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Discussion Starter · #1 ·
I've been lurking for a while and have gone through the member's database. I originally thought I'd do the "easy button" design but am now wanting to go with a sonotube as I do have the room for a "water heater". My problem is using or in my case not being able to use/understand WinISD as I don't know if I can go as large as others have with different subs. Can I safely do 600-650 liters with this driver tuned to 14 hz? Or what would be better? I will be powering with EP2500 and taming with BFD 1124. I also assume a HPF is in the cards right? :scratch:

Thx in advance!
 

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In a way, yes. The bigger the room the more low end output it will take to fill the room. With a 15 hz tuning you may not need a HPF, it will depend how hard you push the sub. The advantage of the EP2500 is it has enough power to drive a second sub should you decide you want more output in the future.
 

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Discussion Starter · #8 ·
no wonder I can't figure out WinISD - simple math stumps me... :dumbcrazy:

Seriously though I measured the area last night of my new HT room in the basement and it's more like 21' x 24' and is concrete behind all drywall except the ceiling. Should I think about two 370L subs as Mike suggested which equates to more time and money or can I look at going with a larger lower tuned design? It would be easier/cheaper to go with a larger sonotube than buying two subs - but if the modeling of the IXL 18 doesn't match with larger displacement than I'll understand. Right now I have (2) powered 10" subs that aren't doing anything for me in that space.....(hence the need to upgrade)
 

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In a 21' x 24' concrete room you'll need 2 subs if you're looking for a HT experience in my opinion. You can build one to start with and build a second in the future if one sub isn't enough as I would suspect.
...or can I look at going with a larger lower tuned design? It would be easier/cheaper to go with a larger sonotube than buying two subs...
It needs to be understood that going larger and lower does not translate into louder. Tuning a sub to 12 hz would give more low end extension at the result of overall SPL. In your concrete bunker you need all the SPL you can get. For your application it's all about finding the right balance of low end extension and SPL.
 

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The air speed would be too high with a 6" diameter port. An 8" diameter by 41" long would keep the air speed to 23 m/s maximum. The port length should still give you enough room between the back of the sub and the end of the port if using a 24 inch diameter sonotube.
 

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If you cut one inch off the length of the port tube to create enough clearance it will have no noticeable effect of the out put from the sub and you can still use the 24" diameter sonotube. I know they make 22" diameter tubes, I don't remember seeing a 23" diameter tube.
 
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