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My sealed Maelstrom-X build... - Page 4

post #91 of 161
"4th order Linkwitz Reilly is kind of a generic standard for speaker to sub crossovers."

I believe it's usually 24 dB LP on the sub and 12 dB/oct HP on the sats on the assumption that they have an acoustic rolloff of 12 dB/oct, for 24 total to match the sub.
post #92 of 161
Quote:
Originally Posted by SteveCallas View Post

4th order Linkwitz Reilly is kind of a generic standard for speaker to sub crossovers. I could be wrong, but I don't believe there is anything in the Dolby spec stating it has to be.

NO.

most speakers/sub crossovers are LowPass at 24dB/octave and 12-24dB/Octave highpass on the mains/satellites.
post #93 of 161
Quote:
Originally Posted by Ezcl View Post

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!

Routers are like $59....
post #94 of 161
For kicks, Last night I created a filter set in 1/6 oct increments that negated (-48 db) all frequencies above 67hz emulating a crossover on my BFD. I couldn't believe how much nicer the sub sounded. As the sub was no longer trying to produce the upper-low bass (67 - 80hz) It gave it alot more bandwidth down low.

Crossover FTW..
post #95 of 161
Thread Starter 
Quote:
Originally Posted by Jinjuku View Post

Routers are like $59....

yep. Used a $60 refurb Skil for mine.
post #96 of 161
Thanks, Willd, for posting this build thread. As you can see, I took it as inspiration to get going with my Maelstrom. Thanks to Neo-Dan as well for the cut sheet. Can't wait to get it wrapped up and have a listen.

post #97 of 161
awesome TV!
post #98 of 161
Quote:
Originally Posted by amik View Post


The GedLee Nathan 10 baffles in the background are much more interesting than this (or any) subwoofer, though.
post #99 of 161
I think Nathan 10's are in my future as well. My Maelstrom-X pair are up font and integrate and sound good with the x-over up around 160Hz, giving massive impact & punch
post #100 of 161
Thread Starter 
Quote:
Originally Posted by KyleLee View Post

awesome TV!



I have a new 720p projector waiting to be set up. This TV has done its best though.
post #101 of 161
Quote:
Originally Posted by DS-21 View Post

The GedLee Nathan 10 baffles in the background are much more interesting than this (or any) subwoofer, though.

Just waiting on the final crossover design and upgraded parts from Dr. Geddes and they'll start going together. Can't wait.
post #102 of 161
Quote:
Routers are like $59....

LOL, ha ha Well.. lets not mention clamps then

Hey Willd! Great build! I meant to step in and tell you a long time ago, but sort of left the Forums for awhile. Anyway great looking sub. I'm a little surprised you decided to build a sealed, but glad you did. If you lived close by, I would lend you my BASSIS. Seems like your really enjoying it though. Nice job man, I really like the color also, very attractive.
post #103 of 161
Agreed, nice build, and thanks for taking the time to document it....

I now have 2 of these on the way, with QSC 2502's for each, I'm dam excited...
I might just have to build sealed for TC-2000's as well to see what they have to offer in comparison.... heheh or maybe in addition to the Maelstrom....

Quote:
Originally Posted by Willd View Post

Better upper frequency response FTW. The difference in this area between the Maelstrom and the TC-2000 really shows not just with music, but with movies. All of these effects sound so great now. Its not really a low bass thing...

Also, I've found I can now watch movies at a lower volume and everything sounds clearer. Like the lower frequencies of some voice was being lost...and its there now...if that makes any sense.

I also noticed a great deal more emphasis and clarity going from my SVS ported to a JL F112 in the upper bass region...
post #104 of 161
Thread Starter 
Quote:
Originally Posted by steve nn View Post

LOL, ha ha Well.. lets not mention clamps then

Hey Willd! Great build! I meant to step in and tell you a long time ago, but sort of left the Forums for awhile. Anyway great looking sub. I'm a little surprised you decided to build a sealed, but glad you did. If you lived close by, I would lend you my BASSIS. Seems like your really enjoying it though. Nice job man, I really like the color also, very attractive.

Hey Steve, thanks! Yeah, I surprised a few people. Doesn't mean I've dropped vented for the rest of my days or anything. I still appreciate both alignments and what they offer. A bassis would be nice to try out for sure. If I had the spare funds, I'd get some EQ. I am very happy with it though.

Quote:


Agreed, nice build, and thanks for taking the time to document it....

I now have 2 of these on the way, with QSC 2502's for each, I'm dam excited...
I might just have to build sealed for TC-2000's as well to see what they have to offer in comparison.... heheh or maybe in addition to the Maelstrom....

Thanks and no problem. That'll be a great setup!

On that note, I am considering selling my 15" TC-2000 SVC now since money is tight. It is still in my 320liter LLT enclosure but I'd sell the driver by itself if anyone is interested or you guys know anyone who is interested. It has the tall roll surround and is in very good condition.
post #105 of 161
Quote:
I still appreciate both alignments and what they offer.

I hear that. It's easy to appreciate both alignments when done properly.. you have done just that imo. Dang, it would be nice to snag that driver from you though. I just picked up a couple PC13-Ultra's and still have a SDX just sitting collecting dust! The TC-2000 would be nice to have none the same. Ah! Anyway, it's nice to see you built another sub and am very happy with it.
post #106 of 161
Pm Sent...
post #107 of 161
Thanks to Kevin, Will, and Dan I will be building this same project. I would like to get all the supplies in stock so when the sub finally arrives I can put it together pretty quickly and not have to wait for anything to show up.

I have a couple of questions to help solidify the purchases I still need to make:

1) What size Hurrican Nuts does the Malestrom require?
2) Does the sub come with fasteners already?
3) I already have a pair of these binding posts, will they work for a sealed config?
http://www.madisound.com/catalog/pro...roducts_id=151
4) Without the driver, the internal volume of the enclosure is about 6.24 cubic feet, how much volume does the driver use and does it matter what type of polyfill I use, where do you guys typically buy from?
5) Do I need to put some sort of sealer/gasket around the driver?
http://www.parts-express.com/pe/show...number=260-540
6) I think finally, does the performance differ if I mount the driver to the face of the box or flush it up?

Most of this stuff I would figure out once I began building and testing but I would like to get it setup as soon as possible so your help would be very appreciated.

Thanks,
Nate

Oh, and on a side note, GO TECH!!!
post #108 of 161
Nate, these are what I just ordered, for the Maelstroms in conjunction with the TC2K's

1 081-1084 1/4"-20 Hurricane Nuts 50 Pcs.
2 329-045 Magnetic Grill Guides .395" Dia. x 0.2" H 8 Pcs.
1 260-542 Speaker Gasketing Tape 1/8" x 1/2" x 50 ft. Roll
4 091-602 Dayton SBPP-BK Binding Post Plate Black Anodized
4 091-624 Dayton BPP-SN Premium Binding Post Pair Satin Nickel

I did not buy the cap screws yet....

I think that with the strength of the motor, you may experience some flex on the baffle, may want to reinforce it..... The Cut sheet is pretty clear, I'm actually doubling up the brace, to drop the span to less then 8"

I still want to get a look at Nuances Songtower grill to see how I want to do it... I have access to various plastics if they serve my purpose better.
Here is my progress so far, this box is for the TC2K though.


http://i34.photobucket.com/albums/d1...ers/photo4.jpg
http://i34.photobucket.com/albums/d1...ers/photo3.jpg
post #109 of 161
The largest bolt / T-nut you can use is a 10/32. 1/4" is a no-go through a TC 1000, 2000, 3000, and 5400.
post #110 of 161
Thanks for the heads up michael... I'll pick something else up for the 2k's...
post #111 of 161
If you're looking for some extra long Socket Caps, check out MicroFastners.

http://www.microfasteners.com/catalo...cts/SSCSCA.cfm

I got my 2" long 1/4-20's here. Cheap price, cheap shipping and good quality.
post #112 of 161
Here is a graph* of the sealed Mal provided by Will:



http://s27.photobucket.com/albums/c1...t=13smooth.jpg

*1/3rd octave smoothing applied.
post #113 of 161
Thread Starter 
Ya have to use the "[IMG][/IMG]" function.
post #114 of 161
Quote:
Originally Posted by Willd View Post

Ya have to use the "[IMG][/IMG]" function.

Apparently I don't know how to work it, but the guy who wanted to take a look already got it.
post #115 of 161
Thread Starter 
post #116 of 161
Can anybody provide more info about how this data was collected? i.e. room size, power, etc
post #117 of 161
Quote:
Originally Posted by Swampfox View Post

Can anybody provide more info about how this data was collected? i.e. room size, power, etc


Will of course can answer this best, but here is what I've heard from him:
3000^3 room
powered with XS900
placed along front wall
post #118 of 161
Quote:
Originally Posted by NateTTU View Post

Will of course can answer this best, but here is what I've heard from him:
3000^3 room
powered with XS900
placed along front wall

Let me guess . . . the room is ~17 x 23
post #119 of 161
Quote:
Originally Posted by Willd View Post


Can you tighten the Y axis?
post #120 of 161
Thread Starter 
Quote:
Originally Posted by Swampfox View Post

Let me guess . . . the room is ~17 x 23

Its a 14 x 30 room, or thereabouts. Sub was along the sidewall. Mic was placed about mid-way from the front speakers and the listening position, 1m off the floor.

Used Analog RS meter on tripod, with corrections applied. Taken using a MacBook pro and REW.
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