Need advice Mal-X 21" EP4000 build - Page 2 - Home Theater Forum and Systems - HomeTheaterShack.com

Reply
 
Thread Tools
post #11 of 23 Old 02-16-11, 02:37 PM
Elite Shackster
gperkins
 
Join Date: Aug 2008
Posts: 3,068
Re: Need advice Mal-X 21" EP4000 build

As I said before I have two 15 cu ft (net) subs in my 17 x 17 foot living room. Dimensions are 48" high by 24" wide by 30" deep and they dont look that big I don't think. The malx is a big driver and will need at least a 20 cu ft box to make it work to its most efficency.

He could go sealed but I think he will be loosing out on alot off spl down low.

This is why the sonosub is so favourable.

cheers

Graham
gperkins_1973 is offline  
Sponsored Links
Advertisement
 
post #12 of 23 Old 02-16-11, 02:47 PM
Elite Shackster
 
Zeitgeist's Avatar
Jim
 
Join Date: Apr 2009
Location: Ohio
Posts: 2,116
Re: Need advice Mal-X 21" EP4000 build

Compared sealed vs ported - on the low end... I agree.

Large, low tuning definitely gives you A LOT more.

I was surprised.
Zeitgeist is offline  
post #13 of 23 Old 02-16-11, 02:53 PM
Elite Shackster
gperkins
 
Join Date: Aug 2008
Posts: 3,068
Re: Need advice Mal-X 21" EP4000 build

Its pretty amazing what you can do with that 21" driver it really is.

2 21" malx's with an EP4000 on each sub =
gperkins_1973 is offline  
post #14 of 23 Old 02-16-11, 04:05 PM Thread Starter
Senior Shackster
 
1hagop's Avatar
 
Join Date: Apr 2010
Location: Mountain House, Ca.
Posts: 132
My System
Re: Need advice Mal-X 21" EP4000 build

You guys are great you are giving me tons to think about. I already have 2 sonosubs they are 15" CSS SDX in 16" sonotubes 4 feet high. I am wondering maybe I could do 30" or 36" sonosub and 4 feet high to match the SDX's.
That would be 18.7 for the 30" and 27.3 for the 36". I have the floor space, keep encouraging me and we shall see what I decide. Also is there a volume that you all would think would be the best? Let me know and I will see if I can make it work.

Thanks again for all your support on this!!!!!

BTW 30^3ft would be 53" high. I think I could pull that off!

11, it is one louder.
1hagop is offline  
post #15 of 23 Old 02-16-11, 11:53 PM
Senior Shackster
 
vann_d's Avatar
vann_d
 
Join Date: Apr 2009
Location: Denver
Posts: 887
My System
Re: Need advice Mal-X 21" EP4000 build

Dude, the bigger and lower tuned on this driver the better.

I have not seen (virtually via internet) anyone build a LLT with the Mal-X 21. This would kick serious bass.

People building large sealed enclosures with this driver are blown away. Think of what a large ported sub will do for you.
vann_d is offline  
post #16 of 23 Old 02-17-11, 01:29 AM
Elite Shackster
gperkins
 
Join Date: Aug 2008
Posts: 3,068
Re: Need advice Mal-X 21" EP4000 build

Dito, do it you know you want to!
gperkins_1973 is offline  
post #17 of 23 Old 02-17-11, 11:39 AM Thread Starter
Senior Shackster
 
1hagop's Avatar
 
Join Date: Apr 2010
Location: Mountain House, Ca.
Posts: 132
My System
Re: Need advice Mal-X 21" EP4000 build

Quote:
gperkins_1973 wrote: View Post
Dito, do it you know you want to!
Yes I do. So I do not know anything about a ported build.
Where do I buy the ports?
Can I do more than on port, a 30^3ft build would be too long of a port could I do 2 shorter ports, or 3?
I am leaning toward a 36" sonotube 53" tall. If it is tuned to 16hz it looks like a pretty good line on winisd, but then again I do not know what I am doing in that program. Here is what I played with.

11, it is one louder.
1hagop is offline  
post #18 of 23 Old 02-17-11, 11:55 AM
Elite Shackster
gperkins
 
Join Date: Aug 2008
Posts: 3,068
Re: Need advice Mal-X 21" EP4000 build

I wouldn't bother with a 16hz tune on that sized sub. Here's a winisd file for you.
30 cu ft
Tune - 14hz
12" round port 42.84" long
Input power 1500 watts
Port velocity - 22 m/s
1st port resonance - 158hz


You could go with a 10" round port but it raises the port velocity up to about 32 m/s and if you decided to throw more power at it over the 1500 watts it would go higher.

cheers

Graham
gperkins_1973 is offline  
post #19 of 23 Old 02-17-11, 12:41 PM
Elite Shackster
 
Zeitgeist's Avatar
Jim
 
Join Date: Apr 2009
Location: Ohio
Posts: 2,116
Re: Need advice Mal-X 21" EP4000 build

I'm going to go ahead and move this into the Ported Build projects - since it seems to be a better fit now..
Zeitgeist is offline  
post #20 of 23 Old 02-17-11, 01:16 PM Thread Starter
Senior Shackster
 
1hagop's Avatar
 
Join Date: Apr 2010
Location: Mountain House, Ca.
Posts: 132
My System
Re: Need advice Mal-X 21" EP4000 build

Quote:
gperkins_1973 wrote: View Post
I wouldn't bother with a 16hz tune on that sized sub. Here's a winisd file for you.
30 cu ft
Tune - 14hz
12" round port 42.84" long
Input power 1500 watts
Port velocity - 22 m/s
1st port resonance - 158hz


You could go with a 10" round port but it raises the port velocity up to about 32 m/s and if you decided to throw more power at it over the 1500 watts it would go higher.

cheers

Graham
Okay so I likes what I sees!

What do I do about the port. 12" PVC??? Do I center the port on the opposite side of the sonotube as the speaker or same side offset? I have never built a ported sub. Does the port tube stay straight or do I put a 90 in it.... I do not know
Thanks!

11, it is one louder.
1hagop is offline  
Reply

Bookmarks

Tags
21" , advice , build , ep4000 , mal-x

Quick Reply
Message:
Options

Register Now




PLEASE COMPLETE ALL REQUIRED FIELDS BELOW... THANKS!

REQUIRED FIELDS ON THIS PAGE
YOU MUST COMPLETE ALL OF THESE

Username
Password
Confirm Password
Email Address
Confirm Email Address
Random Question
Random Question #2




User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
PLEASE READ BELOW PRIOR TO ENTERING AN EMAIL ADDRESS!

ATTENTION!

YOU MUST ACTIVATE YOUR ACCOUNT!

Activation requires you reply to an email we will send you after you register... if you do not reply to this email, you will not be able to view certain areas of the forum or certain images... nor will you be able download software.

AN INVALID EMAIL ADDRESS WILL CAUSE YOUR ACCOUNT TO BE DELETED!

See our banned email list here: Banned Email List

We DO NOT respond to spamcop, boxtrapper and spamblocker emails... please add @hometheatershack DOT com to your whitelist prior to registering or you will get nowhere on your registration.


Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



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



Posting Rules  
You may post new threads
You may 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 is not allowed!
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

 


For the best viewing experience please update your browser to Google Chrome