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Old 02-16-11, 02:37 PM   #11
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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


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Old 02-16-11, 02:47 PM   #12
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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.


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Old 02-16-11, 02:53 PM   #13
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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 =


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Old 02-16-11, 04:05 PM   #14
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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.

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Old 02-16-11, 11:53 PM   #15
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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.


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Old 02-17-11, 01:29 AM   #16
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Re: Need advice Mal-X 21" EP4000 build


Dito, do it you know you want to!


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Old 02-17-11, 11:39 AM   #17
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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.

Attached Files
File Type: wpr 30ft 16hz 2 ports.wpr (1.6 KB, 36 views)

11, it is one louder.

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Old 02-17-11, 11:55 AM   #18
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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

Attached Files
File Type: wpr 21 malx 14hz 30 cu ft.wpr (1.6 KB, 31 views)

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Old 02-17-11, 12:41 PM   #19
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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..


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Old 02-17-11, 01:16 PM   #20
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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.

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