Originally Posted by steve nn
Same effect basically. I’m sure there is a . something-something difference though. Since you’re on the small side I would go the 4-5” route then. If you were to fluff it, it would most likely lightly stuff your enclosure. That’s not going to be to much at all. No insulation will not make your enclosure/cu ft smaller, it’s the same as polly. Some don’t like insulation do to the fiberglass though. I have no problem with it, it’s not like it was in the 60’s. Can I bother you to confirm are you lining your sono or stuffing it? You can stuff a sono if you want, even though it is downfiring.
EDIT>One more time for you..Anybody else I would just give up!
I know you’re not going to like hearing this, but let me say it one more time. You might like your sub better with no stuffing or liner for that matter. That’s why I wanted you to compare one with and one without. Many go with 1/2 of the suggested rule and find they like that better. Some find they like none at all! There is a max rule 2 pounds per cu ft, but I would not go there, your not going to like that at all imo. I know you want slam!
Alright buddy.... I have not been ignoring this post.
I 've put a lot of thought and time reading into it and I've decided to start with .5 lbs per cubic foot. I could go on and on about the several things I based my decision on but the short of it is-
- I've never had a box that is properly sized need polyfill
- I've never had a box that was so small that going past the fill limit made it sound like it was the correct sized box
- I have had a box, one, that was just a bit too small. Polyfill made a huge difference. I forget how small, and how much polyfill I added. Wish I had notes.
With the SI 18's modeling better in a box bigger than 4 CF I could go either way. Add a little for some a bit of low end help or add none. In this situation I think a bit of polyfill will help with box size (Q and FS numbers) as well as dampen the enclosure a bit and make it not so 'boomy'.
I've decided the only way I'll pull a sub out and remove the fill is if I am not happy with the way it sounds.
I'm getting to the point where it's time to be done with tinkering and start enjoying....... ... after a long day snowboarding up at Mt. Hood.
You made me think more than I would have, and I thank you for that.