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S.E.O.S.R. MEGA BUILD - Page 39

post #1141 of 1502
Quote:
Originally Posted by LTD02 View Post



is there an optimal length


Could matter. My first thought jumped to AC alignment. Further back would align better with a deep horn. Not really necessary with the SEOS as it's fairly shallow. How deep is the SEOS 24?

I don't doubt there's some acoustic loading going on by firing the drivers in like that. I'm getting very anxious to try some things now biggrin.gif To bad my weekend is sooo busy. Next weekend is Canadian Thanksgiving so I should have some time then. I hope.
post #1142 of 1502
Thread Starter 
Quote:
Originally Posted by LTD02 View Post

ivan beaver has an interesting formula...i assume it comes from tom danley. where else would it come from? :-)~

http://www.avsforum.com/t/1405783/the-very-low-budget-diy-synergy-horn-build/60#post_22036699
so, for 24" wide 90 degree horn

1,000,000 / 24 * 90 hz = 1,000,000 / 2160 hz = 462 hz!

some things were meant to be :-)

Chop does the happy dance biggrin.gif

Quote:
Originally Posted by tuxedocivic View Post

Could matter. My first thought jumped to AC alignment. Further back would align better with a deep horn. Not really necessary with the SEOS as it's fairly shallow. How deep is the SEOS 24?

I don't doubt there's some acoustic loading going on by firing the drivers in like that. I'm getting very anxious to try some things now biggrin.gif To bad my weekend is sooo busy. Next weekend is Canadian Thanksgiving so I should have some time then. I hope.

The seos24 is 7.9" deep
post #1143 of 1502
no c.d. mounting plate on this one and not sure if the depth varies depending on the diameter of the throat, but this is what is on site:

CREATOR: gd-jpeg v1.0 (using IJG JPEG v62), quality = 90
post #1144 of 1502
The OCD inside of me is forced to inform you that dimensional analysis doesn't work smile.gif
post #1145 of 1502
how do you mean?
post #1146 of 1502
Thread Starter 
Quote:
Originally Posted by LTD02 View Post

no c.d. mounting plate on this one and not sure if the depth varies depending on the diameter of the throat, but this is what is on site:

CREATOR: gd-jpeg v1.0 (using IJG JPEG v62), quality = 90

If I remember correctly, the mounting flange's inside diameter is the same as the outside of the seos' end....it flush mounts to it, so there shouldn't be any depth difference. When I can get at one later I will measure it to be sure.
post #1147 of 1502
Thread Starter 
Ladieeees and Gentlemennnnnnn....

The SEOSR 215C.....yes I make up silly speaker names too biggrin.gif



The SEOSR 415T.....the super speaker



Keep in mind, these are just for show, pre bracing, even pre port cutouts...I just knew a few people wanted to get an idea of the size of them, so I stacked them in position. For scale, I'm 6'2", about 235-240lbs...

Yeah, they're big:D
post #1148 of 1502
That picture made my day! Awesome!
post #1149 of 1502
BEAST!!!! They look great.
post #1150 of 1502
Thread Starter 
Yeah, they are really imposing. It was such a tease though, to just clamp the mounting baffles to the boxes for pics, know I still had to add all the bracing, mount the ports to the baffles, flush trim, etc. before mounting the drivers and turning these mammoths on! I took these a couple of days back and really haven't gotten to do a lot since. Hopefully the weekend will see them finished up, then the real work begins:)
post #1151 of 1502
Wow, Chop - that's incredible!! What are the dimensions in the second picture? 27"ish wide and 8'4" ish tall?
post #1152 of 1502
Thread Starter 
Quote:
Originally Posted by carp View Post

Wow, Chop - that's incredible!! What are the dimensions in the second picture? 27"ish wide and 8'4" ish tall?

Very close...8' tall on the nose, 26" wide and 16" deep. If the vertical quad 15 arrangement is the one that makes it into the HT, I will probably add a bit of depth to the base and top in order to bring the height down just a few inches. It will all depend on my screen decision....CIH or CIA, so we'll see. I just want to be sure the height doesn't exceed the screen height...at 2:1, the screen will be 8', but if I go 2:37 it will be about 8" shorter I will trim a few inches from the top and bottom. It could all be moot though if the dual sounds best or the horizontal or angled version...then it won't matter. I have to say though, when I stacked them up just to look at them, there is something about an 8ft tall speaker that makes you smile from the inside out biggrin.gif
post #1153 of 1502
Ha, yeah I bet you are hoping that the monster speaker sounds the best, I know I would!! biggrin.gif
post #1154 of 1502
Quote:
Originally Posted by LTD02 View Post

how do you mean?

You've got the Hz in the denominator.
post #1155 of 1502
They are massive, jeeze.
post #1156 of 1502
I want them.
post #1157 of 1502
"You've got the Hz in the denominator."

oh. i thought you were referring to the dimensions of the horn. the equation is more of a rough rule of thumb with the result being in hz. feel free to add inches and hz where necessary and then cancel them out to get an answer in hz.
post #1158 of 1502
Chop, dude, that is TOO serious. Oh, can I borrow your pressure washer bro?
post #1159 of 1502
Thread Starter 
Quote:
Originally Posted by beastaudio View Post

Chop, dude, that is TOO serious. Oh, can I borrow your pressure washer bro?

Of course you can.....only if you take the giant Toshiba console tv next to it biggrin.gif Mother made me promise not to trash it like 2 years ago because someone would want it.....it still eats up space in my garage
post #1160 of 1502
Take the giant Toshiba to a Habitat for Humanity 'Restore'. Then you can tell your Mother you didn't break your promise. smile.gif
post #1161 of 1502
Quote:
Originally Posted by ChopShop1 View Post

Of course you can.....only if you take the giant Toshiba console tv next to it biggrin.gif Mother made me promise not to trash it like 2 years ago because someone would want it.....it still eats up space in my garage

Had one of those in college. we crammed it into our little 800sq ft (with three bedrooms) place. With that and the couch in a small living room that literally was 8 feet wide, there was barely enough room to walk between the TV and the couch when someone was sitting on it. It was awesome.
post #1162 of 1502
Got a photo of the room these beasts are going into ?
post #1163 of 1502


ITS NOT GOING IN OUR YARD RUSS!!!
post #1164 of 1502
Thread Starter 
Quote:
Originally Posted by HFGuy View Post

Got a photo of the room these beasts are going into ?

Unfortunately I don't....it's a huge hole in the ground at this point.
post #1165 of 1502
Thread Starter 
woohoo...I can get started playing soon.


SEOSR passive components
post #1166 of 1502
Quote:
Originally Posted by ChopShop1 View Post

Unfortunately I don't....it's a huge hole in the ground at this point.

Based on the design of your speakers so far shall I suggest alot of rebar smile.gif
post #1167 of 1502
"woohoo...I can get started playing soon."

that was quick!
post #1168 of 1502
Thread Starter 
Quote:
Originally Posted by HFGuy View Post

Based on the design of your speakers so far shall I suggest alot of rebar smile.gif

Oh yeah...steal beams and corrugated decking ftw

Quote:
Originally Posted by LTD02 View Post

"woohoo...I can get started playing soon."

that was quick!

Sure was. I am hoping I'll get a bit of time this weekend to finish them up so that I can start testing either next week at night or over next weekend. The passive components for the surrounds shouldn't be far behind.
post #1169 of 1502
the vertical stack looks cool.

if you end up going with the vertical stack, the distances from the drivers to your ears will be a little off. if the differential distance starts to get more than 1/4 wavelength, the soundwaves won't be summing properly, at least in some sense.

this problem can be remedied in at least two ways. the first would be to physically align the drivers on an imaginary curved circle such that all the driver will be *physically* the same distance from your ear. just move the outermost woofers forward. the second way is to use delay on the in woofers and the coax in order to push them back "electronically". by adding delay to the units in the center the sound from all the sources will arrive at the same time.

such a setup would put all the drivers in perfect phase and so no shading of the outter woofers would be required.

out of align:


aligned physically, electronically, or both:


does it make a difference? will you even be able to tell? who knows? :-)~
post #1170 of 1502
LTD02, with regards to physically moving the outer woofers in a kind of curved circle so as to have the frequencies that they produce arrive at the same time as the other drivers...

..how would you go about doing this? Would you be relying on measurements to tell you when the drivers are in the right place? If so, what specific measurement would be useful for this?

I would imagine that by physically aligning the drivers so that their arrival times are correct, that would be a better way of doing it, compared to using delay in an EQ devise, right? I say this because adding delay just adds more "processing"to the original signal, which I would guess is a bad thing. Right?
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