Finished My Ed 18 inch sono's - AVS Forum
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post #1 of 672 Old 04-07-2008, 09:52 PM - Thread Starter
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Hey Guys,

I finally finished my first DIY project. I built 4 (Ed 18 inch drivers) 24 inch round and 6 feet tall sono's. I learned first hand the good and the not so good. The sono's actually came out different sizes and one of the ports were bigger than the others. You would think and 8 inch port was 8 inches but no, they were 7.5 inches(3 of them) and the other 8.5 inches. Anyway I recessed the end caps so they were all very close in size(within an inch). I made these as simple as possible. I did not finish them because they were going behind a screen. 3 of them actually were tuned to 14.1 hz and the one with the bigger port came out to be 16 hz. Not bad. I took some pics of the finished product(can I submit these for the ugliest subwoofers). I put one in the front right corner and calibrated it to 75 db's. I wanted to keep adding to see how much gain I would get from adding 3 more. I put the next one in the other front corner and it read 81 db's(6 db's increase). I then added 1 more, 83-84 db's, and then finally the last and I was at 87 db's. I was very happy because they all worked, and with the maximum gain. What does all this translate to. HOLY S........ I have owned Klipsch THX ultra 2 subs, M&K MX-5000THX subs, SVS dual 16-46cs+ subs, SVS plus/2 sub, and I just sold 4 pro subs with 6 18's total. These will eat up and spit out any of them(except the horns at the 60-80hz range). To give an idea my pro subs were very effecient and I had them set for 120-122 db's of bass. I had to turn down these subs 10 db's to reach the same level. The bass is awesome. Clean, clean, and very powerful. My hair would stand up a little but now it feels like someone is combing your hair. Here are some pics:
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post #2 of 672 Old 04-07-2008, 09:53 PM - Thread Starter
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post #3 of 672 Old 04-07-2008, 09:55 PM - Thread Starter
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Here is my friend who did most of the building, he is 6 feet 4 inches tall for scale


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post #4 of 672 Old 04-07-2008, 09:57 PM - Thread Starter
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Here they are next to my JTR triple 8's


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post #5 of 672 Old 04-07-2008, 09:59 PM - Thread Starter
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From the other side


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post #6 of 672 Old 04-07-2008, 10:00 PM - Thread Starter
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My Ada amps powering everything


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post #7 of 672 Old 04-07-2008, 10:01 PM - Thread Starter
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Behind my 140 inch screen, no one will know what hit them.


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post #8 of 672 Old 04-07-2008, 10:02 PM
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Wow... pretty impressive setup you have there, looks great!

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post #9 of 672 Old 04-07-2008, 10:03 PM - Thread Starter
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That's me( I am 6'3" for scale.

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post #10 of 672 Old 04-07-2008, 10:04 PM - Thread Starter
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First test, I have a shaker in each chair and I could not tell they were on anymore


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post #11 of 672 Old 04-07-2008, 10:06 PM - Thread Starter
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The chairs, those are the back channel slanted 8's(JTR)

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post #12 of 672 Old 04-07-2008, 10:14 PM - Thread Starter
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Quote:
Originally Posted by IceBadger View Post

Wow... pretty impressive setup you have there, looks great!

Thanks, I designed the room as well but I can't build for crap, there are some touch ups that need to be done but just about finished.
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post #13 of 672 Old 04-07-2008, 10:21 PM - Thread Starter
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Here is a better picture of the rack.


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post #14 of 672 Old 04-07-2008, 10:26 PM
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Awesome in-wall rack!! That looks like some nice amplfiers there. I bet that place rocks loud and hard. I see you like a little guitar hero. With a 140" you have no excuse to miss notes.

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post #15 of 672 Old 04-07-2008, 10:31 PM - Thread Starter
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I don't play it that much, I watch movies most of the time. The same guy built the rack for me, he has never done anything like this before either. It is in the back left corner and from the front seats you don't see it. Those are Ada's MPA-501's with their matching 2 channel. The Mpa-501's have their own separate power supply, the top and bottom of the 5 channels.
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post #16 of 672 Old 04-07-2008, 10:44 PM
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Thats a beautiful theater, you and your friend should be very proud! I am sure those ED's hit EXTREMELY hard, its like you have a pair of upgraded A7-900's in there, the amount of low end gain you have over the A7-900's is astounding.
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post #17 of 672 Old 04-08-2008, 02:49 AM
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Very nice!
With a lot of people doing multiple 18's in different setups, it's cool to see a multi-sonotube setup. I feel sorry for your houses foundation
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post #18 of 672 Old 04-08-2008, 06:16 AM - Thread Starter
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Thanks guys, Ed Mullen from SVS actually convinced me of a DIY project. I actually modeled these like a single a7-450. I get about 1 db more of output with 1 of these and they are tuned 3 hz lower. It is like having 4 A7-450's tuned to 14 hz rather than 17 hz but not lose any spl. I had these turned up too loud at first and during the opeing scene of transformers(helicopter) my theater doors were rattling so much(time to upgrade the doors).
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post #19 of 672 Old 04-08-2008, 06:51 AM
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Great work ! I like the setup,front placement of subs...works great in many rooms.

Congrats on a job well done.

Ask yourself mortal , do you have as much displacement as me ? The answer is no unless you have a Windmere fan sub.
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post #20 of 672 Old 04-08-2008, 06:58 AM - Thread Starter
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Did some testing and these are the best sounding subs I have owned(To my ears). They just are so visceral and deep at the same time. I have never heard a sub with such a deep tone to them. I have to run some old reference dvd's to hear the difference. Compared to my pro subs which hit very hard(123-125db's) I have already hit 122 db's but that 122 db's seems so much more visceral. Everything shakes so much more(a good thing).

On a side note placement is huge. When I was hooking them up I had 2 of them next to each other with one in front of the other and they were cancelling each other out, I lost about 3 db's as compared to 1. That is when I stopped and just placed them in their final resting position.

My other question is How can I get the max gain when they are not colocated? Is it because they are so big? When I tested the 2 corner subs I did get a 6 db's in gain.
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post #21 of 672 Old 04-08-2008, 07:06 AM - Thread Starter
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Quote:
Originally Posted by TheEAR View Post

Great work ! I like the setup,front placement of subs...works great in many rooms.

Congrats on a job well done.

Thanks. My room is only 2300 cubic feet but on a concrete floor so from the seats very hard to get loud. In contrast if I ran just 2 of these in the back corners I would be at 130 db's. That front placement is not the best for spl but the sound wave coming at you is just incredible. That is why I have 4 up there.
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post #22 of 672 Old 04-08-2008, 07:08 AM
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Sorry I missed getting back to you on Saturday...stupid pile of QC'ing. Glad you got it figured out though. They look...well...painful

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post #23 of 672 Old 04-08-2008, 07:27 AM
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INSANE...

Im glad to see you got it done, and went with 4.

Each speaker is seeing around 600 watts correct?
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post #24 of 672 Old 04-08-2008, 07:36 AM - Thread Starter
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Yes, 600 watts per sub. I did not finish them because as you can see they are hidden.
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post #25 of 672 Old 04-08-2008, 07:59 AM
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Well DOne MK....well done!

now, download REW, get a laptop and a sound card, plus Behringer Mic, and get some measurements on those things asap!


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post #26 of 672 Old 04-08-2008, 08:46 AM
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Absolutely.. I'd love to see the room response plot. Are you using any EQ on them?

Did you remove the growlers?

Looks like good fun!
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post #27 of 672 Old 04-08-2008, 10:32 AM
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Wow! Awesome setup you there, MK. How are you liking the ED subs?

Build question: How much internal volume are in those sonos?


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post #28 of 672 Old 04-08-2008, 11:43 AM - Thread Starter
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I will test some more later. I do most of this typing at work. I have been looking into eq and rew. I had an Eq(behringer 1120) and it made a difference(the pro subs were too powerful from 50-80) but then I just missed that punch. I can always buy a soundcard and hook it up without eq to see what I am getting. Does radio shack carry anything?
It's amazing how these can pass WAF when you put a black curtain and screen in front of them. Do these qualify to be entered in the ugliest subwoofer contest? I mean, I still have the labels on them.

Hi Scott,

They ended up being 439 liters tuned to 14.1 hz. The one in the front right corner actually had a bigger port which made it 432 liters at 16 hz. They all blend very well. I purposely went with 4 so I did not have to get a more powerful amp to run 2. I wanted to get insane levels without any of the amps or drivers working too hard.

It took us about 7 hours to build and setup with the screen in place and everything. Total cost was $250 per sub. I paid my friend so it bimped it up to about $325/per sub. If I add my amp I am at $500 per sub with labor. If I put one of these in one of the back corners I would be at 120 db's at the front seats and more at the rear.
You guys have me convinced now about DIY. I have no size constraints to think about. These are just plain awesome. I did not think it would get much better but.......
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post #29 of 672 Old 04-09-2008, 01:59 AM
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Oh nice, glad "DIY" worked out for you.

After all the people who build "pro" subs are just people.... Oh well, enjoy!
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post #30 of 672 Old 04-09-2008, 07:55 AM - Thread Starter
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Quote:
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Oh nice, glad "DIY" worked out for you.

After all the people who build "pro" subs are just people.... Oh well, enjoy!

I agree, but can you see someone like Mark Seaton having no restrictions whatsoever.
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