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Discussion Starter · #1 ·
I have had a Maelstrom 18" in a Sonosub that was ported and the driver died for
1 year ago and have not have any subwoofer after that.

Now have the drive came after a new build.

My price limit on the driver are 200 USD/each and this are what a find.

This time i want to build a pair of subwoofers and have very limited expertis on this area
and all help are needed.

What must i think on, how much polyfill , area on the ports and length and how many ??

Material choice are MDF 19 mm or 22 mm, i guess you dont use the same measure system.
 

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Discussion Starter · #2 ·
I have seen a lot of Sealed SI 15"HT & SI18"HT builds on this forum.

What is perform win for ported and what are + for sealed box type ??

This will be used for 85% for movies and 15% for music.

So movies are that it will be tuned for.
 

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Discussion Starter · #5 · (Edited)
I have also seen this thread on a Sealed 4 Cubic feet box.

http://www.hometheatershack.com/for...oofer-klipsch-palladium-p17-4.html#post613603

post 36, on last pitchure say that if you are giving the driver 1375 watt of power the
perfomance win are good in that size of box.

How much different are that on that sealed box type against the ported and what box are
the easier one to build for a amateur ??

Or is it better to get a bigger 6 Cubic feet Sealed and will this box type also get performance win with more power to the driver ??
 

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1375 watts is a lot for a driver rated at 600 watts, I personally wouldn't push it past 1000 watts.

How much different are that on that sealed box type against the ported
The difference is shown in post #3 in the SPL graph.

and what box are the easier one to build for a amateur ??
Sealed would be easier I guess, your only cutting one hole for the driver.



 
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