7.6 cu.ft Maelstrom- X 18" build - Page 2 - Home Theater Forum and Systems - HomeTheaterShack.com

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post #11 of 305 Old 08-06-09, 08:04 PM
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Re: 7.6 cu.ft Maelstrom- X 18" build

Are you using the EP2500? Do you have the HPF in already?

I wouldn't run it too crazy without the HPF yet as you could do some damage

It is a excellent sub which I use in a sealed enclosure and blows me away. I can't imagine how crazy it must sound in your ported box.

Head the warning of the HPF though as I have read of someone already toasting his Mal-X
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post #12 of 305 Old 08-06-09, 08:48 PM
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Re: 7.6 cu.ft Maelstrom- X 18" build

Your egg crate foam is open cell. Looking forward to the pics!




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post #13 of 305 Old 08-06-09, 08:53 PM Thread Starter
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Re: 7.6 cu.ft Maelstrom- X 18" build

Quote:
sub_crazy wrote: View Post
Are you using the EP2500? Do you have the HPF in already?

I wouldn't run it too crazy without the HPF yet as you could do some damage

It is a excellent sub which I use in a sealed enclosure and blows me away. I can't imagine how crazy it must sound in your ported box.

Head the warning of the HPF though as I have read of someone already toasting his Mal-X
No, I'm still just using the Yamaha 150w plate amp. It does appear to have a pretty high HPF sadly enough.
I wouldn't use an amp that could damage the sub without a HPF on it.


I will be installing the foam tonight. What will it change for the sound? Just make it go lower?

Thanks
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post #14 of 305 Old 08-06-09, 09:22 PM
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Re: 7.6 cu.ft Maelstrom- X 18" build

GREAT JOB so far!!!!!!!!!!!
Driving the amp into clipping is not exactly healthy for the Mal-x and making noises is even worse.
Be careful!

Matt
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post #15 of 305 Old 08-06-09, 09:54 PM Thread Starter
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Re: 7.6 cu.ft Maelstrom- X 18" build

Thanks for the kind words

As soon as I heard the noises, I immediately stopped. I am taking it easy now
Why would clipping be bad for the Mal-X also?
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post #16 of 305 Old 08-06-09, 10:59 PM Thread Starter
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Re: 7.6 cu.ft Maelstrom- X 18" build

Some more pictures:

I found out that pictures do this driver no justice at all...



Cutting the holes for the braces:




Me cutting those holes:



The finished brace. We rounded over all edges of the wood and used sand pape to make it more smooth to keep airflow good:



We put a little crossbrace to help keep the two braces from vibrating too much:









Siliconing around the port and in the inside back of the box:







The braces installed. We rounded over all edges of the wood and used sand paper to make it smooth to keep airflow good:














The top braces is about half an inch away from the top of the port, to keep the airflow smooth:



Test fitting the driver:









Temporary bolts until it gets painted. We used T-nuts to keep it secured:





The box in my room:





I wish that there would be a way that I could make the box around 13 cu.ft and keeping the same dimmensions. But, that's the way it goes. Hopefully it will REALLY shake the walls when I get a new amp? lol. It's already impressive with the current amp, but I can't imagine what it will be like with the EP2500 and the Reckhorn B-1.

Hopefully this is a good build thread haha.
I will post pictures of the foam when I get it in the box.

Thanks again to everyone for the help.

Last edited by sub_junkie; 08-06-09 at 11:10 PM.
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post #17 of 305 Old 08-06-09, 11:07 PM
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Re: 7.6 cu.ft Maelstrom- X 18" build

It looks like it's all coming along nicely. Well done.

Silence is golden but duct tape is silver.

DIY completed:

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post #18 of 305 Old 08-06-09, 11:11 PM Thread Starter
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Re: 7.6 cu.ft Maelstrom- X 18" build

Thank you
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post #19 of 305 Old 08-06-09, 11:15 PM
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Re: 7.6 cu.ft Maelstrom- X 18" build

Nice!

Just a tip on using T-nuts. Use some Gorilla glue to keep them secure as they always seam to back out or lose there grip on the MDF.
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post #20 of 305 Old 08-07-09, 08:22 AM
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Re: 7.6 cu.ft Maelstrom- X 18" build

It appears you used washers and the mounting bolts are on the outside of the rubber ring. Remove the washers and screw the bolts down to the subs metal frame. You should also use some foam weather striping between the rubber ring and the box to ensure an airtight seal.




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