My sealed Maelstrom-X build... - AVS Forum
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post #1 of 161 Old 07-22-2008, 07:49 PM - Thread Starter
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I'd like to thank NEO-Dan for his cutsheet and design and Sherv for the motivation to get this project rolling, and anyone else who posts a lot in this section.

Here is the design I used (courtesy of Dan):





I had the worker at Lowes cut the sheet into three sections (the two sides off the end, and then down the middle) to make it easier to handle at home. He made accurate cuts. My dad and I cut the rest with a circular saw and guide.

Today we began the assembly.







The top of the middle brace is a bit fubar, but the other sides are good. The blade on the circular saw was bending a bit.





We countersunk all visible screws and then filled the holes with putty and sanded plenty. I wanted to go for a different color than the usual black and decided on a red wine color.

In the pictures below only the red primer has been applied. One can was enough for about 1 coat. We noticed the putty filled holes don't look perfect, so we're gonna work on those tomorrow before we put anymore primer on.





At first I will power this with my XS900 bridged...until I have put it through its paces. I might just buy another amp for my TC-2000 sub, like a used Ep2500.
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post #2 of 161 Old 07-22-2008, 09:09 PM
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Looking good Will

Regards,
Dan
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post #3 of 161 Old 07-22-2008, 09:16 PM - Thread Starter
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Thanks Dan!
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post #4 of 161 Old 07-22-2008, 09:21 PM
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Looks good! How did you cut out the driver hole?

"Measure twice, then measure again. Only then should you even THINK about cutting."

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post #5 of 161 Old 07-22-2008, 09:24 PM - Thread Starter
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Quote:
Originally Posted by Ezcl View Post

Looks good! How did you cut out the driver hole?

Used my router and a jasper jig. To get the 18.5" cutout for the outer baffle I used the maximum setting on the jig and already had a 1/2" straight bit, so it came out to 18.5" exactly.

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post #6 of 161 Old 07-22-2008, 09:46 PM
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Nice box Will. The fun will start when you fire this baby up!
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post #7 of 161 Old 07-23-2008, 12:21 AM
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Ah, cool. Looks like a quality build, man. Wish I could find a friend with a router. Too bad HD doesn't rent them out. :\\

Good luck with finishing up the painting!

"Measure twice, then measure again. Only then should you even THINK about cutting."

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post #8 of 161 Old 07-23-2008, 05:05 AM
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Is 0.75" MDF thick enough for a Maelstrom-X or would 1" MDF or plywood be a better idea? I just ordered my Maelstrom-X yesterday and I am looking to put it into a sealed box but I was under the impression that 0.75" MDF would just not cut it for a sub as serious as the Maelstrom-X. If NEO-Dan's sealed box will be strong enough than I will build that box. I had envisioned needing 1" thick sides with a 2" front and some more extensive bracing. If that is overkill then that would same me a lot of time and money getting the 1" plywood.
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post #9 of 161 Old 07-23-2008, 05:27 AM
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ABOUT DAMN TIME!

looking good willy! ...so what are you gonna use for EQing on it? are you going to do any L/T for it?
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post #10 of 161 Old 07-23-2008, 07:00 AM - Thread Starter
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Quote:
Originally Posted by Uklit View Post

Nice box Will. The fun will start when you fire this baby up!

No doubt! Can't wait to listen tonight.

Quote:


Ah, cool. Looks like a quality build, man. Wish I could find a friend with a router. Too bad HD doesn't rent them out. :\\

Good luck with finishing up the painting!

Thanks. Mine is just a Skil 1825 combo I got from skilshop refurbished for $65 shipped. It has 1/2" shank, variable speed, a light, and a cheap vacuum accessory that I haven't tried out yet. Down the road I'll probably get a better one and let this one go on craigslist.

Quote:


Is 0.75" MDF thick enough for a Maelstrom-X or would 1" MDF or plywood be a better idea? I just ordered my Maelstrom-X yesterday and I am looking to put it into a sealed box but I was under the impression that 0.75" MDF would just not cut it for a sub as serious as the Maelstrom-X. If NEO-Dan's sealed box will be strong enough than I will build that box. I had envisioned needing 1" thick sides with a 2" front and some more extensive bracing. If that is overkill then that would same me a lot of time and money getting the 1" plywood.

Sherv says it is and he's built 4 of these cabinets. It feels solid enough to me. It is efficient with its use of wood with the two braces and the construction in general. I used titebond and plenty of screws so I feel good about it strength.

Quote:


ABOUT DAMN TIME!

looking good willy! ...so what are you gonna use for EQing on it? are you going to do any L/T for it?



Thanks man. I don't have an EQ device yet but at the top of my list is a DEQ/DCX....and possibly a second Maelstrom down the road.
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post #11 of 161 Old 07-23-2008, 07:08 AM
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Quote:
Originally Posted by crismyrm View Post

Is 0.75" MDF thick enough for a Maelstrom-X or would 1" MDF or plywood be a better idea? I just ordered my Maelstrom-X yesterday and I am looking to put it into a sealed box but I was under the impression that 0.75" MDF would just not cut it for a sub as serious as the Maelstrom-X. If NEO-Dan's sealed box will be strong enough than I will build that box. I had envisioned needing 1" thick sides with a 2" front and some more extensive bracing. If that is overkill then that would same me a lot of time and money getting the 1" plywood.



If it's properly braced and the baffled is doubled up there should be no problems.

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post #12 of 161 Old 07-23-2008, 08:43 AM
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Are those shoes steel toed Gotta love DIY work gear My wife always asked me why the heck do I where sandels when working with wood

beautiful build!! Im really regretting not buying a couple of Mal-x on July 4th weekend!!

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post #13 of 161 Old 07-23-2008, 09:24 AM - Thread Starter
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Quote:
Originally Posted by penngray View Post

Are those shoes steel toed Gotta love DIY work gear My wife always asked me why the heck do I where sandals when working with wood

beautiful build!! Im really regretting not buying a couple of Mal-x on July 4th weekend!!

I just wear some old new balances during most of the woodworking. I did wear some sandals during the sanding/priming though. Its warm down here.

Thanks, and you def should enjoy the Maelstroms.
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post #14 of 161 Old 07-23-2008, 10:52 AM
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Love the look of the red so far. Can't wait to see the finished product...and hear your impressions.

Need to get a free weekend so that I can get my 2 Maelstroms out of their cardboard boxes and into some proper MDF boxes!
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post #15 of 161 Old 07-23-2008, 10:59 AM
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No magnet braces?

YID DIY
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post #16 of 161 Old 07-23-2008, 11:05 AM - Thread Starter
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Quote:


Love the look of the red so far. Can't wait to see the finished product...and hear your impressions.

I really wanted a Midnight Blue type of color, but Lowes/HD don't have a wide selection of spray paints. Down the road I'll just go with custom paint and a HVLP system. The red was my secondary choice but I think it will look nice (for paint anyway).

We got some auto body filler to work on the 'problem' areas and another can of primer and paint. Should have the whole thing finished tonight...just need to finish this prep work then put on ~3 coats of paint. I am not going to rush with the paint though. I want it to dry well before I start messing with the cabinet.

Meanwhile, here are 2 pics of the Dayton premium binding posts and plate that I picked up for this project.



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post #17 of 161 Old 07-23-2008, 11:05 AM - Thread Starter
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No magnet braces?

Nope.
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post #18 of 161 Old 07-23-2008, 01:16 PM
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Magnet braces...LOL The magnet must be fully supported by the basket. No need for any magnet braces...not like the 50000 metric T weight will cause the voice coil in the gap to shift.

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 #19 of 161 Old 07-23-2008, 02:11 PM
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Nice looking design and execution. I appreciate the utilitarianism and simplicity.
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post #20 of 161 Old 07-23-2008, 07:04 PM - Thread Starter
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All done!







That 27" CRT is soon to be replaced by a 96"-100" projection screen. That is the next project (already have the Mitsu HC1500).
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post #21 of 161 Old 07-23-2008, 07:17 PM - Thread Starter
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Just realized (and forgot) I am gonna need another RCA-XLR adapter since I'll be running both subs off the amp for a while.
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post #22 of 161 Old 07-23-2008, 07:31 PM
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Are the left/ right on the wrong sides?

Lot's of low rent stuff stacked up into a medium rent pile.
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post #23 of 161 Old 07-23-2008, 07:35 PM - Thread Starter
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Are the left/ right on the wrong sides?

I actually need to check with some other ZDT3 users or Zaph on that. I originally had them the other way around but in some of his pics I saw otherwise.
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post #24 of 161 Old 07-23-2008, 07:36 PM
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Will, that burgundy looks nice! I think it fits in with the mains better than would a dark blue.

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Magnet braces...LOL The magnet must be fully supported by the basket. No need for any magnet braces...not like the 50000 metric T weight will cause the voice coil in the gap to shift.

Every little bit helps. Plus you can couple the motor to the brace and the brace to the rear wall, disipating vibrations to all walls. I should post pictures of my SDX sealed build...even though I've not done any finishing work on it, it's just nude plywood.

YID DIY
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post #25 of 161 Old 07-23-2008, 07:37 PM
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gaddam! that was quick....and beautifully executed!

that red finish really accents your room! Now build the second one, add some good power, a deq2496, and you will be in pretty nice shape my friend!
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post #26 of 161 Old 07-23-2008, 07:38 PM
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Will, that a beautiful and simple build. Very well done and I do like that Red color too!


any measurements or initial impressions?

btw, I love my little sealed sub too. I actually turn off my twin ported subs when listening to music.

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post #27 of 161 Old 07-23-2008, 07:42 PM - Thread Starter
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BTW, to mount the driver I used the two pieces of wire through four mounting holes technique. It worked really well. That is how I will do it in the future.

Quote:


Will, that burgundy looks nice! I think it fits in with the mains better than would a dark blue.

Thanks Looney! You're right. It matches the room better in general.

Quote:


gaddam! that was quick....and beautifully executed!

Didn't seem so quick. Thanks Sherv.

Quote:


that red finish really accents your room! Now build the second one, add some good power, a deq2496, and you will be in pretty nice shape my friend!

Indeed. That is a likely scenario....we'll see.

Quote:


any measurements or initial impressions?

I took some quick measurements with REW. It rolls off slowly until 20Hz, then falls quickly, but even my TC2K doesn't extend much more than that. I suppose after it breaks in it'll look even better on the low end. In its current placement I have a bad dip in the 65-75Hz area. But I feel that the extension is enough for music.

So far, sounds great. Blends in well. I have to hit the sack soon (get up at 6AM). Can't wait to get the TV/stand and equipment rack out of here so I have more flexibility with placement.
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post #28 of 161 Old 07-23-2008, 07:46 PM
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buy another Mal-x, I will buy your TC2K

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post #29 of 161 Old 07-23-2008, 07:53 PM - Thread Starter
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buy another Mal-x, I will buy your TC2K

Do you really need mine?
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post #30 of 161 Old 07-23-2008, 07:59 PM
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lol, do not really need it but I have two TC2Ks ported, one Sealed so another sealed one would be cool

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