18" Easy Button End Tables 24" x 21" x 36" hwd - AVS Forum
Forum Jump: 
Reply
 
Thread Tools
post #1 of 286 Old 04-11-2008, 05:35 AM - Thread Starter
AVS Special Member
 
NEO Dan's Avatar
 
Join Date: Jul 2006
Location: North East Ohio
Posts: 2,978
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 11
This year looks to be the year of the 18" driver
This will be my construction and documentation thread

This will work with anything from a Dayton Classic 18" with a 240 watt plate amp up to the Exodus Audio Maelstrom-X on 3KW. The RSS390HF-4 and the BASH 300 look good. I'm personally thinking the eD 19Ov.2 on a EP2500 will be used in my build.

Every version should include some form of subsonic filter at ~10Hz, the PE and BASH plate amps are easiest, I can calculate the resistor values and post them. Once I get the EP2500 I plan on figuring out how to mod the filters, I will share that info

Proposed build:
24" x 21" x 36" hwd
Internal volume just over 6'³ @ ~10Hz, port area > 6" id.
The experiment is to get the low tune and useable response into the single digits while cheating the port resonance



This set of cut sheets is for a two cabinet build. You will need 4 sheets of 3/4" MDF

You need to make two #1, one #2, and one #3.





Regards,
Dan
NEO Dan is offline  
Sponsored Links
Advertisement
 
post #2 of 286 Old 04-11-2008, 05:35 AM - Thread Starter
AVS Special Member
 
NEO Dan's Avatar
 
Join Date: Jul 2006
Location: North East Ohio
Posts: 2,978
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 11
UPDATE:
I have come up with a slightly larger design that features larger ports with an aggregate area >8"Id. The volume is also up around 6.375'³ the tuning should come in around 12Hz.
You will need a 1.25" round-over for the port bends and opening, it's available at MLCS.
Don't forget the 4-$2.50 pillows from Wal-Mart
The Shiva-X on a filter modded(easy to do) PE BASH 500 would be provide amazing deep bass response in this box.







Here is a 6'³ sealed vs old vs new comparison:

Raw response, no SSF or room gain added.
As you can see there is ~2dB more output on the low end vs the old design.
The response with the Maelstrom-X will still tend to be a bit lean in most rooms, but it has all the usable extension and articulation you could ever hope for. The system group delay factor (Sum of (GDxHz) is below 250 down to 15Hz.

Regards,
Dan
NEO Dan is offline  
post #3 of 286 Old 04-11-2008, 05:36 AM - Thread Starter
AVS Special Member
 
NEO Dan's Avatar
 
Join Date: Jul 2006
Location: North East Ohio
Posts: 2,978
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 11
Construction Section:

Just got back from HomeDepot




You will need a roundover bit 1.5" or 1.25" will work
MLCS has them @ $46 for the 1.5" #8658 or 39$ for the 1.25" #8659


Regards,
Dan
NEO Dan is offline  
post #4 of 286 Old 04-12-2008, 04:42 PM - Thread Starter
AVS Special Member
 
NEO Dan's Avatar
 
Join Date: Jul 2006
Location: North East Ohio
Posts: 2,978
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 11
Here are the Cut sheets for the single cab build:



Regards,
Dan
NEO Dan is offline  
post #5 of 286 Old 04-12-2008, 05:07 PM
AVS Special Member
 
tundrSQ's Avatar
 
Join Date: Nov 2006
Location: Vermont
Posts: 2,217
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 12
Great thread, anyway to get the cut list down to 3 sheets?

Tim
tundrSQ is offline  
post #6 of 286 Old 04-12-2008, 07:20 PM - Thread Starter
AVS Special Member
 
NEO Dan's Avatar
 
Join Date: Jul 2006
Location: North East Ohio
Posts: 2,978
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 11
tundrSQ,
I do have a smaller version for 15" divers that is 3 sheets for 2 boxes.

But for this you could use 2 handi panels instead of the 4th sheet, to save some money. I just noticed Friday when I bought MDF the pricing for 4 handi panels is almost exactly the same as a regular 49" x 97" sheet.


Regards,
Dan
NEO Dan is offline  
post #7 of 286 Old 04-12-2008, 07:44 PM
Member
 
JaxLax's Avatar
 
Join Date: Jan 2007
Location: Jacksonville
Posts: 30
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
you have 6 braces (the long ones that create the port) in the drawing that are not included on the cut sheets... or did i miss them?
JaxLax is offline  
post #8 of 286 Old 04-12-2008, 08:10 PM
AVS Special Member
 
robertcharles's Avatar
 
Join Date: Jul 2007
Location: New Orleans
Posts: 1,658
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 14
I like those boxes. I am looking at getting 4 of the parts express tc closeouts. Maybe we could go with a box somewhat like yours if they model well.
robertcharles is offline  
post #9 of 286 Old 04-12-2008, 08:14 PM - Thread Starter
AVS Special Member
 
NEO Dan's Avatar
 
Join Date: Jul 2006
Location: North East Ohio
Posts: 2,978
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 11
Quote:
Originally Posted by JaxLax View Post

you have 6 braces (the long ones that create the port) in the drawing that are not included on the cut sheets... or did i miss them?

Good point, I think there is more than enough scrap to get these cut.

Regards,
Dan
NEO Dan is offline  
post #10 of 286 Old 04-12-2008, 08:40 PM - Thread Starter
AVS Special Member
 
NEO Dan's Avatar
 
Join Date: Jul 2006
Location: North East Ohio
Posts: 2,978
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 11
Quote:
Originally Posted by robertcharles View Post

I like those boxes. I am looking at getting 4 of the parts express tc closeouts. Maybe we could go with a box somewhat like yours if they model well.


Right,
like you would ever NEED another sub

Just busting your chops

You've not even got your BEAST running yet.

Your just hooked on MDF dust ........ Like me

Those TC colseout 12" are a sweet deal, 3= 4ohm load though.

Me, I like the 19Ov.2, as long as the params are not BS.

I ordered an 19Ov.2 this afternoon. So we shall see shortly.

I requested in the notes of my order that they include detailed TS params (including inductance) for both versions of the 19Ov.2 to be published in this thread along with the parameters I measure here. We shall see if there service/support is on the ball

Regards,
Dan
NEO Dan is offline  
post #11 of 286 Old 04-12-2008, 10:17 PM
Senior Member
 
Kil4Thril's Avatar
 
Join Date: Jan 2007
Posts: 318
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
Just PM Mandos here at the forum, and he'll post the numbers in the thread.

Sorry, PM Chris Schempff or alexlindeman - I gave a different forum name.

will work for sushi
Kil4Thril is offline  
post #12 of 286 Old 04-13-2008, 11:47 AM - Thread Starter
AVS Special Member
 
NEO Dan's Avatar
 
Join Date: Jul 2006
Location: North East Ohio
Posts: 2,978
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 11
Quote:
Originally Posted by Kil4Thril View Post

Just PM Mandos here at the forum, and he'll post the numbers in the thread.

Sorry, PM Chris Schempff or alexlindeman - I gave a different forum name.

Kil4Thril,
Good idea. I'll invite them over while I'm at it


*****

Here is a preliminary of the in-room response I am shooting for. This would take into account a custom modded EP2500 filter section and room gain of 6dB per octave @30Hz. Most rooms have better gain than that. The rising response will be mostly eliminated by bass management, but this gives you the option to raise the X-over point for when you want to get lots of impact.
I have a couple parametric EQ's already that will allow me to prototype this filter before I mod the EP2500. I am waiting to order the EP2500 until after I've got the sub completed, should take about a week.

Regards,
Dan
NEO Dan is offline  
post #13 of 286 Old 04-13-2008, 03:57 PM
AVS Special Member
 
robertcharles's Avatar
 
Join Date: Jul 2007
Location: New Orleans
Posts: 1,658
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 14
I am having such a good tim e building, just looking for more, but different.
robertcharles is offline  
post #14 of 286 Old 04-13-2008, 08:26 PM - Thread Starter
AVS Special Member
 
NEO Dan's Avatar
 
Join Date: Jul 2006
Location: North East Ohio
Posts: 2,978
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 11
I have now inhaled enough mdf fiber to officially have "Woodboogers"



Hopefully I'll get the four holes router'd out in the braces and then it's on to glue up

Regards,
Dan
NEO Dan is offline  
post #15 of 286 Old 04-13-2008, 09:56 PM
Member
 
Kubbie's Avatar
 
Join Date: Oct 2007
Location: Burbs of Chicago
Posts: 160
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
Quote:
Originally Posted by NEO Dan View Post

I have now inhaled enough mdf fiber to officially have "Woodboogers"

Being a carpenter for years, I know what you mean. If the respirator is too bulky, get yourself some decent masks at least. Almost all mdf is manufactured with formaldehyde resins. MDF particles are much smaller than standard wood dust, get lodged deeper in the lungs and potentially cause more damage.

In addition, enough long term exposure to plain, straight 'ole wood dust can be carcinogenic.

Enough with the scaring, it will be an irritant, headaches, asthma, allergies. I myself get sinus infections a few times a year.

And shopvacs help catch some of the dust, but it being so small, you need a 1 micron filter to catch it all, you end of just circulating it around...

I don't mean to sound like your mom or school shop teacher, but fact is they did know a thing or two...
Kubbie is offline  
post #16 of 286 Old 04-14-2008, 11:47 AM - Thread Starter
AVS Special Member
 
NEO Dan's Avatar
 
Join Date: Jul 2006
Location: North East Ohio
Posts: 2,978
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 11
Kubbie,
I had a headache till just a couple hours ago. I used to get nosebleeds when I cut lots of MDF.

Regards,
Dan
NEO Dan is offline  
post #17 of 286 Old 04-16-2008, 05:58 AM - Thread Starter
AVS Special Member
 
NEO Dan's Avatar
 
Join Date: Jul 2006
Location: North East Ohio
Posts: 2,978
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 11
Update,
eD shipped yesterday, yea.
It's about this far away:


I'm feeling a bit screwed though. I can't locate my Jasper Jig to cut the two holes in the braces:


I've got no real extra cash ATM so I'm gonna give a good look around before I bite the bullet and go buy another router that I have a Circle Jig for.

Regards,
Dan
NEO Dan is offline  
post #18 of 286 Old 04-16-2008, 06:18 AM
AVS Special Member
 
tundrSQ's Avatar
 
Join Date: Nov 2006
Location: Vermont
Posts: 2,217
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 12
You can cut the holes with a jigsaw..in fact I would NEVER use a router with MDF....maybe I'm a wuss....but its bad enough using a table saw with it.

Baltic Birch is your friend!!!!

Tim
tundrSQ is offline  
post #19 of 286 Old 04-16-2008, 11:52 PM - Thread Starter
AVS Special Member
 
NEO Dan's Avatar
 
Join Date: Jul 2006
Location: North East Ohio
Posts: 2,978
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 11
tundrSQ,
i have some Baltic Birch but I I'm more partial to MDF, that is the saw is more partial to it.

I found the Jasper Jig I had used it as a shim when I reassembled s squirrel cage fan from a HVAC unit. that was why I knew I had just seen it. I had been walking by it several times daily.

There was decent progress today: click on picture for slideshow


And my driver has left columbus and should be local within the next hour or so.

Regards,
Dan
NEO Dan is offline  
post #20 of 286 Old 04-17-2008, 07:00 AM
Advanced Member
 
kemist1117's Avatar
 
Join Date: Apr 2007
Posts: 539
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 12
Dan can you post the 15" table build.

Is it the same tune as this one?

I am looking to order a C15.1 from AE (supposed to be similar to the AV15) and was looking for build options.
kemist1117 is offline  
post #21 of 286 Old 04-17-2008, 07:20 AM - Thread Starter
AVS Special Member
 
NEO Dan's Avatar
 
Join Date: Jul 2006
Location: North East Ohio
Posts: 2,978
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 11
kemist1117,
the origional version is narrower at 18.5" . I would tennetavely recomend the 21" wide version I am building now, but hold on untill I confirm tuning. I Will have to redraw the origional if you want it.

Here is a link to the origional

The current has more bracing and a double baffle to allow you to flush mount the driver

Regards,
Dan
NEO Dan is offline  
post #22 of 286 Old 04-17-2008, 07:40 AM
AVS Special Member
 
price3's Avatar
 
Join Date: Jan 2003
Location: Clemson, SC
Posts: 1,181
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 11
Kind of OT, but if you are dealing with a regular MDF butt joint at 90 degrees, how big of a roundover can you do before you have to worry about cutting through the wood? I would think 1.5" is getting to that point already... Anyone know?

Those look like nice bar clamps Dan, what kind are they?
price3 is offline  
post #23 of 286 Old 04-17-2008, 08:10 AM - Thread Starter
AVS Special Member
 
NEO Dan's Avatar
 
Join Date: Jul 2006
Location: North East Ohio
Posts: 2,978
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 11
I used 1.5" raidus in the drawings, there's still plenty of meat there.
The bar clamps are from Rockler. Not cheap but I catch them on sale.

Regards,
Dan
NEO Dan is offline  
post #24 of 286 Old 04-17-2008, 09:41 AM - Thread Starter
AVS Special Member
 
NEO Dan's Avatar
 
Join Date: Jul 2006
Location: North East Ohio
Posts: 2,978
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 11
Plenty of meat in the corners, see:

Regards,
Dan
NEO Dan is offline  
post #25 of 286 Old 04-25-2008, 08:41 PM - Thread Starter
AVS Special Member
 
NEO Dan's Avatar
 
Join Date: Jul 2006
Location: North East Ohio
Posts: 2,978
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 11
My woofer got punted by FedEx, causing a bent frame and loose motor assembly:

But I guess that is to be expected when the motor is 2-25mm slices of magnet and a 19mm top plate


Alex at eD was quick to start the process to get the driver picked up and a new one on it's way. I should have a replacement tomorrow.

Regards,
Dan
NEO Dan is offline  
post #26 of 286 Old 04-25-2008, 08:45 PM
AVS Special Member
 
michael hurd's Avatar
 
Join Date: Nov 2007
Location: 49th parallel
Posts: 2,111
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Liked: 25
That's gotta suck, but that is what insurance is for. I have seen cast aluminum frames broken via impact... it seems that if it is heavy and has a fragile sticker.... it is more apt to damage.

"You take the blue pill - the story ends, you wake up in your bed and believe whatever you want to believe. You take the red pill - you stay in Wonderland and I show you how deep the rabbit-hole goes."
michael hurd is offline  
post #27 of 286 Old 04-27-2008, 11:24 AM - Thread Starter
AVS Special Member
 
NEO Dan's Avatar
 
Join Date: Jul 2006
Location: North East Ohio
Posts: 2,978
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 11
I finally got one finished
Here is the impedance data for tuning:
;===================================================
Vented box test completed: Sat Apr 26 21:51:39 2008
Vented box drive current 3181.82 uA
Shunts: No Shunts Used
;------------------------------------------------------------------
Revc = 5.1217 (box test)
flo = 7.6685, Zlo = 26.5810
fhi = 34.8161, Zhi = 70.4773
fm = 10.4869, Zmid = 5.8855
Fsb = 25.4592
Ha = 0.4119
Alpha = 0.7912
Qloss = -1.#IND
;-------------------------------------------------------------------

Regards,
Dan
NEO Dan is offline  
post #28 of 286 Old 04-28-2008, 09:22 AM - Thread Starter
AVS Special Member
 
NEO Dan's Avatar
 
Join Date: Jul 2006
Location: North East Ohio
Posts: 2,978
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 11
It lives

Regards,
Dan
NEO Dan is offline  
post #29 of 286 Old 04-28-2008, 11:19 AM
AVS Special Member
 
alexlindeman's Avatar
 
Join Date: Nov 2006
Location: Newton, IA
Posts: 1,040
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
Glad to see the other one arrived safely.
alexlindeman is offline  
post #30 of 286 Old 04-28-2008, 12:48 PM
Member
 
JaxLax's Avatar
 
Join Date: Jan 2007
Location: Jacksonville
Posts: 30
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
test it, test it, test it!!!
I want to build something very similar this summer...
JaxLax is offline  
Reply DIY Speakers and Subs

User Tag List

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page


Forum Jump: 

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off