild the IXL I got into the tapped horns instead just to make things as absolutely mentally draining as possible

I say go for 15-16 if you're just doing one.
Thanks for the real world info - ill be sticking with ~16hz for sure.

My wife has been talking about getting an ottoman for the living room... Me: "I can definitely build you one! You can even pick whatever fabric you want to wrap it with." Wife: "That will save us lots of money and itll be just the way we want it" Me: "Uhh, ya, save money..."

So ill have a second down firing near field sub in the future lol

Maybe she'll ask for a side table too
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post #23 of 45 Old 01-12-2015, 12:50 PM - Thread Starter
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Made a tiny bit more progress today.

Cut out another brace that will hold the 3 ports.





And the driver showed up! I know this has been repeated by everyone thats bought their first 18" - but damn this thing is huge!! haha



The inuke and all the cables/connectors are in too - I need to kick it into high gear. Id like to have the box built and running by the weekend for testing then do all the finishing the following week. Running a business from home with 2 kids under 4 takes a nasty bite out of free time.
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post #24 of 45 Old 01-12-2015, 01:18 PM
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Get that baby rumbling.
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post #25 of 45 Old 01-12-2015, 01:19 PM
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Quote:
Originally Posted by bouf0010 View Post
Thanks for the real world info - ill be sticking with ~16hz for sure.

My wife has been talking about getting an ottoman for the living room... Me: "I can definitely build you one! You can even pick whatever fabric you want to wrap it with." Wife: "That will save us lots of money and itll be just the way we want it" Me: "Uhh, ya, save money..."

So ill have a second down firing near field sub in the future lol

Maybe she'll ask for a side table too
hahaha! Sales 101!
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post #26 of 45 Old 01-14-2015, 05:32 PM - Thread Starter
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More progress today

Got the rest of the braces and holes cut.

I got a little excited when I went to cut the 18.xx" hole in the box and didnt take into consideration that there was an extra 3/4" sheet on top.... so a little extra cutting and figuring out had to be done. Ill make it work lol

I glued and screwed the bracing together but havent attached it to the box yet.

You'll notice too i had to move the rear brace over 3 inches to leave enough room for the ports.

















Glued and tacked the inner piece for the sub and gonna let it dry till tomorrow.
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post #27 of 45 Old 01-15-2015, 10:20 AM
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Cool thread and thanks for the picks. It's always hard to stop working to take photos but makes for more entertaining but longer build.

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post #28 of 45 Old 01-15-2015, 01:35 PM - Thread Starter
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Cool thread and that's for the picks. It's always hard to stop working to take photos but makes for more entertaining but longer build.
No problem! I tried to do a build thread once when built my watercooled computer but ended up not taking vey many pictures.

There are so many awesome build threads on this forum and a pic or 2 from each one gave me ideas and inspiration so I figured id actually take the time for photos. I could probably explain stuff more but im really learning as I go and to be honest sometimes it feels like I dont know what im doing lol

Anyways! Heres some more pics

The driver unfortunately did not fit due to the rubber ring around it Had to jimmy rig a setup to get the hole cut bigger. As you can see it worked out





And the port holes cut.



Shes getting there! Gonna do more tonight and maybe seal it up tomorrow
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Looking good dude.
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post #30 of 45 Old 01-15-2015, 05:12 PM - Thread Starter
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Im very determined to have this thing running by the weekend - heres some more pics.

I made brackets for the ports so they can just slide into place and get glued. These were cut in about 5 mins - they are for function and no one will be able to see them lol. Im going to take part of @hotsho111 's advice and use a half clamp to secure the port to the inner brace.




Got the bracing glued and tacked into place. Little wanted to get in and quickly decided she wanted out.



Then I caulked the inside of the box juuuust incase.



Gonna let that dry overnight and hopefully glue all the foam inside.
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