8 foot long sub with (4) 18" Obsidian/SI drivers build - Page 2 - AVS Forum | Home Theater Discussions And Reviews
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post #31 of 49 Old 12-07-2013, 06:57 AM
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I smile at this, seeing for magnets each of us use some method to mark the magnet polarity upon construction.
Very beautiful work, love the top.
Now I'm building a 4 cu ft ported box for my family room, it will go next to the couch, you've inspired me to think of a finish top instead of just MDF painted top.
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Here are the photos of how the magnets were attached to the frame and box

I used a CA glue to attach the magnet to the aluminum frame
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post #32 of 49 Old 12-07-2013, 09:35 AM - Thread Starter
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Originally Posted by Fabricator View Post

that is a pretty sweet sub, dude. my 2 subs are to each side. but i want larger ones, that may not fit well. the other option is to do like you did.

what i have to ask = i see the opening for the port. but didn't see anything inside the box for a port. just wondering.

The port goes straight back towards the back of the box. I think the port is about 16" deep if I remember right.

I'm not talking about the kind of speakers you just listen to, I'm talking about the kind of sound you can feel.
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post #33 of 49 Old 12-07-2013, 09:41 AM - Thread Starter
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Quote:
Originally Posted by mtbdudex View Post

I smile at this, seeing for magnets each of us use some method to mark the magnet polarity upon construction.
Very beautiful work, love the top.
Now I'm building a 4 cu ft ported box for my family room, it will go next to the couch, you've inspired me to think of a finish top instead of just MDF painted top.

Yes, the little neo magnets are naturally very strong and with the CA glue I had only the small time window of 7 seconds or so of working time.
and I did mark the magnets for polarity, neo is very unforgiving and slams together so quickly.

Thanks for the compliments, you should consider the time it takes for finishing a MDF top versus doing nothing but putting some Watsco oil on it like I did. The biggest difference is in the outcome. I've gotten nothing but compliments so far. I'm very happy with the decision to go this route and it has a very good WAF too.

I'm not talking about the kind of speakers you just listen to, I'm talking about the kind of sound you can feel.
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post #34 of 49 Old 02-14-2014, 01:21 PM - Thread Starter
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Finally did a response plot for my room today. I already knew that the room has a bump between 50-65hz when I've done these tests on my other previous subs, but I was happy to see that my -3db drop was at 16hz. The initial 20hz tuning frequency turned out to be a good design with the normal room gain added put me right where I wanted to be. I do listen to some pipe organ recordings with 16hz notes and they are quite nice already. The 6k watt Behringer iNuke amp is on its way, as now I'm clipping my 3K watt amp when I have the volume maxed out on the preamp.

Obsidian18woofersresponseplot_zpsdeddff65.jpg

Now I need to remove the Obsidian drivers this weekend and install some Stereo Integrity HT drivers in their place. I'll keep them in there until I find a buyer for this thing, so that I can make room for the next sub that will surpass this one in performance.

I'm not talking about the kind of speakers you just listen to, I'm talking about the kind of sound you can feel.
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post #35 of 49 Old 02-14-2014, 01:37 PM
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I must have missed this thread last year, but hats off for a great looking build.
I have a workmate building a theatre at the moment and your sub would integrate perfectly into his room, so I've sent him a link and I think he'll be interested in copying the concept.

“You are not special. You are not a beautiful and unique snowflake.” Chuck Palahniuk
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post #36 of 49 Old 02-14-2014, 04:46 PM
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looks fantastic. great job.
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post #37 of 49 Old 02-18-2014, 10:02 PM - Thread Starter
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The Obsidian subs are gone, so the new SI HT subs will be put in sometime this week and I'll post up another response curve of them too. It should be at least equal to the one above.

The new 6000 iNuke amp came in today too.smile.gif
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I'm not talking about the kind of speakers you just listen to, I'm talking about the kind of sound you can feel.
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post #38 of 49 Old 10-23-2014, 05:05 AM - Thread Starter
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I didn't post up after I installed the SI 18" subs in the cabinet, but the Obsidian drivers were very close to the performance of the SI subs. Again, I've not gotten the drivers with the iNuke 6000 to move more than 3/4" excursion. Bass quality is still excellent as with all the SI drivers. Tight, accurate, percussive.
I sold my house and now have the sub at work positioned behind me in my work area and have it jamming every day with very large amounts of pant leg flapping bass. They hear it at the other end of the building ( a warehouse the size of a Wal-Mart), but I'm anxious to put it back in a normal size room and have it pound me silly.
With the new iNuke 6000, I'm not running out of power now.

I'm not talking about the kind of speakers you just listen to, I'm talking about the kind of sound you can feel.

Last edited by 16hz lover; 10-23-2014 at 05:22 AM.
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post #39 of 49 Old 03-01-2016, 09:07 PM
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Beautiful build. I feel bad you have to sell it, but if I can do anything to help, like bringing it back to the top of the DIY forum build threads, just let me know.

To bring it to the attention of so many more people that would be fortunate to have such a WAF friendly build, with such an artistic touch, that it just screams for more people to be exposed, just makes me feel fortunate to help, in any way I can.

https://www.avsforum.com/forum/209-au...8-drivers.html

Again, I feel humbled by hearing about the terrible health issues that force you to offer this fine piece of artistry for sale, and truly offer my best wishes and prayers toward your speedy recovery. If there's anything else I can do to help, don't hesitate to ask.

God Bless,

Joseph

mods, can we have a 'dislike' button ?
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post #40 of 49 Old 03-02-2016, 04:45 AM - Thread Starter
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Thanks Joseph

I'm not talking about the kind of speakers you just listen to, I'm talking about the kind of sound you can feel.

Last edited by 16hz lover; 03-03-2016 at 04:44 AM.
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post #41 of 49 Old 07-21-2017, 11:29 AM
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Awesome project, too bad photobucket ruined all the pictures for the build. Playing with an idea to build the same but twice as small.
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post #42 of 49 Old 07-21-2017, 11:48 AM
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Photobucket made a major dent in the forum history of the internet.

Every forum I visit is now littered with that stupid image.
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post #43 of 49 Old 07-21-2017, 01:24 PM - Thread Starter
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Yes ! PhotoSuckIt ruined a lot, but provided the public with a huge service for years. I won't ever go back there, but will be interested to see if they survive long term.
I won't be replacing the pictures, just too much trouble.

I'm not talking about the kind of speakers you just listen to, I'm talking about the kind of sound you can feel.
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post #44 of 49 Old 07-21-2017, 02:13 PM
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Quote:
Originally Posted by 16hz lover View Post
Yes ! PhotoSuckIt ruined a lot, but provided the public with a huge service for years. I won't ever go back there, but will be interested to see if they survive long term.
I won't be replacing the pictures, just too much trouble.

it was a nice build.


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Listen. It's All Good.
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post #45 of 49 Old 07-21-2017, 02:17 PM
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thank you google. :-)
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Listen. It's All Good.
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post #46 of 49 Old 07-21-2017, 02:24 PM
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And it's now mine, mine, mine!!

Thanks to 16Hz lover!!

Don

JVC RS400, Marantz SR7010, Screen Innovations 160" 2.35:1 Screen
Front L/R: Duntech Sovereigns, powered by 2 bridged Adcom GFA-555
Center: Revel C208 powered by Cambridge Audio Azur 851W
Dolby Bed (4): Sony Core SS-CS5, Atmos (4): Ascend Acoustics CBM-170 SE
Subwoofer: DIY 8' sub with 4 18" SI Drivers, powered by iNuke 6000
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post #47 of 49 Old 07-21-2017, 04:05 PM
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Like a boss

Sent from my SM-N910V using Tapatalk
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post #48 of 49 Old 07-21-2017, 08:42 PM - Thread Starter
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Thanks for retrieving the images for us.

Don is no doubt enjoying it, but he won't let me near the gain controls when I come over for demo's

I'm not talking about the kind of speakers you just listen to, I'm talking about the kind of sound you can feel.
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post #49 of 49 Old 07-21-2017, 08:56 PM - Thread Starter
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Quote:
Originally Posted by olegg View Post
Awesome project, too bad photobucket ruined all the pictures for the build. Playing with an idea to build the same but twice as small.
That is very easily done since it is 2 separate cabinets and a 4ft. long cabinet is easily placed, better WAF.

I'm not talking about the kind of speakers you just listen to, I'm talking about the kind of sound you can feel.
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