so this pic i seen with those subs like that they look like lab15s I'm sure there not but what if i used lab15s like that in a ported box? right now i have 4 18ins dayton in a sealed box.. labs better then the daytons? or should i just put my 4 18s in a ported box?
You can build better than that, but similar. I did so with my 18s. Just balance out how much cubic footage you can spare and how low you want the tune. You can model it up in winisd or something similar. Which Daytons do you have?
Thats dopee! I have 4 of the dayton rs18ho i believe powered by a ep4000. Which do you have? And what is the tunning of that box? I was talking about building a ported box a while back but never had the B's to do it so i order 4 seald flatpacks from DIY soundgroup. But i want more output. I think tuning to 19hz is fine for me dont need lower maybe 15hz the lowest. How does that sound? Spl? Build thread?
You can certainly beat Imax subs at home. I'm surprised you aren't happy with 4 18's . Have you measured / tweaked what you have? At that level, your room is certainly effecting what your ears perceive, and measuring what you have is the only way to know what needs improvement. Room size and listening preferences are also critical, as well.
i mean it okay to the avg joe i guess but i would like it to be crazy!!! never measured need to get my self some gear and software! the room i have is huge!!! 45w X 20L X 9H and then opens to another space about 12L x 8W X 9H and then staircase on both sides on the room.
IMAX has a unique signature that's really strong in the midbass. Even when running 8 sealed 18s I didn't capture the same effect. I like IMAX especially the well designed ones. I'd just like that sound to extend down to 15hz or lower.
i also like midbass that feeling in your chest type thing! 15hz i think is perfect for tuning for me a least.. unless i just add another 4 18in sealed!! have a total of 8! or just port them i think I'm a fan of ported subs more then sealed.
thanks man very cool! now for giggles what about 8 sealed? i have to to make the car audio place near me build an enclosure they said about 200$ for the build. for each enclosure so 400 total. wish i could afford those ultras now. but for the price of the daytons you can't beat them there great subs!!
'Our minus 3dB point is 20Hz. Yeah, it is very low. The loudspeakers, both the sub-bass and the full-range systems, are custom-designed and manufactured by IMAX. They are designed to fit our theatres. So we have separate systems, depending upon the room and its volume. We have different systems for different-sized rooms. The rooms are acoustically treated and we have a proprietary acoustical standard that works with our post-production audio mastering standard.
'We manage our sub-bass differently. All our speakers are full-range, even the surrounds. The amplifiers are made to our specifications, custom-designed for our environment.'
Being in the DIY section of this forum "very low," would be -3db 10hz. I am sure most of the members here in this section of the forum can blow candles out at 2ft 23hz in almost every ported design or Horned design.
I remember Imax at chicago with DSL equipment was hitting around 15hz I believe with authority. That being said being said if you wanted the full IMAX dynamics I think your best bet is to copy Not's system in total. Maybe just four ported 18's but make sure to get similar mains as his. Thats where most people, I feel, are missing the big cinema experience. Most HT's in the DIY section have better extension subs but are missing the dynamics from 60-280hz. A dual 15" setup with capable subs would not be missing anything dynamically.
I love the Imax theaters but it has mainly been for the image from the screens. I dont have a dedicated room so I still go and see movies there when I can.
pretty sure the imax subwoofers are using Lab12's not 15. Interesting that they went with multiple 12's instead of the 18's they used to go with. Very low output in the acoustic volume of a commercial theatre vs a very small HT room are 2 different things. like comparing a car interior volume to a larger HT. To get full output at 20hz is impressive. What would the Imax subs sound like in a typical HT? I know the ultimate solution seems to be very very low 10hz type thing but I know I kinda like the idea of a pro sub (or pro woofer) that can get down 18 - 20 hz range along with ultimate upper bass output vs ultimate very low that can almost do pro upper bass if that makes any sense. Seems the Lab 12 -15 are pretty good woofers at a good price.
YESS! I feel the same! Lab 12s are pretty cheap and i can get 16 of those for 2400$ imagine that in ported enclosure tuned to 15hz!!!!! Deff something to think about! Might have to do a simulation on that see what type of spl i can get.
Just to clarify some things, you say you feel like you aren't getting enough midbass. Midbass is between 50 hz and about 150 hz. Some call it "chest punch" or "kick". You get this vibration in your chest from it. The low end of mid bass is all from your subs, and the high end of mid bass is from your speakers (or mid bass sub). Changing your subs from sealed to ported doesn't change 50-150 hz at all. Have you tried eq'ing your 50-150 hz frequency to get more mid bass? Four 15" subs will give you quite amazing mid bass punch in most rooms if they're set up right.
Changing to ported will give you nice low end gains for low bass in electronic music, and for many movies, but it's not adding chest punch.
Also, blowing out candles with a sub isn't impressive, my $200.00 polk can do that haha .
Just to clarify some things, you say you feel like you aren't getting enough midbass. Midbass is between 50 hz and about 150 hz. Some call it "chest punch" or "kick". You get this vibration in your chest from it. The low end of mid bass is all from your subs, and the high end of mid bass is from your speakers (or mid bass sub). Changing your subs from sealed to ported doesn't change 50-150 hz at all. Have you tried eq'ing your 50-150 hz frequency to get more mid bass? Four 15" subs will give you quite amazing mid bass punch in most rooms if they're set up right.
Changing to ported will give you nice low end gains for low bass in electronic music, and for many movies, but it's not adding chest punch.
Also, blowing out candles with a sub isn't impressive, my $200.00 polk can do that haha .
you are right makes sense.. but I do prefer ported subs to sealed.. need to upgrade speakers which I think will satisfy me a lil more. prob going to go with porting my 4 18in subs when I get the money. going to Mexico tomorrow so have to pay for trip first.
until recently, mostly in the 40-50hz ballpark. now it is more common for hits down around 30hz and in some cases, down past 20hz. if that is what you like then really nailing it from 25-50hz is where you want to focus.
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