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Your Home Theater ULF Score - Page 63

post #1861 of 1882
Looks great man!! The hard work really paid off.
post #1862 of 1882
I have gone vented to sealed with the same drivers. I course I needed to double up the power and drivers with sealed to keep up. You would think the ceiling and another wall would add at least 3 dBs since before the sealed subs had floor and wall only. All I will say is IB baby!
post #1863 of 1882
Oh, awesome job! I still say 4732's would fill that gap rather nicely.
post #1864 of 1882
Quote:
Originally Posted by MKtheater View Post

Oh, awesome job! I still say 4732's would fill that gap rather nicely.

+1 on the 4732s
post #1865 of 1882
Thread Starter 
Quote:
Originally Posted by notnyt View Post

Lol, want to update my score? Finally done. Gained 12db @ 15hz over sealed wink.gif

cTYOGxJ.jpg
Wow...I thought your sealed setup was intimidating...this definitely tops it! Congrats!

Guys, way way behind on updating this thread...too much going on in my non avs world, but will get to it! smile.gif
post #1866 of 1882
Quote:
Originally Posted by notnyt View Post

Lol, want to update my score? Finally done. Gained 12db @ 15hz over sealed wink.gif

cTYOGxJ.jpg

Good lord!
Do you need to wear adult diapers?
post #1867 of 1882
Quote:
Originally Posted by notnyt View Post

Lol, want to update my score? Finally done. Gained 12db @ 15hz over sealed wink.gif

cTYOGxJ.jpg


post #1868 of 1882
I haven't finished building my subs, so no measurements yet (last pair of FTW21's should arrive mid week), but based upon volume displacement capability comparison with the SI HT18D-2, here's how I manage....

A SI HT18D-2 has 5405cc of volume displacement; Sd = 1150cm2, Xmax of 23.5mm (1150 x 2.35 x 2 = 5405).

I have 4 FTW21, Sd = 1640.3, Xmax = 34mm for a total Vd of 44616cc. I also have 4 LAB12 and 4 (old) Adire Shivas with a Vd of 5269.7cc and 6118.3cc respectively for a total of 56000cc of swept displacement.

56000/5405 = 10.36 which I'll call as my SI equivalency.
Room size is 1830ft3, so 1830/10.36 = 176.6 which is my HT ULF score.

All drivers will be in sealed dual opposed with a Q of 0.707 or lower and I have a little under 19kW to power them all. Update, I just re simmed the FTW21's sealed in 220L ea (which is how I've designed them) and got a Qts of 0.577, almost the same as the SI in the data-bass test.

Here are the two compared in terms of frequency response with input power adjusted so they are almost the same at 100Hz (SI is 0.3dB higher) so the difference between then will be about 0.5dB at 10Hz, all being equivalent. Close enough for guv'mint work.




I don't have anywhere convenient to do CEA tests like Josh and I doubt I'll be able to test at full power when finished so this will have to do.
post #1869 of 1882
Room size: 2394 ft^3
Subs: 2 Rythmik FV15hps
SI=1.9 x 2 = 3.8
HT ULF Score = 2394 / 3.8= 630 @ 12.5Hz
post #1870 of 1882
Quote:
Originally Posted by notnyt View Post

Lol, want to update my score? Finally done. Gained 12db @ 15hz over sealed wink.gif

cTYOGxJ.jpg

 

I'd love to know where your system ranks now. The demo you gave me was outright awesome.

post #1871 of 1882
Quote:
Originally Posted by notnyt View Post

Lol, want to update my score? Finally done. Gained 12db @ 15hz over sealed wink.gif

cTYOGxJ.jpg

My god this is surreal! You must shake the entire house with this biggrin.gif
post #1872 of 1882
I think shake the entire house is a understatement...probably shakes a entire city block. smile.gif
post #1873 of 1882
Quote:
Originally Posted by bossobass View Post

Anyone else with a mic and SL please join in. Pick any of the scenes you personally use for demo, do a REW FR from the LP, a digital-feed SL cap of the scene and then a mic'd-at-the-LP cap and we'll instantly see why you prefer that particular scene. cool.gif

Here's my phoenix drop scene results with my new speakers:

^^^Mic'ed @ LP (with a cheap 2 cent mic)

^^^Digital



I noticed that the LFE track has a clipped waveform... interdasting!
Edited by BassThatHz - 4/11/14 at 8:30pm
post #1874 of 1882
Time for an update...smile.gif

post #1875 of 1882
Quote:
Originally Posted by laugsbach View Post

Time for an update...smile.gif


What does your sub setup consist of?
post #1876 of 1882
Quote:
Originally Posted by Pain Infliction View Post

What does your sub setup consist of?

(5) SI HT-18 D4 in 4cf sealed boxes...
(2) Mach 5 UXL-18 in 4cf sealed boxes...
(1) RE Audio MX-18 in a 25cf ported box...
post #1877 of 1882
Got any pics to show?
post #1878 of 1882
Quote:
Originally Posted by Pain Infliction View Post

Got any pics to show?

PM sent...smile.gif
post #1879 of 1882
Hell yeah I want to see that too, please.
post #1880 of 1882
Quote:
Originally Posted by Scott Simonian View Post

Hell yeah I want to see that too, please.

Scott, it is not in your league but here you go: smile.gif

http://www.avsforum.com/g/a/2360733/my-theater-room
post #1881 of 1882
Quote:
Originally Posted by laugsbach View Post

Scott, it is not in your league but here you go: smile.gif

http://www.avsforum.com/g/a/2360733/my-theater-room

Waaahhhhttt?!?! Dude. You have eight 18's (one in Josh's old LLT, f** yeah!), an AT screen, some nice high sensitivity mains...

How is that not "in my league"? wink.gif
post #1882 of 1882
Quote:
Originally Posted by Scott Simonian View Post

How is that not "in my league"? wink.gif

You are very kind Scott...smile.gif

My system might be the Florida State Seminoles of systems but yours is clearly the Seattle Seahawks of systems and your front sound stage is a dream of mine!!
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